81
Benthic Invertebrates and Demersal Fishes at an Interim Dredge-Disposal Site off Wiiiapa Bay, Washington by David R. Miller, Robert L Ernmett, and RobertJ. McConnell Aprii 1988

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Page 1: BenthicInvertebrates and Demersal Fishes atanInterim

Benthic Invertebrates

and Demersal Fishes

at an Interim Dredge-Disposal Site off Wiiiapa BayWashington

by David R Miller

RobertL Ernmett and

RobertJ McConnell

Aprii 1988

BENTHIC INVERTEBRATES AND DEMERSAL FISHES AT AN

INTERIM DREDGE-DISPOSAL SITE OFF WILLAPA BAY WASHINGTON

by

David R Miller

Robert L Enunett

At and Robert J McConnell

Final Report of Research

funded by

Environmental Protection Agency Region 10

1200 Sixth Avenue

^ Seattle Washington 98101 Contract DW 13931463-01-0

and

Coastal Zone and Estuarlne Studies Division

Northwest and Alaska Fisheries Center

National Marine Fisheries Service

National Oceanic and Atmospheric Administration 2725 Montlake Boulevard East

Seattle Washington 98112

April 1988

CONTENTS

Page

INTRODUCTION 1

METHODS 3

Fish and Vaglle Epifauna 3

Benthic Invertebrates and Sediments 5

Data Analysis 5

Fish and Vaglle Epifauna 5

Benthic Invertebrates 3

Sediments ^

RESULTS 9

Fish and Vaglle Epifauna 9

Benthic Invertebrates 9

Sediments 13

DISCUSSION 13

Fish and Vaglle Epifauna 13

Benthic Invertebrates 13

Sediments 1^

SUMMARY 16

ACKNOWLEDGMENTS 18

LITERATURE CITED 19

APPENDIX 21

INTRODUCTION

The Environmental Protection Agency (EPA) and the U Slaquo Army Corps of

Engineers (COE) are responsible for designating and managing ocean dredged

material disposal sites under the Marine Protection Research and Sanctuaries

Act (MPRSA) of 1972 (P L- 92-532 called the Ocean Dumping Act) The MPRSA

was passed in recognition that the disposal of wastes into ocean waters could

potentially adversely affect the environment and MPRSA requires that such

disposal occur only at designated sites The EPA requires that site

designations be based on 1) environmental studies at each site and 2) historical

information on the impact of dredged material disposal on areas similar to such

sites in physical chemical and biological characteristics

Within the National Oceanic and Atmospheric Administration the National

Marine Fisheries Service (NMFS) has the primary Federal responsibility for the

conservation management and development of the Nations fishery resources

under the Fishery Conservation and Management Act P L 9^-265 The NMFS

Habitat Conservation Policy recognizes that healthy marine estuarine and

anadromous fish habitats are essential to maintaining the Nation s fisheries

Under this policy the NMFS has been cooperating with the EPA and COE in

evaluating interim offshore dredge disposal sites in Oregon and Washington

In July 1985 the National Marine Fisheries Service (NMFS) entered into a

cooperative agreement with the EPA and the Seattle District COE to conduct an

ecological survey at a proposed interim dredge disposal site off Wiliapa Bay

Washington between 30 July and 1 August 1985- Previous studies at the proposed

site (10-15 fathoms) by Simons (198A) and Shapiro and Associates Inc (1985)

indicated high benthic invertebrate densities similar to those found off

Tlllamook Bayj Oregon (gt70000 organismsm^) at 10-20 fathoms by Emmett et albull

(1987) As a result EPA requested additional benthlc Invertebrate sampling

prior to final site designation However the Wlllapa Bay Interim disposal site

was subsequently moved to deeper water (10-2A fathoms) because of the Intensive

commercial crab fishery at the original site and It was at this new site that

our sampling took place

Benthlc Invertebrate communities are commonly monitored during

environmental assessment surveys Benthlc Invertebrates are useful Indicators

of environmental conditions because 1) they are In contact with bottom sediments

(dredge spoils) 2) being relatively Immobile they may be either transported or

burled by dredge spoils and 3) they provide a critical link In the food chain

(Morton 1977)

Bottom trawl surveys sampling fishes and crabs at dredge sites can be

Important In determining what species use an area for migration spawning

rearing or feeding However dredging effects on fishes and crabs are

difficult to quantify because of the animals mobility contagious distribution

and ability to avoid disturbed habitats

Combined benthlc Invertebrate fish and crab surveys are especially

useful In Identifying both the diversity and structure of the benthlc community

and In distinguishing possible food-web linkages between Infauna and vaglle

eplfauna (fishes and crabs)

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 2: BenthicInvertebrates and Demersal Fishes atanInterim

BENTHIC INVERTEBRATES AND DEMERSAL FISHES AT AN

INTERIM DREDGE-DISPOSAL SITE OFF WILLAPA BAY WASHINGTON

by

David R Miller

Robert L Enunett

At and Robert J McConnell

Final Report of Research

funded by

Environmental Protection Agency Region 10

1200 Sixth Avenue

^ Seattle Washington 98101 Contract DW 13931463-01-0

and

Coastal Zone and Estuarlne Studies Division

Northwest and Alaska Fisheries Center

National Marine Fisheries Service

National Oceanic and Atmospheric Administration 2725 Montlake Boulevard East

Seattle Washington 98112

April 1988

CONTENTS

Page

INTRODUCTION 1

METHODS 3

Fish and Vaglle Epifauna 3

Benthic Invertebrates and Sediments 5

Data Analysis 5

Fish and Vaglle Epifauna 5

Benthic Invertebrates 3

Sediments ^

RESULTS 9

Fish and Vaglle Epifauna 9

Benthic Invertebrates 9

Sediments 13

DISCUSSION 13

Fish and Vaglle Epifauna 13

Benthic Invertebrates 13

Sediments 1^

SUMMARY 16

ACKNOWLEDGMENTS 18

LITERATURE CITED 19

APPENDIX 21

INTRODUCTION

The Environmental Protection Agency (EPA) and the U Slaquo Army Corps of

Engineers (COE) are responsible for designating and managing ocean dredged

material disposal sites under the Marine Protection Research and Sanctuaries

Act (MPRSA) of 1972 (P L- 92-532 called the Ocean Dumping Act) The MPRSA

was passed in recognition that the disposal of wastes into ocean waters could

potentially adversely affect the environment and MPRSA requires that such

disposal occur only at designated sites The EPA requires that site

designations be based on 1) environmental studies at each site and 2) historical

information on the impact of dredged material disposal on areas similar to such

sites in physical chemical and biological characteristics

Within the National Oceanic and Atmospheric Administration the National

Marine Fisheries Service (NMFS) has the primary Federal responsibility for the

conservation management and development of the Nations fishery resources

under the Fishery Conservation and Management Act P L 9^-265 The NMFS

Habitat Conservation Policy recognizes that healthy marine estuarine and

anadromous fish habitats are essential to maintaining the Nation s fisheries

Under this policy the NMFS has been cooperating with the EPA and COE in

evaluating interim offshore dredge disposal sites in Oregon and Washington

In July 1985 the National Marine Fisheries Service (NMFS) entered into a

cooperative agreement with the EPA and the Seattle District COE to conduct an

ecological survey at a proposed interim dredge disposal site off Wiliapa Bay

Washington between 30 July and 1 August 1985- Previous studies at the proposed

site (10-15 fathoms) by Simons (198A) and Shapiro and Associates Inc (1985)

indicated high benthic invertebrate densities similar to those found off

Tlllamook Bayj Oregon (gt70000 organismsm^) at 10-20 fathoms by Emmett et albull

(1987) As a result EPA requested additional benthlc Invertebrate sampling

prior to final site designation However the Wlllapa Bay Interim disposal site

was subsequently moved to deeper water (10-2A fathoms) because of the Intensive

commercial crab fishery at the original site and It was at this new site that

our sampling took place

Benthlc Invertebrate communities are commonly monitored during

environmental assessment surveys Benthlc Invertebrates are useful Indicators

of environmental conditions because 1) they are In contact with bottom sediments

(dredge spoils) 2) being relatively Immobile they may be either transported or

burled by dredge spoils and 3) they provide a critical link In the food chain

(Morton 1977)

Bottom trawl surveys sampling fishes and crabs at dredge sites can be

Important In determining what species use an area for migration spawning

rearing or feeding However dredging effects on fishes and crabs are

difficult to quantify because of the animals mobility contagious distribution

and ability to avoid disturbed habitats

Combined benthlc Invertebrate fish and crab surveys are especially

useful In Identifying both the diversity and structure of the benthlc community

and In distinguishing possible food-web linkages between Infauna and vaglle

eplfauna (fishes and crabs)

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 3: BenthicInvertebrates and Demersal Fishes atanInterim

CONTENTS

Page

INTRODUCTION 1

METHODS 3

Fish and Vaglle Epifauna 3

Benthic Invertebrates and Sediments 5

Data Analysis 5

Fish and Vaglle Epifauna 5

Benthic Invertebrates 3

Sediments ^

RESULTS 9

Fish and Vaglle Epifauna 9

Benthic Invertebrates 9

Sediments 13

DISCUSSION 13

Fish and Vaglle Epifauna 13

Benthic Invertebrates 13

Sediments 1^

SUMMARY 16

ACKNOWLEDGMENTS 18

LITERATURE CITED 19

APPENDIX 21

INTRODUCTION

The Environmental Protection Agency (EPA) and the U Slaquo Army Corps of

Engineers (COE) are responsible for designating and managing ocean dredged

material disposal sites under the Marine Protection Research and Sanctuaries

Act (MPRSA) of 1972 (P L- 92-532 called the Ocean Dumping Act) The MPRSA

was passed in recognition that the disposal of wastes into ocean waters could

potentially adversely affect the environment and MPRSA requires that such

disposal occur only at designated sites The EPA requires that site

designations be based on 1) environmental studies at each site and 2) historical

information on the impact of dredged material disposal on areas similar to such

sites in physical chemical and biological characteristics

Within the National Oceanic and Atmospheric Administration the National

Marine Fisheries Service (NMFS) has the primary Federal responsibility for the

conservation management and development of the Nations fishery resources

under the Fishery Conservation and Management Act P L 9^-265 The NMFS

Habitat Conservation Policy recognizes that healthy marine estuarine and

anadromous fish habitats are essential to maintaining the Nation s fisheries

Under this policy the NMFS has been cooperating with the EPA and COE in

evaluating interim offshore dredge disposal sites in Oregon and Washington

In July 1985 the National Marine Fisheries Service (NMFS) entered into a

cooperative agreement with the EPA and the Seattle District COE to conduct an

ecological survey at a proposed interim dredge disposal site off Wiliapa Bay

Washington between 30 July and 1 August 1985- Previous studies at the proposed

site (10-15 fathoms) by Simons (198A) and Shapiro and Associates Inc (1985)

indicated high benthic invertebrate densities similar to those found off

Tlllamook Bayj Oregon (gt70000 organismsm^) at 10-20 fathoms by Emmett et albull

(1987) As a result EPA requested additional benthlc Invertebrate sampling

prior to final site designation However the Wlllapa Bay Interim disposal site

was subsequently moved to deeper water (10-2A fathoms) because of the Intensive

commercial crab fishery at the original site and It was at this new site that

our sampling took place

Benthlc Invertebrate communities are commonly monitored during

environmental assessment surveys Benthlc Invertebrates are useful Indicators

of environmental conditions because 1) they are In contact with bottom sediments

(dredge spoils) 2) being relatively Immobile they may be either transported or

burled by dredge spoils and 3) they provide a critical link In the food chain

(Morton 1977)

Bottom trawl surveys sampling fishes and crabs at dredge sites can be

Important In determining what species use an area for migration spawning

rearing or feeding However dredging effects on fishes and crabs are

difficult to quantify because of the animals mobility contagious distribution

and ability to avoid disturbed habitats

Combined benthlc Invertebrate fish and crab surveys are especially

useful In Identifying both the diversity and structure of the benthlc community

and In distinguishing possible food-web linkages between Infauna and vaglle

eplfauna (fishes and crabs)

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 4: BenthicInvertebrates and Demersal Fishes atanInterim

INTRODUCTION

The Environmental Protection Agency (EPA) and the U Slaquo Army Corps of

Engineers (COE) are responsible for designating and managing ocean dredged

material disposal sites under the Marine Protection Research and Sanctuaries

Act (MPRSA) of 1972 (P L- 92-532 called the Ocean Dumping Act) The MPRSA

was passed in recognition that the disposal of wastes into ocean waters could

potentially adversely affect the environment and MPRSA requires that such

disposal occur only at designated sites The EPA requires that site

designations be based on 1) environmental studies at each site and 2) historical

information on the impact of dredged material disposal on areas similar to such

sites in physical chemical and biological characteristics

Within the National Oceanic and Atmospheric Administration the National

Marine Fisheries Service (NMFS) has the primary Federal responsibility for the

conservation management and development of the Nations fishery resources

under the Fishery Conservation and Management Act P L 9^-265 The NMFS

Habitat Conservation Policy recognizes that healthy marine estuarine and

anadromous fish habitats are essential to maintaining the Nation s fisheries

Under this policy the NMFS has been cooperating with the EPA and COE in

evaluating interim offshore dredge disposal sites in Oregon and Washington

In July 1985 the National Marine Fisheries Service (NMFS) entered into a

cooperative agreement with the EPA and the Seattle District COE to conduct an

ecological survey at a proposed interim dredge disposal site off Wiliapa Bay

Washington between 30 July and 1 August 1985- Previous studies at the proposed

site (10-15 fathoms) by Simons (198A) and Shapiro and Associates Inc (1985)

indicated high benthic invertebrate densities similar to those found off

Tlllamook Bayj Oregon (gt70000 organismsm^) at 10-20 fathoms by Emmett et albull

(1987) As a result EPA requested additional benthlc Invertebrate sampling

prior to final site designation However the Wlllapa Bay Interim disposal site

was subsequently moved to deeper water (10-2A fathoms) because of the Intensive

commercial crab fishery at the original site and It was at this new site that

our sampling took place

Benthlc Invertebrate communities are commonly monitored during

environmental assessment surveys Benthlc Invertebrates are useful Indicators

of environmental conditions because 1) they are In contact with bottom sediments

(dredge spoils) 2) being relatively Immobile they may be either transported or

burled by dredge spoils and 3) they provide a critical link In the food chain

(Morton 1977)

Bottom trawl surveys sampling fishes and crabs at dredge sites can be

Important In determining what species use an area for migration spawning

rearing or feeding However dredging effects on fishes and crabs are

difficult to quantify because of the animals mobility contagious distribution

and ability to avoid disturbed habitats

Combined benthlc Invertebrate fish and crab surveys are especially

useful In Identifying both the diversity and structure of the benthlc community

and In distinguishing possible food-web linkages between Infauna and vaglle

eplfauna (fishes and crabs)

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 5: BenthicInvertebrates and Demersal Fishes atanInterim

Tlllamook Bayj Oregon (gt70000 organismsm^) at 10-20 fathoms by Emmett et albull

(1987) As a result EPA requested additional benthlc Invertebrate sampling

prior to final site designation However the Wlllapa Bay Interim disposal site

was subsequently moved to deeper water (10-2A fathoms) because of the Intensive

commercial crab fishery at the original site and It was at this new site that

our sampling took place

Benthlc Invertebrate communities are commonly monitored during

environmental assessment surveys Benthlc Invertebrates are useful Indicators

of environmental conditions because 1) they are In contact with bottom sediments

(dredge spoils) 2) being relatively Immobile they may be either transported or

burled by dredge spoils and 3) they provide a critical link In the food chain

(Morton 1977)

Bottom trawl surveys sampling fishes and crabs at dredge sites can be

Important In determining what species use an area for migration spawning

rearing or feeding However dredging effects on fishes and crabs are

difficult to quantify because of the animals mobility contagious distribution

and ability to avoid disturbed habitats

Combined benthlc Invertebrate fish and crab surveys are especially

useful In Identifying both the diversity and structure of the benthlc community

and In distinguishing possible food-web linkages between Infauna and vaglle

eplfauna (fishes and crabs)

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 6: BenthicInvertebrates and Demersal Fishes atanInterim

METHODS

Fish and Vagile Epifauna

Sampling was done with an 8-m semiballoon shrimp trawl having an overall

mesh size of 381 mm (stretch measure) a 127-mm mesh liner was inserted in the

cod end to ensure retention of smaller fish and invertebrates Fishing width of

the trawl was estimated to be about 5m A trawl tow of 10 min duration timed

from when the trawl reached bottom to the beginning of retrieval was made on

each of three depth contours mdash 20-fathom (37-m) 22-fathom (40-m) and 2kshy

fathom (44-m) (Fig 1) Position fixes and distance traveled were determined by

Loran-C (Appendix Table A)

Fish and Dungeness crab (Cancer magister) from each trawl catch were

identified and a subsample of 50 individuals of each species was measured (mm)

[total and standard lengths for fishes and carapace width (across the carapace

anterior to the 10th anterolateral spines) for crabs] and weighed (g) The

remainder of each species was counted and weighed as a group (Appendix Table B)

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 7: BenthicInvertebrates and Demersal Fishes atanInterim

Nautical miles

1 1

I (

(

^ iTrawl 1

33 I1 i 46deg 44shyr 7-1p--j^ i i

N

T W

i L A p

B

A y

Dredge disposal VbullC 46deg 40shysite

Trawl I

l I 22 TravTraw

i I (

22fm 10fm I

24fm J ^ 20fm

1

V 46deg 36shy

LEGENDBOX CORE )2024 22

W-1-1W-3-1 W-2-1 VW-1-2

W-3-3 W-2-3 W-1-3

W-3-4 W-2-4 W-1-4

W-3-5 W-2-5 W-1-5

W-3-2 W-2-2

f 124deg 10

I z Figure 1mdashTrawl (fish and vagile epifauna) and box corer (benthic

invertebrates) sampling locations off Willapa Bay Washington

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 8: BenthicInvertebrates and Demersal Fishes atanInterim

Benthlc Invertebrates and Sediments

Sampling was completed at 15 stations along three transects at the 20-raquo

22- and 2A-fathom contours (Fig 1) A 0096-m2 Gray-OHara box corer (Fig 2)

(Pequegnat et al 1981) was used to collect six samples at each station Three

of these were individually sieved through a QS-mm diameter mesh screen and the

residue containing the macro-invertebrates was placed in jars and preserved in a

buffered 5^ formaldehyde solution containing rose bengal (a protein stain) Of

the remaining three samples one was subsampled for sediment and two reserved

for possible future analysis Sediment grain size was determined by sieving and

organic content by burning for 1 h at 600deg C (Appendix Table C) Sediment

analysis was done by the COE sediment laboratory at Troutdale Oregon

At the NMFS field station in Hammond Oregon the benthic organisms were picked

from the preserved samples identified to the lowest possible taxonomic level

(usually species) and counted All specimens were placed in vials containing

705s ethyl alcohol and stored at Hammond

Data Analysis

Fish and Vagile Epifauna

Various computer programs on the Northwest and Alaska Fisheries Centers

(NWAFC) Burroughs (B7800)l^ computer were used to analyze the sampling data

Loran-C readings were used to estimate distances fished Fish and crab

Reference to trade names does not imply Indorsement by National Marine

Fisheries Service NOAA

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce hartmanae 13 1000 451 159

Phvllodoce multiseriata 2 333 69 120

Phvllodoce sp juveniles 3 666 104 104

Eteone sp juvenile 1 333 34 60

Eteone californica 7 1000 243 159

Pholoe minuta 35 1000 1215 394

Sthenalais tertiaalabra 4 666 138 159

Thalenessa spinosa 4 666 13-3 159

Syllidae 1 333 34 60

Autolvtus sp 1 333 34 60

Glvcinde armiaera 11 1000 381 120

Glvcinde sp juvenile 1 333 34 60

Goniada maculata 8 666 277 240

Goniada sp juvenile 1 333 34 60

Nephtvs caecoides 17 666 590 534

Nephtvs sp juvenile 51 1000 1770 1082

Onuphis iridescens 29 1000 1006 1294

Onuphis sp indet 91 1000 3159 2535

Lumbrineris bicirrata 9 666 312 275

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Galathowenia nr G oculata 3 666 104 104

Owenia fusiformis 1306 1000 62708 9504

Pectinaria californiensis 2 666 69 60

E-20

3Station no W-2-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() m^ m^

Ampharete acutifrons 4 666 138 159

Melinna sp juvenile 2 333 69 120

Polvcirrus sp complex 13 1000 451 318

Euchone nr E hancocki 1 333 34 60

Gastropoda 14 1000 486 262

Bivalvia 140 1000 4861 573

Scaphopoda 1 333 34 60

Copepoda 26 666 902 939

Ostracoda sp A 117 1000 4062 208

Ostracoda sp B 1 333 34 60

Diastylis sp juvenile 3 333 104 180

Diastvlopsis dawsoni 50 1000 1736 1147

OxYurostvlis pacifica 4 666 138 159

Leucon subnasica 5 666 173 159

Camplvapsis sp 1 333 34 60

Anthuridae 1 333 34 60

Edotea sublittoralis 8 666 277 318

Synidotea sp 1 333 34 60

Nunna sp 1 333 34 60

Pleurogonium rubicundum 2 666 69 60

Gnorimosphaeroma oregonensis 1 333 34 60

Ampelisca agassizi 7 333 243 421

Ampelisca macrocephala 33 1000 1145 520

Ampelisca spp juvenile 4 333 138 240

m Eohaustorius spp 2 333 69 120

Lysianassidae 3 333 104 180

Anonys adoxuscerinatus 1 333 34 60

Lysianassidae juvenile 4 666 138 159

Photis brevipes 10 1000 347 216

Photis sp juvenile 39 1000 1354 454

m Protomedeia prudens 4 333 138 240

Protomedeia spp juvenile 16 1000 555 240

Ischyrocerus pegalops 1 333 34 60

Rhepoxynius spp 37 1000 1284 781

Rhepoxynius dabouis 21 1000 729 208

Rhepoxynius abronius 6 666 208 208

Ax Sympleustes subglaber 7 1000 243 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 12 666 416 375

Caprellidae 10 666 347 433

Nebalia pugettensis 4 666 138 159

Callianassa californiensis 1 333 34 60

m Pinnixa sp megalopa 1 333 34 60

Porcellanidae 1 333 34 60

Ophiuroidea 4 1000 138 60

E-21

station no W-2-4 Date 30 Jul 85 Sample size 3 (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

) m m

Holothuroidea 333 34 60

Number of taxa= 90

Mean number per sample 114000 Standard deviation (SD) 9978

Mean numberm^ 1187500 SDm^ 103942

H= 322 SDV= 070 SR=1106 J= 050

E-2

3Station no W-2-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 3 666 104 104

Leitoscoloolos puaettensis 29 1000 1006 433

Phvlo (Orbinia) felix 10 1000 347 216

Scoloplos acmeceps 9 1000 312 180

Aricidea nr A suecica 22 1000 763 421

Spiophanes berkelevorum 23 1000 798 216

Spiophanes bombvx 221 1000 7673 910

Maaelona sacculata 1 333 34 60

Magelona hartmanae 5 666 173 159

Chaetozone setosa 36 1000 1250 551

Hediomastus ambiseta 5 1000 173 60

Mediomastus sp indet 3 333 104 180

Mediomastus californiensis 1 333 34 60

Maldanidae 4 666 138 159

Euclvmene zonalis 7 1000 243 159

Phvllodoce hartmanae 7 1000 243 60

Phyllodoce longipes 1 333 34 60

Phvllodoce multiseriata 2 333 69 120

Eteone fauchaldi 3 1000 104 00

Eteone spp 2 333 69 120

Eteone californica 3 333 104 180

Polynoidae 1 333 34 60

Pholoe minuta 20 1000 694 240

Sthenalais tertiaglabra 3 333 104 180

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armigera 7 1000 243 120

Glycinde sp juvenile 1 333 34 60

Goniada maculata 10 1000 347 334

Nephtys caecoides 26 1000 902 120

Nephtys sp juvenile 25 1000 868 524

Onuphis iridescens 60 666 2083 2678

Onuphis sp indet 72 666 2500 3801

Lumbrineris bicirrata 4 666 138 159

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 1 333 34 60

Owenia fusiformis 1132 1000 41041 12484

Arapharete acutifrons 4 666 133 120

Melinna elisabethae 2 333 69 120

Terebellidae 1 333 34 60

Polycirrus sp complex 11 1000 381 216

Euchone nr E hancocki 2 666 69 60

Gastropoda 5 1000 173 60

Bivalvia 127 1000 4409 1413

Ostracoda sp A 75 1000 2604 2226

E-23

Station no W-2-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Ostracoda sp B Diastvlopsis dawsoni

Hemilamprops sp

Leucon subnasica

Edotea sublittoralis

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Ampelisca aaassizi

Ampelisca macrocephala

Ampelisca spp iuvenile

Eohaustorius sawveri

Corophidae Isaeidae

Photis brevipes

Photis sp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Callianassa californiensis

Pinnixa sp megalopa

Porcellanidae

Ophiuroidea

Number of taxa= 71

Mean number per sample

Mean numberm^ 774653

H= 315 SDV= 070

Total Frequency of

number occurrence

()

2 666

22 1000

1 333

2 333

5 666

1 333

1 333

2 333

12 1000

13 1000

18 333

2 333

2 333

4 333

3 333

10 666

43 666

12 666

11 666

3 333

3 333

4 1000

1 333

4 1000

1 333

10 1000

Mean Standard

number deviation

m^ m^

69 60

763 573

34 60

69 120

173 159

34 60

34 60

69 120

416 541

451 240

625 1082

69 120

69 120

138 240

104 180

347 513

1493 1693

416 551

381 492

104 180

104 180

138 60

34 60

138 60

34 60

347 60

74367 Standard deviation (SD) 15106

SDm 157358

SR= 908 J= 051

E-24

Station no W-3-1 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m2

Nemertinea 6 1000 208 104

Leitoscoloplos puaettensis 12 666 416 375

Phvlo (Orbinia) felix 4 666 138 159

Scoloplos acmeceos 2 666 69 60

Aricidea nr A suecica 90 1000 3125 633

Prionospio cirrifera 3 333 104 180

Prionospio cirriferaMighti 1 333 34 60

Spiophanes berkelevorum 5 1000 173 60

Spiophanes bombvx 224 1000 7777 1027

Magelona sacculata 1 333 34 60

Magelona hartmanae 8 666 277 318

Magelona longicornisXhartmanae 1 333 34 60

Chaetozone setosa 32 1000 1111 334

Tharvx multifilis 1 333 34 60

Decamastus gracilis 8 666 277 318

Mediomastus ambiseta 6 333 208 360

Mediomastus sp indet 2 333 69 120

Mediomastus californiensis 1 333 34 60

Notomastus lineatus 5 666 173 159

Haldanidae 1 333 34 60

Euclvmene zonalis 2 666 69 60

Praxillella affinis 3 333 104 180

Phyllodoce mucosa 1 333 34 60

Phyllodoce multiseriata 4 666 138 159

Anaitides multipapillata 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone sp indet 2 333 69 120

Eteone sp juvenile 1 333 34 60

Eteone californica 2 666 69 60

Eumida sanguinea 1 333 34 60

Aphroditidae 1 333 34 60

Pholoe minuta 2 666 69 60

Sthenalais tertiaglabra 2 333 69 120

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Autolytus sp- 3 666 104 104

Glycera convoluta 1 333 34 60

Glycinde armigera 10 1000 347 60

Glycinde sp juvenile 2 333 69 120

Goniada maculata 3 666 104 104

Nephtys caeca 2 333 69 120

Nephtys caecoides 11 1000 381 394

Nephtys sp juvenile 21 1000 729 375

Onuphidae sp juvenile 23 333 798 1383

E-25

station no W-3-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) m^ vr

OnuDhis iridescens 14 666 486 469

Onuphis sp indet 88 666 3055 2678

Lumbrineris bicirrata 4 333 138 240

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 8 1000 277 216

Galathowenia nr G oculata 6 1000 208 180

Owenia fusiformis 1426 1000 49513 30017

Pectinaria californiensis 1 333 34 60

Ampharetidae 4 666 138 159

Ampharete acutifrons 1 333 34 60

Polycirrus sp complex 6 1000 208 104

Euchone nr E hancocki 6 666 208 208

Hirudinea 1 333 34 60

Gastropoda 21 1000 729 275

Bivalvia 84 1000 2916 1201

Copepoda 32 1000 1111 573

Ostracoda sp A 95 1000 3298 739

Diastvlopsis dawsoni 26 1000 902 669

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 6 666 208 180

Edotea sublittoralis 3 666 104 104

Pleuroaonium rubicundum 5 1000 173 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 11 666 381 334

Ampelisca macrocephala 18 1000 625 00

Ampelisca spp juvenile 18 666 625 903

Eohaustorius spp 4 333 138 240

Eohaustorius sawyeri 4 666 133 159

Photis parvidens 5 666 173 159

Photis sp juvenile 8 666 277 262

Protomedeia prudens 5 1000 173 60

Protomedeia spp juvenile 7 666 243 216

Rhepoxvnius spp 25 1000 368 731

Rhepoxynius dabouis 32 1000 1111 669

Rhepoxvnius abronius 10 1000 347 60

Dulichia sp juvenile 3 666 104 104

Caprellidae 10 666 347 433

Nebalia puqettensis 2 333 69 120

Decapoda larvae 5 666 173 216

Pinnixa sp megalopa 5 666 173 159

Ophiuroidea 11 1000 381 300

Holothuroidea 2 666 69 60

station no W-3-1 Date 31 Jul 85 Sample size 3 (CONTINUED)

Number of taxa= 86

Mean number per sample 84633 Standard deviation (SD) 30596

Mean number m^ 881597 SD m^ 318713

H= 310 SDV= 067 SR=1097 J= 048

E-27

Station no W-3-2 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 10 1000 347 134

Leitoscoloplos puaettensis 20 1000 694 216

Phylo (Orbinia) felix 1 333 34 60

Aricidea suecica 64 333 2222 3849

Aricidea nr A suecica 39 666 1354 1469

Minuspio cirrifera 1 333 34 60

Prionospio cirrifera 9 333 312 541

Spiophanes berkelevorum 7 1000 243 60

Spiophanes bombyx 332 1000 11527 4221

Maqelona spp 3 333 104 180

Maaelona sacculata 2 333 69 120

Macrelona hartmanae 5 666 173 216

Chaetozone setosa 31 1000 1076 524

Tharyx multifilis 1 333 34 60

Decamastus aracilis 4 666 138 120

Heteromastus filobranchus 1 333 34 60

Heteromastus filiformis 10 333 347 601

Mediomastus ambiseta 1 333 34 60

Medioraastus sp indet 3 666 104 104

Notomastus lineatus 2 333 69 120 CO

Haldanidae 1 333 34 60

Euclymene zonalis 8 666 277 394

Axiothella rubrocincta 5 333 173 300

Phyllodoce hartmanae 4 666 138 120

Anaitides hartmanae 5 333 173 300

Phyllodoce lonaipes 3 333 104 180

Anaitides multipapillata 4 1000 138 60

Eteone spp 1 333 34 60

Eteone sp juvenile 1 333 34 60

Eteone californica 666 159

Pholoe minuta 7 666 243 334

Sthenalais tertiaalabra 1 333 34 60

Thalenessa spinosa 3 666 104 104

Pilargidae 1 333 34 60

Autolytus sp 333 69 120

Nereis spp 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 15 1000 520 130

Glycinde sp juvenile 1 333 34 60

Glycinde picta 1 333 34 60

Goniada maculata 5 666 173 216

Nephtys caecoides 5 666 173 159

Wephtys spp 15 333 520 902

Nephtys sp juvenile 39 666 1354 1263

Onuphis iridescens 1 333 34 60

E-28

Station no W-3-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Onuphis eleaans 82 666 2847 2468

Onuphis sp indet 63 666 2187 2933

Lumbrineris spp 3 333 104 180

Lumbrineris bicirrata 8 1000 277 120

Lumbrineris luti 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Galathowenia nr G oculata 2 666 69 60

Mvriochele heeri 27 333 937 1623

Owenia collaris 49 333 1701 2946

Owenia fusiformis 1597 1000 55451 16672 Pectinaria spp 3 333 104 180

Ampharetidae 4 333 138 240

Ampharete acutifrons 4 666 138 159

Polycirrus spp 1 333 34 60

Polvcirrus sp complex 1 333 34 60

Amaeana occidentalis 2 333 69 120

Sabellidae 4 333 138 240

Gastropoda 4 666 138 120

Bivalvia 64 666 2222 2097

Yoldia scissurata 1 333 34 60

Modiolus spp 7 333 243 421

Lucinoma annulata 14 333 486 842

Macoma elimata 1 333 34 60

Hacoma expansa 16 333 555 962

Tellina modesta 1 333 34 60

Siliaua sloati 5 333 173 300

Scaphopoda 1 333 34 60

Dentalium spp 4 333 138 240

Copepoda 7 333 243 421

Ostracoda sp A 43 1000 1493 2316

Ostracoda sp B 98 1000 3402 3505

Nebalia sp 1 333 34 60

Campvlaspis 1 333 34 60

Diastylis sp iuvenile 47 666 1631 2648

Diastylopsis dawsoni 112 1000 3888 3603

Leucon subnasica 2 666 69 60

Isopoda 2 333 69 120

Synidotea sp 1 333 34 60

Pleurogonium rubicundum 2 333 69 120

Ampelisca a3assjzi 12 333 416 721

Ampelisca macrocephala 15 666 520 520

Ampelisca spp juvenile 3 333 104 130

Annisogammarus pugettensis 14 333 486 342

Eohaustorius spp 3 666 104 104

Lysianassidae 1 333 34 60

E-29

station no W-3-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation () m^ m

Lysianassidae juvenile 2 333 69 120

Photis parvidens 4 333 138 240

Photis sp juvenile 11 666 381 421

Photis macinernevi 33 333 1145 1984

Protomedeia prudens 6 666 208 180

Protomedeia spp juvenile 5 333 173 300

Cheriphotis sp 5 333 173 300

Rhepoxynius spp 37 666 1284 1113

Rhepoxvnius dabouis 14 666 486 433

Rhepoxynius abronius 7 1000 243 120

Rhepoxynius lucubrans 50 333 1736 3007

Parapleustes den 2 333 69 120

Caprellidae 3 333 104 180

Paguridae 1 333 34 60

Pinnixa sp megalopa 4 666 138 120

Pinnixa occidentalis 4 333 138 240

Ophiuroidea 8 666 277 240

Amphiodia spp 7 333 243 421

Number of taxa= 108

Nean number per sample 107300 Standard deviation (SD) 36181

Mean numberm^ 1117708 SDm2 376889

H= 355 SDV= 074 SR=1325 J= 053

E-30

Station no W-3-3 Date 31 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 3 1000 104 00

Echiura 1 333 34 60

Leitoscoloplos pucrettensis 12 1000 416 104

Orbinia (Phylo) felix 7 666 243 262

Scoloplos acmeceps 1 333 34 60

Aricidea nr A suecica 61 1000 2118 492

Paraonella platvbranchia 1 333 34 60

Boccardia pugettensis 1 333 34 60

Laonice cirrata 1 333 34 60

Prionospio cirrifera 7 666 243 262

Spiophanes berkelevorum 27 1000 937 375

Spiophanes bombvx 369 1000 12812 4864

Magelona sacculata 1 333 34 60

Magelona hartmanae 2 333 69 120

Chaetozone setosa 30 1000 1041 541

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 666 69 60

Notomastus lineatus 2 666 69 60

Euclvmene zonalis 19 1000 659 159

Scalibregma inflatum 2 333 69 120

Phvllodoce hartmanae 1 333 34 60

Phvllodoce mucosa 1 333 34 60

Eteone californica 6 666 208 275

Aphrodite iaponica 1 333 34 60

Pholoe minuta 2 333 69 120

Thalenessa spinosa 2 333 69 120

Gyptis brevipalpa 1 333 34 60

Nereis zonata 2 333 69 120

Glycinde armigera 10 1000 347 262

Goniada maculata 5 1000 173 60

Nephtys caecoides 31 1000 1076 365

Nephtys sp iuvenile 20 1000 694 313

Onuphis iridescens 2 666 69 60

Onuphis sp indet 65 1000 2256 1421

Lumbrineris bicirrata 3 1000 277 216

Galathowenia nr G oculata 5 666 173 159

Owenia fusiformis 392 1000 13611 10585

Ampharete acutifrons 3 666 104 104

Helinna elisabethae 1 333 34 60

Helinna sp juvenile 2 666 69 60

Terebellidae sp iuvenile 1 333 34 60

Pplycirrus sp complex 12 1000 416 180

Euchone nr E hancocki 3 666 104 104

Gastropoda 7 1000 243 120

Bivalvia 45 1000 1562 541

E-31

station no W-3-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Stand

number occurrence number deviat

() m^ m^

Scaphopoda 3 666 104 104

Copepoda 25 333 868 1503

Ostracoda sp A 76 1000 2638 492

Leucon subnasica 1 333 34 60

Anthuridae 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Ampelisca aaassizi 6 1000 208 104

Ampelisca macrocephala 16 1000 555 334

Lysianassidae 3 666 104 104

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 3 666 104 104

Photis sp iuvenile 18 1000 625 208

Protomedeia spp juvenile 2 333 69 120

Ischvrocerus peaalops 1 333 34 60

Rhepoxynius spp 19 1000 659 159

Rhepoxvnius dabouis 24 1000 833 312

Rhepoxynius abronius 10 1000 347 240

Pleustidae 2 666 69 60

Dulichia monacantha 4 666 138 120

Dulichia sp juvenile 2 333 69 120

Pinnixa sp meaalopa 7 666 243 334

Brachyura 1 333 34 60

Ophiuroidea 8 1000 277 159

Holothuroidea 1 333 34 60

Other 1 333 34 60

Number of taxa= 70

Mean number per sample 47133 Standard deviation (SD) 15314

Mean numberm^ 490972 SDm^ 159516

H= 379 SDV= 084 SR= 951 J= 062

E-32

3Station no W-3-4 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence1 number deviation

() m^ m^

Nemertinea 11 1000 381 120

Leitoscolonlos nuaettensis 14 1000 486 492

Phylo (Orbinia) felix 5 1000 173 120

Aricidea nr A suecica 40 1000 1388 469

Laonice cirrata 1 333 34 60

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 3 666 104 104

Scolelepis spp 1 333 34 60

Spio filicornis 2 333 69 120

Spiophanes berkelevorum 12 1000 416 00

Spiophanes bombyx 532 1000 18472 6056

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 45 1000 1562 580

Tharyx secundus 1 333 34 60

Decamastus aracilis 3 333 104 180

Mediomastus ambiseta 1 333 34 60

Notomastus lineatus 7 1000 243 240

Euclymene zonalis 24 1000 833 275

Travisia sp indet 1 333 34 60

Phyllodoce hartmanae 2 666 69 60

Phyllodoce lonaipes 2 666 69 60

Eteone sp juvenile 1 333 34 60

Eteone californica 4 666 138 120

Pholoe minuta 2 666 69 60

Sthenalais tertiaalabra 3 666 104 104

Thalenessa spinosa 2 666 69 60

Gyptis brevipalpa 2 333 69 120

Glycinde armigera 12 1000 416 208

Goniada maculata 7 1000 243 120

Nephtys caecoides 35 1000 1215 767

Nephtys sp juvenile 10 1000 347 60

Onuphis iridescens 15 1000 520 454

Onuphis sp indet 58 1000 2013 1829

Lumbrineris bicirrata 3 666 104 104

Lumbrineris cruzensis 3 666 104 104

Notocirrus californiensis 1 333 34 60

Galathowenia nr G oculata 7 1000 243 159

Ovfenia fusiformis 232 1000 3055 4030

Ampharete acutifrons 1 333 34 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

^lycirr^^s sp complex 11 1000 381 159

Chone sp indet 1 333 34 60

Gastropoda 1 333 34 60

Bivalvia 49 1000 1701 1000

E-33

station no W-3-4 Date 30 Jul 86 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 39 1000 1354 1804

Ostracoda sp A 69 1000 2395 1623

Ostracoda sp B 1 333 34 60

Diastvlopsis dawsoni 2 666 69 60

Hemilamprops sp 2 333 69 120

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 1 333 34 60

Pleuroaonium rubicundum 1 333 34 60

Bathvcopea daltonae 1 333 34 60

Ampelisca aaassizi 6 333 208 360

Ampelisca macrocephala 16 1000 555 216

Ampelisca spp juvenile 22 666 763 781

Eohaustorius spp 10 1000 347 262

Eohaustorius sawyeri 2 333 69 120

Lysianassidae 1 333 34 60

Anonyx spp () 2 333 69 120

Corophium sp juvenile 1 333 34 60

Photis brevipes 7 666 243 334

Photis sp juvenile 7 666 243 334

Protomedeia prudens 333 173 300

Protomedeia spp juvenile 3 666 104 104

Rhepoxynius spp 21 1000 729 312

Rhepoxynius dabouis 16 1000 555 433

Rhepoxynius abronius 7 1000 243 60

Dulichia sp juvenile 1 333 34 60

Caprellidae 1 333 34 60

Nebalia puaettensis 2 666 69 60

Decapoda larvae 2 666 69 60

Pinnixa sp megalopa 3 666 104 104

Ophiuroidea 8 1000 277 159

Holothuroidea 2 666 69 60

Number of taxa= 76

Mean number per sample 47867 Standard deviation (SD) 15519

Mean numberm^ 498611 SDm^ 161658

H= 384 SDy= 083 SR=1032 J= 061

E-34

3Station no W-3-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Leitoscoloplos puaettensis 10 1000 347 60

Phylo (Orbinia) felix 14 1000 486 159

Aricidea nr A suecica 65 1000 2256 1207

Polvdora caullervi 1 333 34 60

Prionospio cirrifera 2 666 69 60

Spio filicornis 5 666 173 216

Spiophanes berkeleyorum 11 666 381 421

Spiophanes bombyx 445 1000 15451 1027

Maaelona sacculata 2 666 69 60

Maaelona hartmanae 12 1000 416 275

Chaetozone setosa 46 1000 1597 492

Tharyx multifilis 1 333 34 60

Decamastus crracilis 1 333 34 60

Notomastus lineatus 2 666 69 60

Maldanidae sp indet 2 333 69 120

Maldanidae 1 333 34 60

Euclymene zonalis 25 1000 868 365

Phyllodoce hartmanae 5 1000 173 60

Phyllodoce sp juveniles 1 333 34 60

Eteone californica 3 666 104 104

Pholoe minuta 3 1000 104 00

Sthenalais tertiaplabra 2 666 69 60

Thalenessa spinosa 1 333 34 60

Gyptis brevipalpa 1 333 34 60

Glycinde armiaera 6 1000 208 180

Goniada maculata 3 333 104 180

Nephtys caecoides 15 1000 520 275

Nephtys sp juvenile 12 1000 416 180

Onuphis iridescens 41 666 1423 1359

Onuphis sp indet 34 1000 1180 513

Lumbrineris bicirrata 2 333 69 120

Lumbrineris latreilli 1 333 34 60

Lumbrineris sp indet 2 333 69 120

Galathowenia nr G oculata 8 666 277 240

Owenia fusiformis 467 1000 16215 10554

Ampharete acutifrons 4 1000 138 60

Melinna elisabethae 1 333 34 60

Melinna sp juvenile 1 333 34 60

Terebellidae 1 333 34 50

Polycirrus sp complex 8 1000 277 60

Gastropoda 17 666 590 534

Bivalvia 28 666 972 898

Copepoda 1 333 34 60

Ostracoda sp A 56 1000 1944 1744

Ostracoda sp B 2 666 69 60

E-35

3Station no W-3-5 Date 30 Jul 85 Sample size (CONTINUED)

Taxa

Diastvlopsis spp

Diastvlopsis dawsoni

Svnidotea sp

Munna sp

Pleuroaonium rubicundum

Bathycopea daltonae

Gammaridea

Ampelisca agassizi

Ampelisca macrocephala

Eohaustorius spp

Eohaustorius sawveri

Lysianassidae Anonvx spp ()

Synchelidium shoemakeri

Photis parvidens

Photis sp juvenile

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxynius dabouis

Rhepoxynius abronius

Sympleustes subglaber

Caprellidae Nebalia pugettensis

Ophiuroidea

Number of taxa= 69

Mean number per sample

2 Mean numberm 518056

H= 351 SDV= 081

Total

number

1

2

2

1

1

1

1

3

14

4

1

1

1

1

12

12

10

19

6

10

6

5

1

6

49733

SDra

SR= 931

Frequency of Mean Standard

occurrence number deviation

() m^ m^

333 34 60

333 69 120

333 69 120

333 34 60

333 34 60

333 34 60

333 34 60

333 104 180

1000 486 120

666 138 120

333 34 60

333 34 60

333 34 60

333 34 60

1000 416 375

666 416 633

1000 347 120

1000 659 262

1000 208 00

1000 347 60

666 208 275

666 173 159

333 34 60

1000 208 104

Standard deviation (SD) 16333

170656

J= 057

E-36

Appendix Table F Benthic Invertebrate taxa collected off Willapa Bay Washington 30-32 July 1985

Cnidaria

Anthozoa

Nemertinea

Annelida

Polychaeta ^ Orbiniidae

Leitoscoloplos pugettensis (Johnson 1910)

Phylo felix Kingberg 1866 Scoloplos acmeceps Chamberlin 1919

Paraonidae

Aricidea nr suecica Aricidea suecica (Elaison 1920)

Paraonella platybranchia (Hartman 1961)

Spionidae

Boccardia pugettensis Blake 1979

Laonice cirrata (Sars 1851)

Minuspio cirrifera (Wiren 1883)

Polydora caulleryi Mesnil 1897

Polydora socialis (Schmarda 1861)

Prionospio cirriferalighti

Scolelepis spp Spio filicornis Muller 1776

Spiophanes berkeleyorum Pettibone 1962

Spiophanes bombyx (Claparede 1870) Megelonidae

Megelona hartmanae Jones 1978 ()

Megelona longicornishartmanae

Megelona sacculata Hartman 1961

Megelona spp ^ Cirratulidae

Chaetozone setosa Malmgren 1867 Cirratulidae sp A Tharyx multifilis Moore 1909

Tharyx secundus Banse and Hobson 1968

Tharyx sp indeterminate ^ Capitellidae

Decamastus gracilis Hartman 1963

Heteromastus filobranchus Berkeley and Berkeley 1932 Heteromastus filiformis (Claparede 1864) Heteromastus spp

Mediomastus ambiseta (Hartman 1947)

Med^-Otnastus californiensis Hartman 1944

Mediomastus sp Indeterminate

Notomastus lineatus Claparede 1870 Maldanidae

Axiothella rubrocincta (Johnson 1901)

Euclymene zonalis (Verrill 1874)

Maldanidae (unidentified)

Praxillella affinis (Sars 1872)

F-1

Ophelildae Travisla sp Indeterminate

Scalibregmidae Scalibregma Inflatum Rathke 18A3

Phyllodocidae

Anaitides groenlandica (Oersted 18A3)

Anaitides hartmanae (Blake and Walton 1977)

Eteone californica Hartman 1936

Eteone fauchaldi Kravitz and Jones 1979

Eteone longa (Fabricius 1780)

Eteone spp

Eulalia (Eumida) sanguinea Orsted 18A3

Paranaitides polynoides (Moore 1909)

Phyllodocidae (unidentified) Phyllodoce (Anaitides) longipes (Kinberg 1866)

Phyllodoce mucosa Orsted 1843

Phyllodoce multiseriata Rioja 1941 Aphroditidae

Aphrodite japonica Marenzeller 1879

Aphrodite negligens Moore 1905

Polynoidae

Halosydna brevisetosa Kinberg 1855 Halosydna spp Lepidonotus spp Polynoidae spp (juveniles) Tenoia kitsapensis Nichols 1969

Sigalionidae

Pholoe minuta (Fabricius 1780)

Sthenalais tertiaglabra Moore 1910 Thalenessa spinosa (Hartman 1939)

Hesionidae

Heteropodarke heteromorpha Hartman-Schroeder 1962

Podarkeopsis (Gyptis) brevipalpa (Hartman-Schroeder 1959) Pilargidae Syllidae

Autolytus sp Nereidae

Nereis zonata Malmgren 1867

Nereis spp

Glyceridae Glycera capitata Oersted 1843

Glycera convoluta Keferstein 1862 ltv

Glycera tenuis Hartman 1944

Glycera spp (juveniles) Goniadidae

Glycinde armigera Moore 1911

Glycinde picta Berkeley 1927 Glycinde sp-

Goniada maculata Oersted 1843

Goniada sp

Nephtyidae Nephtys caeca (Fabricius 1780)

Nephtys caecoides Hartman 1938

Nephtys californiensis Hartman 1938 (5raquov

Nephtys ciliata (0 F Muller 1776)

F-2

(Ms

^

^

^

^

^

^

Nephtys longosetosa Oersted 1843 Nephtys spp

Onuphldae Dlopatra ornata Moore 1911 Onuphls elegans (Johnson 1901) Onuphls (Nothria)Irldescens (Johnson 1901) Onuphls sp

Lumbrlnerldae

LumbrInerIs blclrrata Treadwell 1929

LumbrInerls callfornlensls Hartman 1944

LumbrInerIs cruzensls Hartman 1944

LumbrInerls latrellll Audouln and Mllne-Edwards 1843 Lumbrlnerls lut1 Berkeley and Berkeley 1945 Lumbrlnerls spp

Arabellldae

Notoclrrus callfornlensls Hartman 1968

Owenlldae

Galathowenla (Myrlochele) oculata Zaks 1923 Myrlochele heerl Malmgren 1867 Owenla collarls Hartman 1955

Owenla fuslformls delle Chlaje 1841 PectInarlldae

Fectlnarla callfornlensls Hartman 1941

Fectlnarla sp

AmpharetIdae

Ampharete acutIfrons (Grube 1860) Ampharete spp

Mlllnna ellsabethae Mclntosh 1922

Mlllnna sp (juvenile) Terebellldae

Amaeane occldentalls Hartman 1944

Flsta brevlbranchlata Moore 1923

Folyclrrus spp

Folyclrrus sp complex Sabelllldae

Chone sp Euchone nr Ej^ hancockl Banse 1970

Archlannellda

Hlrudlnea

Mollusca

Gastropoda Cephalaspldae

ScaphandrIdae Cyllchna attonsa (Carpenter 1864)

Felecypoda

Nuculanldae

Yoldla sclssurata (Dall 1887)

Mytllldae Modlolus spp

LucInldae

Luclnoma annulate (Reeve 1850)

Telllnldae

Macoma elImata Dunnlll and Coan 1968

Macoma expanse Carpenter 1864 TellIna modesta (Carpenter 1864)

F-3

Telllna nuculoldes (Reeve 1854)

Psammobildae

Garl callfornlca (Conrad 1837)

Solenldae

Sillqua sloat1 Hertleln 1961

Scaphopoda Dentalium sppbull

Arthropoda Pycncgonldea

Crustacea

Leptostraca

Nebalildae

Neballa pugettensls (Clark 1932)

Nebalia spbull

Ostracoda

Ostracoda sp A Ostracoda sp B

Copepoda Cuntacea

Dlastylidae Dlastylls sp Dlastylopsls dawsonl Smith 1880 Diastylopsis spp

Oxyurostylls paciflea Zimmer 1936 Lampropidae

Hemilamprops callfornlca Zlmraer 1936

Leuconldae

Leucon subnaslca Given 1961

Nannastacldae

Camplyapsls spbull

Isopoda Anthurldae

Hallophasma gemlnata Menzles and Barnard 1959 Idoteldae

Edotea subllttoralls Menzles and Barnard 1959

Idotea sp

Synldotea blcusplda Owen 1939

Synldotea sp

Munnldae

Munna sp Munnogonlum tlllerae (Menzles and Barnard 1959)

Pleurogonlldae Pleurogonlum rublcundum G-O- Sars 1863

SpaeromatIdae

Bathycopea daltonae Menzles and Barnard 1959

laeroma oregonensIs (Dana 1854-1855) Amphlpoda

Ampellscldae Ampellsca agasslzl (Judd 1896)

AmpelIsca macrocephala Llljeborg 1851 AmpelIsca spp- (juveniles) AmpelIsca sp

^

^

^

F-4

_

^

^

^

^

^

Atylidae Atylus trldens (Alderman 1936)

Corophlldae Corophium spp

Gammaridae

Anisogammarus pugettensls (Dana 1853)

Haustoriidae

Eohaustorius sawyerl Bosworth 1973

Eohaustorius spp Isaeidae

Cheriphotls spbull Cheirimedeia sp Photis brevlpes Shoemaker 19A2 Photis macinerneyi Conlan 1983 Photis parvidons Conlan 1983

Photis spp (juveniles) Protomedeia prudens Barnard 1966 Protomedeia spp (juveniles)

Ischyroceridae Ischyrocerus pegalops Barnard 1962 Ischyrocerus sp Ischyrocerus spp (juveniles)

Lysianassidae

Oedicerotidae

Synchelidium shoemakeri Mills 1962

Synchelidium sp (juvenile) Phoxocephalidae

Foxiphalus spp (juveniles) Rhepoxynius abronlus (Barnard 1960) Rhepoxynius dabouis (Barnard 1960) Rhepoxynius lucubrans (Barnard 1960) Rhepoxynius spp

Pleustidae

Parapleustes den Barnard 1969

Sumpleustes subglaber Barnard and Given 1960 Podoceridae

Dulichia monacantha Metzger 1875 Dulichia spp

Caprellidae Decapoda

Decapoda larvae Natantia

Reptantia

Callianassidae

Callianassa californiensis Dana 185A

Paguridae

Pinnotheridae

Pinnixa occidentalis Rathbun 1893

Pinnixa spp raegalops

Porcellanidae

Echinodermata

Ophiuroidea Amphiodia sppbull

Holothuroidea

F-5

Page 9: BenthicInvertebrates and Demersal Fishes atanInterim

Weight tray

Figure 2mdashBox corer (Gray-OHara modification of a standard box corer Pequegnat et al 1981) used for benthic invertebrate survey in Willapa Bay For deeper penetration in hard sediments weights can be attached to the shelves located on opposite sides

densities [numberhectare(ha)] were estimated using distance fishedj fishing

width of the trawl and catch data Descriptive summaries of each sample

effort include the following (1) a species list for each trawl (2) the number

and weight of fishes and crabs captured (total and by species) (3) numberha

(total and by species) (A) weight (gha) (total and by species) and (5) four

community structure indices [diversity index (H and SDV) species richness

(SR) and species evenness (J)]

Diversity was calculated for each trawl effort using the Shannon-Weaver

Diversity Index (Shannon and Weaver 1963)

S

H = - I Pilog2Pi ial

where H =gt Shannon-Weaver Diversity Index Pi = Xan (Xa is the number of

individuals of a particular species in a sample and n is the total number of

all individuals in the sample) and S raquo number of species

A second diversity index the Simpson Diversity Value (Simpson 19A9) was

also calculated for each trawl sample

S

SDV = 1 - H Pi2 i-1

Diversity values are sensitive to two components the number of species in

a sample (species richness) and the distribution of individuals among species

(evenness) (Lloyd and Ghelardi 196A) Species richness (SR) was estimated using

Margalefs formula (Margalef 1958)

SR = (S-1) ln(N)

where S = number of species and N = total number of individuals at the station

Species evenness was described using the Evenness Index (Pielou 1966)

J= H log2S

where J=laquo Evenness Indexgt H= Shannon-Weaver Diversity Index and S = number of

species-

Benthic Invertebrates

Benthic data were analyzed with the aid of a program on the NWAFC B7800

computer The three samples collected at each station were treated as

replicates enabling calculation of a mean numberm^ and a standard deviation

for each species- The program also calculated the number of species mean

number of invertebratessample and standard deviation and mean number

of invertebratesm^ and standard deviation The community structure indices

used in the trawling analyses were also calculated for the benthic

invertebrate data- Cluster analysis using the Bray-Curtis dissimilarity

index with a group averaging fusion strategy (Clifford and Stephenson 1975)

was used to identify station groupings that had similar species and densities-

A 0-5 dissimilarity value was considered a significant difference between

groups- The mean numberm^ (untransformed) for each species per station was

used in this analysis- Species which had mean densities lt10m^ were excluded

from the analysis to reduce the effect of rare species-

Sediments

Mean grain size (phi) percent silt-clay and percent organic matter were

calculated for each station (Appendix Table C) Within-area variability

tended to be low so no statistical analysis was performedshy

RESULTS

Fish and Vagile Epifauna

The three trawl tows captured 10394 fish represented by 15 species

(Appendix Tables D and E) Pacific tomcod (Microgadus proximus) was the

dominant species captured at all three stations accounting for 95diams45regof the

total catch (Table 1) Densities (numberha) decreased dramatically as depth

increased with a 93956 decrease in densities between Stations W-1 and W-2 and

an 84656 decrease between W-2 and W-3 Conversely diversity (H and SDV)

increased as depth increased because of the reduced numbers of Pacific tomcod

and whitebait smelt (Allosmerus elongatus) at the deeper stations This

condition made the number of species in the sample nonproportional to the

number of individuals within the species

Benthic Invertebrates

A total of 229 taxa (Appendix Table F) with a mean density of 16113m2

were identified at the Willapa Bay site (Table 2) Highest invertebrate

densities were found along the 20-fathom contour (25885m^) densities

gradually decreased at the 22- (15440m2) 24-fathom transects (7014m2)

The highest invertebrate density was 35045m^ at Station W-1-2bull Mean taxa

numbers ranged from 80 to 85 and were similar for all transects Diversity

values (H and SDV) showed a mild inverse relationship to Invertebrate

densities with some higher diversity values associated with lower

invertebrate densities- The mildness of the relationship was due to the

domination of Owenia fusiformis (Table 3) a tube-dwelling polychaete worm at

all stations except W-3-4 (0_^ fusiformis 805m2 mdash Spiophanes bombyx

l847m2) and W-3-5 (0 fusiformis l622m2 mdash Spiophanes bombyx l545m2)

The highest density of 0- fusiformis was 20986m^ at station W-1-2

10

Table 1mdashCatch summaries (numberhectare and weighthectare) and diversity indices (by species) for trawl tows near Willapa Bay Washington 1 August 1985shy

Trawl W - 1 Trawl W - 2 Trawl W - 3

(depth 20 fathoms) (depth 22 fathoms) (depth 24 fathoms)

Species Nobullha gha Noha gha Noha gha

Big skate 13 84905

Longfin smelt 13 54 - - -

Whitebait smelt 867 7137 54 589 5 81

Plainfin

midshipman 1 41 - -

Pacific tomcod 29067 95838 1633 4418 200 535

Pacific staghorn sculpin 6 844 - - -

Warty poacher 6 60 7 88 -

Showy snailfish 13 210 - - -

Pacific sanddab - - 16 1838 16 2465

Speckled sanddab - - - - 16 124

Butter sole 130 6498 65 4454 22 1470

Slender sole - - - - 5 303

English sole 51 2156 36 1737 11 422

Sand sole 6 1873 7 1105 -

Dover sole 35 273 38 2112 11 297

Dungeness crab ^8 4610 mdash mdash mdash mdash

Totals 30258 204499 1856 16341 286 5697

Diversity Indices

H 030 082 169

SDV 008 022 050

SR 091 072 122

J 008 027 056

11

Table 2mdashGeneral description of the benthic invertebrate community sampled with a box corer off Willapa Bay Washington 30-31 July 1985 Grand totals were calculated by combining replicates from all stations

Station amp

depth (ft) No of

taxa

Mean no

m^ St dev

m^ H SDV SR J

W-1-1 121

W-1-2 123

W-1-3 123

W-l-A 120

W-1-5 120

70

98

75

85

71

25892

35045

23427

26174

18889

2601

11266

6883

15472

4890

299

241

328

289

281

076

036

081

071

067

774

1052

839

941

814

049

036

053

045

046

Mean total 80 25885

W-2-1 133

W-2-2 133

W-2-3 135

W-2-4 133

W-2-5 132

77

106

78

90

71

21993

24917

10670

11875

7747

6223

16111

1975

1039

1574

226

298

296

322

315

050

073

067

070

070

868

1183

959

1106

908

036

044

047

050

051

Mean total 85 15440

m

W-3-1 1U5

W-3-2 1A5

W-3-3 1A6

W-3-A 141

W-3-5 144

86

108

70

76

69

8816

11177

4910

4986

5181

3187

3769

1595

1617

1707

310

355

379

384

351

067

074

084

083

081

1097

1325

951

1032

931

048

053

062

061

057

Mean total 82 7014

Grand total 229 16113 11122 335 073 2045 043

12

Table 3 Summary of benthlc invertebrates collected near Wlllapa Baygt Washington 30-31 July 1985 Only dominant taxa from each category are shown

O

Taxon Total number Mean nom^

FOLTCHAETA

Owenia fusiformis 34A20 7968 Splophanes bombyx 3368 780 Spiophanes berkeleyorum 983 228 Onuphis sp indet 912 211 Onuphis iridescens 364 84 Chaetozone setosa 675 156 Leitoscoloplos pugettensis 599 139 Nephtys sp juv 459 106 Nephtys caecoides 264 61 Miscellaneous 3650 845

Total 45795 10600

CUMACEA

Diastylopsis dawsoni 7416 1717 Diastylopsis sp juv 4976 1152 Diastylopsis sp 687 159 Leucon subnasica 673 156 Miscellaneous 19 4

Total 13771 3188

AMPHIPODA

Photis sp juv 534 124

181 42Photis parvidons 107 25Photis brevipes 477 110Rhepoxynius sp

Rhepoxynius dabouis 271 63

Rhepoxynius abronius 202 47

Protomedeia sp juv 266 61 204 47Protomedeia prudens

Miscellaneous 973 225

Total 3215 744

OTHER

Bivalvia 4339 1004 Miscellaneous 2489 576

Total 6828 1581

Grand total 69609 16113

13

Cluster analysis of the data revealed two strong cluster groups (Fig- 3)shy

A high invertebrate density group (18000 - 35000m2) represented by the

20-fathom transect stations plus the two northern 22-fathom transect stations-

A moderate density group (5000 - 12000m2) was represented by the three

southern 22-fathom transect stations and all but one station of the 24-fathom

transect The latter station W-3-2 did not fit into any cluster group

Sediments

The Willapa Bay sediments were primarily fine sand mean grain size was

377 phi (Appendix Table C) Samples were moderately high in silt-clay (mean

value 23A) and low in organic matter (mean value lTs)

DISCUSSION

Fish and Vagile Epifauna

The 1985 Willapa Bay study was designed primarily to obtain additional

information on the benthie infaunal communities in the area of the proposed

interim disposal site Trawl surveys provided a species list and relative

abundances of larger organisms in the study area However to adequately

describe the fish and crab fauna replicate samples should be taken from each

depth contour to ensure statistical validity

Theoretically maximum diversity exists where there are many species

each represented by one Individual and minimum diversity exists when all

individuals belong to one species neither situation exists in a natural

community Although Trawl 1 had the highest number of species diversity was

low due to the unbalanced proportion of Pacific tomcod and whitebait smelt

(Table 1) Without more data It Is difficult to speculate why such great

differences occurred among stations- Since the greatest numbers in Trawl 1

Nautical miles

) 1

I N

I 46deg 44- ^

I l-~i-1^

1 i

Dredge disposal li site 46deg 40

22fm ( I

24fm 20fm

46deg 36

Density(numberm

5000-12000

18000-35000

124deg 10

Figure 3mdashLocations of benthic invertebrate cluster groups identified off Willapa Bay Washington

15

were due to Pacific tomcod which are epibenthic feeders it may be assumed

that they were near shore feeding on epibenthic prey

Benthic Invertebrates

The Willapa Bay benthic invertebrate community was high in both number of

taxa and density The dominant species was Owenia fusiformis The

distribution of this tube-dwelling worm was probably strongly affected by

sediment stability Oliver et al(1980) found tube-building polychaetes

abundant only in deeper water (gtA6 ft) where sediment disturbance due to wave

action is minimal Emmett et al(1987) in their September 198A survey off

Tillamook Bay found low densities of 0^^ fusiformis at 60 ft with highest

densities at 80 and 90 ft The Willapa Bay survey transects began at the 20shy

fathom depth contour and showed species and densities similar to the high

density samples off Tillamook Bay High densities of 0 fusiformis were also

found off Grays Harbor Washington (Pearson et al 1985) adjacent to and

north of Willapa Bay

Tillamook Bay Willapa Bay and Grays Harbor estuaries have extensive mud

flats with macroalgae and eelgrass Trawl tows at the Tillamook Bay and

Willapa Bay interim offshore disposal sites collected large amounts of

estuarine macroalgae Perhaps the export of these estuarine materials

enhances the nearshore benthic community The densities of benthic

invertebrates adjacent to these three estuaries are much higher than typically

found in the Oregon-Washington nearshore environment (Lie and Klsker 1970

Hancock et albull 198A Emmett et al 1987) They may represent unique marine

benthic communities linked to adjacent estuarine primary productionshy

16

Sediments

Sediments were typical of nearshore environments that are exposed to

waves and ocean swells (Fager 1968) Although sediments have a significant

effect on the distribution and abundance of benthic invertebrates (Gary 1965)

wave disturbance also plays an important role in determining the nearshore

benthic invertebrate community (Oliver et al 1980) Since invertebrate

densities at Willapa and Tillamook bays were much greater than those found at

other disposal sites along the Oregon coast and sediment structure was similar

(Emmett et al- 1987) sediment characteristics alone probably do not provide

enough information to predict either the benthic invertebrate community or

densities along the Oregon-Washington coast

SUMMARY

The Willapa Bay interim disposal site trawl-samples enabled a listing of

the larger benthic organisms and their relative abundances within the study

area However to adequately describe the fish and crab fauna replicate

samples should be taken from each depth contour to ensure statistical

validity

The benthic invertebrate community was high in both number of species and

densities of individuals The dominant species was the tube-dwelling worm

Owenia fusiformis Benthic invertebrate densities were much higher than

typically found in the Washington-Oregon nearshore environment

Sediments were typical of Washington-Oregon nearshore environments that

are exposed to waves and ocean swells Sediments were composed of clean fine

sands with moderate amounts of silt-clay and low amounts of organic matter

The density of benthic invertebrates off Willapa Bay resembled those off

the adjacent Grays Harbor Washington and off Tillamook Bay Oregon These

17

three estuaries have extensive mud flats with macroalgae and eelgrasS- The

cause of the high invertebrate densities is unknown but the contribution of

primary production from the adjacent estuary is a probable factor The areal

extent of the high Invertebrate densities off Willapa Bay Grays Harbor and

Tillaraook Bay is not known and should be defined We recommend that these

areas not be used for the disposal of dredged materials until after more

intensive studies and then only if it can be shown that there are no severe

impacts to the estuarine and marine fisheries

This report does not constitute NMFSs formal comment under the Fish and

Wildlife Coordination Act or the National Environmental Policy Act

18 (laquoN

ACKNOWLEDGMENTS ^ ltbullraquo

This study was funded by the EPA Region 10) and the NMFS The Portland

District) COE) Troutdale) Oregon) sediment laboratory provided the sediment

analyses- Special thanks go to Travis Coley) NMFS) and to Howard Jones)

Marine Taxonomic Services) CorvalliS) Oregon

19

LITERATURE CITED

Gary A G Jr

1965 Preliminary studies on animal-sediment interrelationships off the central Oregon coast Mar Tech Soc Ocean Sci Ocean Engineering 1100-110

Cliffordraquo H T and W Stephenson 1975 An introduction to numerical classification Academic Press New

York 229 p

Emmett R L T C Coley G T McCabe and R J McConnell 1987 Demersal fishes and benthic invertebrates at four interim dredge disposal sites off the Oregon coast US Dept Commer Natl Oceanic Atmos Admin Natl Mar Fish Serv Northwest and Alaska Fish Cent Seattle WA 69 p plus Appendices (Report to US Army Corps of Engineers Contract DACW57-85-F-0210)

Fager E W

1968 A sand-bottom epifaunal community of invertebrates in shallow water Limnol Oceanogr 13448-A64

Hancock D R P 0 Nelson C K Sollitt and K J Williamson 1984 Coos Bay offshore disposal site investigation Interim Report Phase 1 February 1979-March 1980 61 p plus Appendices (Report to U S Army Corps of Engineers Portland District PO Box 2946 Portland OR 97208)

Lie U and D S Kisker

1970 Species composition and structure of benthic infauna communities off the coast of Washington J Fish Res Bd Canada 272273-2285

Lloyd M and R J Ghelardi

1964 A table for calculating the equitability component of species diversity J Anim Ecol 33217-225

Margalef R

1958 Information theory in ecology Gen Syst 336-71

Morton J W

1977 Ecological effects of dredging and dredge spoil disposal a literature review U-S Dept Int Fish Wildl Serv Tech Paper 94 33 p

Oliver J S p N Slattery L- W Hulberg and J- W Nybakken 1980 Relationships between wave disturbance and zonation of benthic

invertebrate communities along a subtidal high-energy beach in Monterey Bay California Fish Bull US 78437-454

20

Pearson W H D L- Woodruff P Wilkinson J S- Young and S L Kiessger

1985 Ocean surveys to select and characterize an ocean disposal site off Grays Harbor Washington 27 p plus Appendices (Draft Data Report to ^ US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 9812A)

Pequegnat W E L H Pequegnat B M James E A Kennedy R R Fay and A D Fredericks

my

1981 Procedural guide for designation surveys of ocean dredged material ^ disposal sites Tech Report EL-81-1 to Chief of Engineers U S Army Washington D C 20314 268 p plus Appendices

Pielou E L 1966 The measurement of diversity in different types of biological

collections J Theor Biol 13131-144

Shannon C E and W Weaver 1963 The mathematical theory of communication Univ Illinois Press

Urbana 117 p

Shapiro and Associates Inc 1985 Willapa Bay interim ocean dredge material disposal site designation

study 24 p plus Appendices (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124)

Simons D D 1984 Razor clam study Willapa Bay ocean disposal site Washington ^

Dept Fish 10 p plus Appendix (Report to US Army Corps of Engineers Seattle District PO Box C-3755 Seattle WA 98124 Contract DACW 67-84-1693)

Simpson E H 1949 Measurement of diversity Nature 163688 ^

21

APPENDIX

Data Tables

Appendix Table AmdashWlllapa Baygt Washington Interim ocean disposal site

sampling stations mdash Loran-C coordinates and depth 30-31 July and 1 August 1985

Station Coordinates Depth (ft)

20-fathom contour BENTHIC

W-1-1 119073 28044A 121

W-1-2 119115 280447 123

W-1-3 119147 280435 123

W-1-4 119200 280430 120

W-1-5 119255 280430 120

22-fathom contour BENTHIC

W-2-1 119100 280440 133

W-2-2 119150 280430 133

W-2-3 119175 280425 135

W-2-4 119220 280415 133

W-2-5 119265 280415 132

24-fathom contour BENTHIC

W-3-1 119113 280424 145

W-3-2 119160 280421 145

W-3-3 119203 280402 146

W-3-A 119250 280400 141

W-3-5 119290 280395 144

20-fathom contour TRAWL

W-1 119118 280447 - 119104 280446 123 - 125

22-fathom contour TRAWL

W-2 119140 280422 - 119113 280424 135 - 139

24-fathom contour TRAWL

W-3 119104 280414 - 119111 280415 147 - 146

A-1

Appendix Table B---Individual lengths and weights for fish and Dungeness crab collected with an 8-m trawl off Willapa Bay Washington 1 August 1985 Mass data are included where there were more than 50 individuals of each species

Trawl W-1

Gear 8-ra trawl

Date 1 August 1985 Depth 123 ft

Distance 2067 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Big skate 262 262 166

lAlO 0 26000

210 210 77

377 377 502

Longfin smelt 103 84 7

45 39 1

105 90 8

48 40 1

Whitebait smelt 125 106 10

110 93 10

111 94 7

94 79 4

121 107 11

122 105 9

108 90 6

115 95 8

121 102 10

119 100 8

114 96 7

122 104 9

123 102 10

120 103 8

111 94 7

120 101 9

123 104 11

118 99 8

115 99 8

130 110 11

136 116 13

137 118 13

130 111 12

105 87 6

123 103 9

110 93 6

B-1

Species

Whitebait smelt

Plainfin midshipman

Pacific tomcod

Total

length (mm)

119

121

95

135

117

121

111

113

llA

125

119

127

137

120

115

117

120

117

113

115

116

122

113

127

113

86

77

78

82

82

78

72

86

77

84

86

70

78

72

71

75

67

77

76

87

Standard

length Weight

(mm) (8)

100 11

102 9

80 4

116 13

99 8

104 9

95 6

96 8

98 8

105 10

100 8

106 9

116 14

101 9

98 7

98 8

101 9

100 8

96 7

96 7

99 8

105 9

95 7

109 11

100 13

75 5

67 4

66 4

73 5

71 5

66 4

62 3

75 5

66 4

75 5

76 5

60 3

68 4

61 4

63 3

65 3

58 3

67 4

65 4

78 5

B-2

Total Standard

length length Weight

Species (nun) (mm) (g)

Pacific tomcod 7A 64 4

87 76 5

67 58 3

73 65 4

71 63 3

63 54 2

82 70 5

70 60 3

76 66 3

75 66 4

73 64 3

82 71 5

75 65 3

72 62 4

92 81 6

80 71 4

77 67 4

76 66 4

6A 55 2

72 62 4

66 57 2

81 71 5

67 58 3

73 65 4

87 76 6

64 55 2

69 60 3

61 51 2

82 71 5

58 48 2

86 75 5

77 67 4

Pacific staghorn sculpin 235 199 175 tf tt bullbull

196 167 91

Warty poacher 115 99 9

bullbull bullbull 126 110 10

Showy snailfish 138 121 41

107 95 21 bullbull 50 45 2 bullt bull

56 49 2

Butter sole 42 34 1

40 32 1

195 158 71

224 182 124

m

124 100 18

131 104 20

B-3

bullbull

Species

Butter sole

English sole

Total

length (mm)

132

175

132

44

157

175

201

155

215

136

47

200

142

134

133

49

198

158

142

210

195

220

134

198

220

271

130

160

139

195

155

197

252

115

181

172

188

96

163

172

171

170

175

170

204

181

Standard

length Weight

(mm) (g)

106 20

141 47

108 20

36 1

128 35

142 50

169 69

124 34

183 99

110 23

39 1

162 68

115 24

114 22

105 21

39 1

157 74

126 35

114 24

171 88

159 66

179 98

107 21

159 74

175 93

219 223

105 21

133 35

112 24

159 74

126 33

158 68

204 157

93 12

142 57

146 42

157 56

79 8

138 35

145 44

145 42

141 42

147 41

140 42

171 73

155 47

B-4

Total Standard

length length Weight

Species (mm) (mm) (g)

English sole 157 133 33 tt 185 160 53 it ft

170 145 42 it tt

162 137 33 it tt

173 147 46

Sand sole 246 200 141 it tt

335 273 449

Dover sole 95 80 7 81 68 5 li It

76 63 4 bulli ti

115 96 12 tt tt

98 80 8 tt tt

75 63 3

Dover sole 101 84 9 tt tt

77 60 3 it it

119 101 15 it tt

92 76 7 it tt

115 98 13

Dungeness crab 133 362 Females it tt

13 1 it tt

118 280 Females tt tt

16 1 tt tt

16 1 ft tt

14 1 tt tt

15 1 tt tt

14 1 ti ft

135 369 Females it ft

14 1 tt It

14 1 tt tt

10 1 tt It

17 1 tt ft

15 1 tt tt

144 430 Females

Supplemental (not individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Whitebait smelt 223 1815 81

Pacific tomcod 9104 29989 33

B-5

Appendix Table BmdashContinued

Trawl W-2

Gear 8-m trawl

Date 1 August 1985 Depth 135 ft

Distance 2917 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 132 115 12

123 103 9

131 110 11 102 85 4

131 111 12

128 106 11

130 110 12 1A2 120 17

125 105 11

128 106 11

118 100 9

126 109 10

129 110 11

124 107 11

119 101 9

1A7 125 16

120 100 9

132 112 11

lAO 120 14

126 108 11

M

122 103 10

130 112 12

122 105 10

115 99 9

Pacific tomcod 60 50 2

66 57 2

65 54 2

85 73 5

79 68 4

62 56 2

64 53 2

81 68 4

70 59 3

75 66 3

63 52 2

68 57 2 72 63 3

B-6

Species

Pacific tomcod

Warty poacher bullbull tlaquo

bullbull bull

Pacific sanddab bullbull bull

bullbull bull

bullt bullbull

Total

length (mm)

76

71

75

80

77

73

82

66

76

75

63

75

71

69

70

73

70

80

73

65

73

67

6A

58

72

67

65

60

65

63

70

Ik

12

62

63

71

72

83

61

128

1A7

136

215

229

235

221

Standard

length Weight

(mm) (g)

65 4

60 3

67 3

67 4

64 4

65 3

70 5

57 2

66 4

67 3

52 2

66 4

62 3

58 3

61 3

64 3

59 3

70 4

64 3

54 2

63 3

57 2

55 2

50 2

62 3

55 2

57 2

51 2

56 2

53 2

61 3

63 3

60 3

53 2

53 2

60 3

62 3

74 4

52 2

110 11

127 16

117 12

181 101

193 124

197 133

184 115

B-7

Total Standard

length length Weight

Species (mm) (mm) (8)

Pacific sanddab 201 168 83

241 200 133

225 191 128bull

Butter sole 257 207 169

23141 115 245 200 162

bullbull 252 209 151 M bullbull

210 168 90

214 174 92 1 I

222 181 112

206 163 76

215 175 99

132 110 21

200 160 74

223 181 103

133 107 20

128 102 18

230 191 114 bullbull 127 103 17

118 95 14

143 116 24

131 107 19

124 99 16

255 208 156

145 117 26

183 148 59

150 121 29

206 165 78

207 167 84

220 179 97 M bullbull

117 95 14

138 112 23

English sole 181 154 48

167 141 36

176 148 43 169 142 34

182 153 43

171 145 40

200 170 68

181 153 43

205 174 66

190 159 52

172 147 37

173 146 40 61

212 185

199 167

77

B-8

Total Standard

length length Weight Species (mm) (mm) (8)

English sole 159 133 30 180 152 48

Sand sole 285 238 234 bullbull bull 226 183 99 bullbull bull

259 211 158

Dover sole 252 216 157 bullbull bullbull

146 122 24

99 82 7

105 87 10

148 125 25

250 210 127

112 94 10

105 88 9

275 234 206

282 238 223

108 90 10

104 97 12

97 82 6

70 57 2

171 144 38

105 89 10 M

203 173 63

Supplemental (not Individually measured and weighed)

Mass Mass Mean

count weight (g) weight (g)

Pacific tomcod 67A 1816 27

B-9

Appendix Table BmdashContinued

Trawl W-3

Gear 8-m trawl

Date 1 August 1985 Depth 146 ft

Distance 1214 ft

Total Standard

length length Weight

Species (mm) (mm) (8)

Whitebait smelt 146 126 15

Pacific tomcod 74 62 3

62 51 2

61 51 2

61 51 2

61 51 2

56 46 1

70 59 3

83 71 5

66 55 3

56 46 2

79 65 4

54 45 1

59 49 2

74 63 3

75 63 4

80 70 4

64 53 2

69 60 3

63 54 2

66 57 2

71 61 3

72 62 3

79 68 4

64 54 2

71 61 3

62 51 2

79 68 4

56 45 1

67 57 2

76 64 4

70 60 3

66 54 2

72 62 3

75 65 3

75 63 3

69 59 3

B-10

Species

Pacific tomcod

Pacific sanddab

Speckled sanddab t bulllaquo

bullbull ti

Butter sole

Slender sole English sole

M 1

Dover sole

1^

Total

length (mm)

57

258

221

223

65

68 131 235 2U 122 1A3 200 160 111 178 104

Standard

length Weight

(mm) (8)

47 2

222 183

188 129

191 14

56 2

57 2

114 19

188 136 173 96

98 15

115 25 161 56

137 31 151 47 148 46

86 9

B-11

Appendix Table C--Willapa Bay benthic sampling stations sediment structure analysis-

Date Mean grain Percent Percent

Station (1985) size (phi) silt-clay organic

matter

20-fathom contour

3-8 267 27

W-1-2 31 July 3-8 163 17

W-1-3 31 July 3-6 112 17

W-l-A 30 July 3-9 16

W-1-1 31 July

2A7

W-1-5 30 July 30 A9 12

22-fathom contour

W-2-1 31 July A3 A38 19

21W-2-2 31 July A-l 360

W-2-3 31 July Al 280 18

lAW-2-A 30 July Al 276

W-2-5 30 July A-O 16268

2A-fathom contour

W-3-1 31 July A2 353 21

W-3-2 31 July 16 00 15

W-3-3 31 July AO 238 lA

W-3-4 30 July AO 229 12

W-3-5 30 July AO 2A0 13

377 23A 168Mean

Standard devlatIon 065 1116 039

C-1

Appendix Table D--Fish species collected with an 8-m trawl off Willapa Bay

Scientific name

Phylum CHORDATA

Class Chondrichthyes Family Rajidae

Raja binoculata

Class Osteichthyes Family Osmeridae

Allosmerus elongatus

Spirinchus thaleichthys Family Batrachoididae

Porichthys notatus

Family Gadidae Microgadus proximus

Family Cottidae Leptocottus armatus

Family Agonidae

Ocella verrucosa

Family Cyclopteridae Liparis pulchellus

Family Bothidae Citharichthys sordidus

Citharichthys stigmaeus

Family Pleuronectidae Isopsetta isolepis

Lyopsetta exilis

Microstomus pacificus

Parophrys vetulus

Psettichthys melanostictus

Common name

Cartilaginous fishes Skates

Big skate

Bony fishes Smelts

Whitebait smelt

Longfin smelt Toad fishes

Plainfin midshipman Cods and hake

Pacific tomcod

Sculpins Pacific staghorn sculpin

Poachers

Warty poacher Snailfishes

Showy snailfish Lefteye flounders Pacific sandab

Speckled sandab Righteye flounders

Butter sole

Slender sole

Dover sole

English sole Sand sole

D-l

Appendix Table EmdashDescriptive summary of the benthic invertebrates at 15 sampling stations off Willapa Bay Washington 30-31 July 1985

3Station no W-1-1 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

) rsr m^

Nemertinea 15 1000 520 375

Leitoscoloplos puaettensis 76 1000 2638 1084

Scoloplos acmeceps 54 1000 1875 1160

Paraonidae 1 333 34 60

Aricidea nr A suecica 8 1000 277 216

Prionospio cirrifera 18 1000 625 312

Spiophanes berkelevorum 128 1000 4444 1496

Spiophanes bombvx 12 1000 416 454

Magelona sacculata 3 666 104 104

Maaelona hartmanae 2 333 69 120

Magelona longicornisXhartmanae 2 333 69 120

Chaetozone setosa 47 1000 1631 592

Heteromastus filobranchus 7 666 243 262

Mediomastus ambiseta 12 666 416 633

Mediomastus sp indet 2 333 69 120

Notomastus lineatus 7 1000 243 159

Euclvmene zonalis 1 333 34 60

Eteone fauchaldi 3 666 104 104

Eteone sp iuvenile 1 333 34 60

Eteone californica 10 666 347 300

Polvnoidae sp indet 2 333 69 120

Pholoe minuta 33 1000 1145 375

Sthenalais tertiaglabra 9 1000 312 180

Thalenessa spinosa 5 666 173 216

Hesionidae 4 666 138 159

Nereis zonata 2 666 69 60

Glvcera spp iuvenile 19 666 659 677

Glvcinde armigera 46 1000 1597 216

Goniada maculata 3 666 104 104

Nephtys caecoides 20 1000 694 469

Nephtys ciliata 1 333 34 60

Nephtys sp iuvenile 40 1000 1388 433

Diopatra ornata 1 333 34 60

Onuphis iridescens 17 1000 590 469

Onuphis sp indet 23 1000 798 573

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3226 1000 112013 38860

Ampharete acutifrons 10 1000 347 262

Polycirrus sp complex 21 1000 729 00

Gastropoda 11 1000 381 240

Bivalvia 707 1000 24548 7569

E-1

Station no W-1-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Copepoda 152 1000 5277 573

Diastvlis sp iuvenile 1273 1000 44201 14503

Diastvlopsis dawsoni 881 1000 30590 22676

Leucon subnasica 177 1000 6145 2761

Svnidotea bicuspida 6 1000 208 180

Svnidotea sp 15 1000 520 375

Pleurogonium rubicundum 6 666 208 275

Ampelisca macrocephala 10 1000 347 216

Eohaustorius spp 3 333 104 180

Lvsianassidae juvenile 1 333 34 60

Svnchelium sp juvenile 1 333 34 60

Photis parvidens 20 666 694 677

Photis sp juvenile 73 1000 2534 1910

Protomedeia prudens 34 1000 1180 365

Protomedeia spp juvenile 35 1000 1215 693

Ischvrocerus spp juvenile 8 333 277 481

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 29 1000 1006 573

Rhepoxvnius dabouis 16 1000 555 159

Rhepoxvnius abronius 7 1000 243 60

Dulichia monacantha 12 1000 416 104

Caprellidae 1 333 34 60

Nebalia puaettensis 4 666 138 120

Decapoda larvae 7 666 243 262

Ophiuroidea 46 1000 1597 661

Holothuroidea 7 1000 243 60

Ifumber of taxa= 70

Mean number per sample 248567 Standard deviation (SD) 24971

Mean numberm^ 2589236 SDm^ 260119

H= 299 SDV= 076 SR= 774 J= 049

E-2

3Station no W-1-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 199

Polychaeta 1 333 34 60

Orbiniidae 1 333 34 60

Leitoscoloplos pucrettensis 33 1000 1145 477

Orbinia (Phvlo) felix 1 333 34 60

Scoloplos acmeceps 12 666 416 375

Aricidea nr A suecica 2 333 69 120

Polvdora socialis 1 333 34 60

Minuspio cirrifera 2 333 69 120

Prionospio cirrifera 5 666 173 159

Spiophanes berkelevorum 39 1000 1354 1816

Spiophanes bombvx 69 1000 2395 1721

Maaelona sacculata 3 666 104 104

Haaelona hartmanae 6 666 208 180

Chaetozone setosa 84 1000 2916 721

Tharvx multifilis 1 333 34 60

Heteromastus filobranchus 8 666 277 318

Heteromastus spp 2 333 69 120

Mediomastus ambiseta 1 333 34 60

Mediomastus sp indet 3 666 104 104

Notomastus lineatus 9 1000 312 104

Phvllodoce hartmanae 3 333 104 180

Anaitides aroenlandica 2 333 69 120

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 1 333 34 60

Eteone spp 1 333 34 60

Eteone sp juvenile 5 666 173 159

Halosvdna brevisetosa 1 333 34 60

Pholoe minuta 15 666 520 477

Sthenalais tertiaglabra 17 666 590 627

Thalenessa spinosa 6 666 203 208

Hesionidae 1 333 34 60

Autolvtus sp 1 333 34 60

Syllis sp indet 1 bull333 34 60

Glycinde armicjera 26 1000 902 513

Glycinde sp juvenile 14 666 486 524

Goniada maculata 2 666 69 60

Nephtys caeca 2 666 69 60

Nephtys caecoides 3 333 104 180

Wephtys spp 2 333 69 120

Nephtys sp juvenile 21 666 729 650

Onuphis iridescens 30 1000 1041 650

Onuphis sp indet 25 666 368 945

Lumbrineris bicirrata 7 1000 243 60

E-3

station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard number occurrence number deviation

() m^ m^

Lumbrineris luti 2 666 69 60

Arabellidae 1 333 34 60

Mvriochele heeri 3 333 104 180

Owenia fusiformis 6044 1000 209861 52180

Ampharetidae 1 333 34 60

Ampharete acutifrons 6 1000 173 60

Polvcirrus sp complex 9 666 312 275

Amaeana occidentalis 2 333 69 120

Hirudinea 1 333 34 60

Gastropoda 4 666 138 120

Cvlichna attonsa 3 333 104 180

Bivalvia 412 666 14305 12704

Modiolus spp 12 333 416 721

Lucinoma annulata 11 333 381 661

Macoma elimata 2 333 69 120

Macoma expanse 28 333 972 1683

Tellina modesta 29 333 1006 1744

Tellina nuculoides 2 333 69 120

Siliqua sloati 5 333 173 300

Gari californica 2 333 69 120

Copepoda 2 333 69 120

Ostracoda sp A 12 1000 416 375

Ostracoda sp B 4 333 138 240

Diastvlis sp juvenile 712 333 24722 42820

Diastvlopsis spp 686 333 23819 41256

Diastvlopsis dawsoni 1244 1000 43194 13388

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 99 666 3437 3603

Anthuridae 2 666 69 60

Haliophasma aeminata 1 333 34 60

Svnidotea bicuspida 24 1000 833 541

Svnidotea sp 15 666 520 650

Pleuroqonium rubicundum 4 666 138 120

Ampelisca aqassizi 3 666 104 104

Arapelisca macrocephala 4 666 138 159

Wecomedon spp 2 333 69 120

Photis parvidens 16 666 555 636

Photis sp juvenile 45 666 1562 1617

Photis macinerneyi 16 333 555 962

Protomedeia prudens 10 666 347 300

Protoinedeia spp juvenile 31 666 1076 933

Ischyroceridae 3 333 104 130

Ischvrocerus spp juvenile 4 333 138 240

Ischyrocerus pegalops 13 333 451 731

Rhepoxynius spp 16 666 555 636

E-4

3Station no W-1-2 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m2

Rhepoxvnius dabouis 7 666 243 262

Rhepoxvnius abronius 22 1000 763 1053

Foxiphalus spp 1 333 34 60

Dulichia monacantha 10 666 347 365

Caprellidae 6 1000 208 104

Nebalia puaettensis 1 333 34 60

Ophiuroidea 13 666 451 394

Amphiodia spp 3 333 104 180

Number of taxa= 98

Mean number per sample 336433 Standard deviation (SD) 108152

Mean numberm 2 3504514 SDm21126588

H= 241 SDV= 061 SR=1052 J= 036

E-5

Station no W-1-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Anthozoa 1

Nemertinea 13

Leitoscoloplos ouaettensis 62

Orbinia (Phvlo) felix 1

Scoloplos acmeceps 31

Aricidea nr A suecica 6

Spiophanes berkelevorum 252

Spiophanes bombvx 32

Maaelona lonaicornisXhartmanae 1

Frequency of

occurrence

()

333

1000

1000

333

1000

666

1000

1000

333

1000

1000

333

666

666

333

333

333

333

666

333

1000

333

1000

1000

666

333

666

333

666

1000

666

1000

666

1000

1000

1000

333

1000

666

1000

1000

1000

666

666

666

Mean Standard

number deviation

itr mr

34 60

451 323

2152 1011

34 60

1076 601

208 180

8750 2436

1111 365

34 60

1493 592

486 216

208 360

104 104

173 216

34 60

34 60

104 180

34 60

69- 60

34 60

763 262

34 60

1180 433

972 573

69 60

173 300

104 104

34 60

69 60

1597 334

729 633

277 159

659 739

1701 767

1180 1601

763 492

69 120

34340 53917

69 60

659 421

243 159

23472 6096

173 159

694 636

69 60

Chaetozone setosa

Heteromastus filobranchus

Hediomastus ambiseta

Notomastus lineatus

Maldanidae sp indet

Euclvmene zonalis

Phvllodoce hartmanae

Phvllodoce multiseriata

Anaitides multipapillata

Eteone fauchaldi

Eteone sp juvenile

Eteone californica

Polynoidae Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Glvcera capitata

Glycera convoluta

Glycinde arraiaera

Glycinde sp juvenile

Goniada maculata

Nephtys caecoides

Nephtys sp juvenile Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Owenia fusiformis

Ampharete acutifrons

Polycirrus sp complex

Gastropoda Bivalvia

Copepoda

Ostracoda sp A

Ostracoda sp 3

43

14

6

3

5

1

1

3

1

2

1

22

1

34

28

2

5

3

1

2

46

21

8

19

49

34

22

2

2429

2

19

7

676

5

20

2

E-6

3Station no W-1-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Diastvlis sp juvenile 957 1000 33229 19551

Diastvlopsis dawsoni 1161 1000 40312 17324

Leucon subnasica 162 1000 5625 3725

Anthuridae 1 333 34 60

Svnidotea bicuspida 12 1000 416 275

Synidotea sp 18 1000 625 360

Pleuroaonium rubicundum 23 1000 798 394

Ampelisca macrocephala 4 666 138 120

Anonvs adoxusXcerinatus 18 1000 625 360

Lysianassidae juvenile 2 333 69 120

Photis parvidens 87 1000 3020 1502

Photis sp juvenile 103 1000 3576 2376

Protomedeia prudens 93 1000 3229 1637

Protomedeia spp juvenile 33 333 1145 1984

ProtomedeiaXCheirimedeia sp 24 333 833 1443

Cheirimedeia sp 5 333 173 300

Ischvrocerus sp 3 666 104 104

Ischvrocerus peaalops 9 333 312 541

Rhepoxvnius spp 6 333 208 360

Rhepoxynius dabouis 12 1000 416 00

Rhepoxvnius abronius 22 1000 763 365

Svmpleustes subalaber 1 333 34 60

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 2 666 69 60

Caprellidae 1 333 34 60

Nebalia pugettensis 2 333 69 120

Pinnixa sp megalopa 1 333 34 60

Ophiuroidea 31 1000 1076 534

Holothuroidea 11 1000 381 60

Pycnogonida 1 333 34 60

Number of taxa= 75

bullMean number per sample 224900 Standard deviation (SD) 66079

Mean numberm^ 2342708 SDm 688326

H= 328 SDV= 081 SR= 839 J= 053

E-7

Station no W-1-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Stande

number occurrence number deviat]

) m^ m^

Nemertinea 6 1000 208 104

Leitoscoloolos puaettensis 38 1000 1319 318

Orbinia (Phylo) felix 2 333 69 120

Scoloplos acmeceps 21 1000 729 580

Aricidea nr A suecica 7 1000 243 120

Prionospio cirrifera 7 1000 243 159

Spiophanes berkeleyorum 86 1000 2986 627

Spiophanes bombyx 102 1000 3541 1603

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 4 1000 138 60

Chaetozone setosa 61 1000 2118 433

Heteromastus filobranchus 9 1000 312 104

Mediomastus ambiseta 1 333 34 60

Mediomastus californiensis 2 333 69 120

Notomastus lineatus 15 1000 520 375

Maldanidae 2 333 69 120

Euclymene zonalis 3 666 104 104

Phyllodoce hartmanae 1 333 34 60

Phyllodoce longipes 2 333 69 120

Phyllodoce multiseriata 1 333 34 60

Anaitides multipapillata 2 333 69 120

Eteone fauchaldi 5 666 173 216

Eteone sp juvenile 6 333 208 360

Eteone californica 7 666 243 216

Tenonia kitsapensis 1 333 34 60

Pholoe minuta 11 1000 381 60

Sthenalais tertiaglabra 14 1000 486 300

Thalenessa spinosa 2 333 69 120

Hesionidae 2 333 69 120

Heteropodarke heteromorpha 1 333 34 60

Autolytus sp 3 333 104 180

Nereis zonata 1 333 34 60

Glycinde armiaera 21 1000 729 203

Glycinde sp juvenile 4 333 138 240

Goniada maculata 12 1000 416 375

Goniada sp juvenile 2 666 69 60

Nephtys caecoides 22 666 763 781

Nephtys sp juvenile 47 1000 1631 573

Onuphis iridescens 59 1000 2043 1734

Onuphis sp indet 71 1000 2465 2294

Lumbrineris sp indet 3 666 104 104

Owenia fusiformis 3815 1000 132465 101553

Ampharete acutifrons 15 1000 520 104

Polvcirrus sp complex 13 1000 451 216

Gastropoda 2 333 69 120

E-8

3Station no W-1-4 Date 30 Jul 85 Sample size

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrencegt number deviation

() VA nr

Bivalvia 704 1000 24444 5001

Copepoda 111 1000 3854 751

Ostracoda sp A 18 1000 625 275

Ostracoda sp B 12 1000 416 180

Diastvlis sp juvenile 901 1000 31284 16570

Diastvlopsis dawsoni 794 1000 27569 24369

Oxvurostvlis pacifica 3 666 104 104

Leucon subnasica 73 1000 2534 492

Edotea sublittoralis 4 333 138 240

Svnidotea bicuspida 7 333 243 421

Svnidotea sp 19 1000 659 524

Pleuroaonium rubicundum 25 666 868 1011

Bathvcopea daltonae 1 333 34 60

Ampelisca macrocephala 8 666 277 262

Ampelisca sp 1 333 34 60

Atvlus tridens 1 333 34 60

Eohaustorius spp 1 333 34 60

Eohaustorius sawveri 1 333 34 60

Anonvx spp () 1 333 34 60

Anonvs adoxusXcerinatus 4 666 138 159

Svnchelidium shoemakeri 1 333 34 60

Photis brevipes 29 1000 1006 318

Photis SP juvenile 62 666 2152 2135

Protomedeia prudens 17 666 590 513

Protomedeia spp juvenile 15 666 520 477

Ischvrocerus spp juvenile 26 666 902 1387

Ischvrocerus pegalops 14 333 486 842

Rhepoxvnius spp 62 1000 2152 510

Rhepoxynius dabouis 17 1000 590 313

Rhepoxvnius abronius 18 1000 625 360

Sympleustes subglaber 4 333 138 240

Dulichia monacantha 4 333 138 240

Dulichia sp juvenile 1 333 34 60

Caprellidae 7 666 243 334

Nebalia pugettensis 5 666 173 216

Decapoda larvae 21 1000 729 180

Callianassa californiensis 1 333 34 60

Ophiuroidea 29 1000 1006 492

Holothuroidea 2 666 69 60

Pycnogonida 1 333 34 60

E-9

station no W-1-4 Date 30 Jul 85 Sample size (CONTINUED)

Number of taxa= 85

Mean number per sample 251267 Standard deviation (SD) 148529

Mean numberm^ 2617361 SDm^1547174

H= 289 SDV= 071 SR= 941 J= 045

bullV

E-10

3Station no W-1-5 Date 30 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrencej number deviation

() rtr m^

Nemertinea 5 1000 173 85

Leitoscoloplos puaettensis 62 1000 2152 1069

Phylo (Orbinia) felix 1 333 34 60

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 2 666 69 60

Prionospio cirrifera 1 333 34 60

Spiophanes berkelevorum 57 1000 1979 993

Spiophanes bombvx 131 1000 4548 1935

Maaelona sacculata 5 1000 173 60

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 72 1000 2500 477

Heteromastus filobranchus 1 333 34 60

Mediomastus sp indet 1 333 34 60

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 4 666 138 120

Phyllodoce hartmanae 3 666 104 104

Phvllodoce lonaipes 1 333 34 60

Anaitides multipapillata 2 666 69 60

Eteone fauchaldi 3 666 104 104

Eteone californica 7 666 243 262

Pholoe minuta 5 1000 173 60

Sthenalais tertiaglabra 11 1000 381 481

Thalenessa spinosa 5 666 173 159

Nereis zonata 1 333 34 60

Nereis spp 1 333 34 60

Glvcera convoluta 1 333 34 60

Glycinde armigera 26 1000 902 513

Glycinde sp juvenile 1 333 34 60

Goniada maculata 9 1000 312 203

Nephtys caecoides 21 1000 729 275

Nephtys sp juvenile 37 1000 1284 962

Onuphis iridescens 8 1000 277 300

Onuphis sp indet 149 1000 5173 1793

Lumbrineris bicirrata 5 666 173 159

Owenia fusiformis 3007 1000 104409 7337

Ampharete acutifrons 10 1000 347 60

Pista brevibranchiata 1 333 34 60

Polycirrus sp complex 14 1000 436 513

Gastropoda 4 333 133 240

Cylichna attonsa 7 333 243 421

Bivalvia 537 1000 18645 4453

Copepoda 22 333 763 1323

Ostracoda sp A 12 1000 416 360

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 499 1000 17326 25978

E-11

Station no W-1-5 Date 30 Jul 85 Sample size 3

(CONTINUED)

Taxa

Diastvlopsis dawsoni

Leucon subnasica

Edotea sublittoralis

Idotea sp

Svnidotea bicuspida

Pleuroaonium rubicundum

Gammaridea

Arapelisca macrocephala

Ampelisca spp juvenile

Anonvx spp ()

Isaeidae

Photis brevipes

Photis sp juvenile

Protomedeia prudens

Protomedeia spp juvenile

Rhepoxvnius spp

Rhepoxvnius dabouis

Rhepoxvnius abronius

Svmpleustes subalaber

Dulichia monacantha

Caprellidae Nebalia puaettensis

Brachyura Ophiuroidea Holothuroidea

Pycnogonida

Number of taxa= 71

Mean number per sample 181333

Mean numberm^ 1888889 SDm

H= 281 SDV= 067 SR= 814

Standard deviation (SD) 46942

488976

J= 046

Total

number

240

43

5

1

30

18

5

15

3

5

2

51

79

1

56

16

9

49

1

9

1

3

1

18

1

1

Frequency of

occurrence

()

1000

1000

666

333

666

666

666

1000

333

333

333

666

666

333

1000

333

666

1000

333

1000

333

666

333

1000

333

333

Mean Standard

number deviation m^ m^

8333 6969

1493 2047

173 159

34 60

1041 1458

625 683

173 159

520 312

104 180

173 300

69 120

1770 1825

2743 3641

34 60

1944 1421

555 962

312 375

1701 1147

34 60

312 104

34 60

104 104

34 60

625 375

34 60

34 60

E-12

station no W-2-1

Taxa

Nemertinea

Leitoscoloplos puaettensis

Phylo (Orbinia) felix

Scoloplos acmeceps

Aricidea nr A suecica

Prionospio cirrifera

Spiophanes berkeleyorum

Spiophanes bombyx

Hagelona hartmanae

Chaetozone setosa

Tharyx secundus

Tharyx sp indet Heteromastus filobranchus

Mediomastus ambiseta

Mediomastus sp indet

Notomastus lineatus

Unid Naldanidae

Euclymene zonalis

Phyllodoce hartmanae

Phyllodoce multiseriata

Eteone californica

Aphrodite nealiaens

Tenonia kitsapensis

Pholoe minuta

Sthenalais tertiaalabra

Thalenessa spinosa

Hesionidae

Gyptis brevipalpa

Autolytus so

Glycera spp iuvenile tlaquos Goniadidae

Glycinde armiaera

Goniada maculata

Nephtys caecoides

Nephtys sp iuvenile

Onuphis iridescens

Onuphis sp indet

Lumbrineris bicirrata

Notocirrus californiensis

Ovfenia fusiformis

Ampharete acutifrons

Melinna elisabethae

Polycirrus sp complex

Gastropoda Bivalvia

3Date 31 Jul 85 Sample size

Total

number

16

90

9

59

11

14

35

53

12

29

5

2

5

15

5

3

6

1

5

7

6

1

1

41

4

6

1

1

1

1

1

25

5

17

24

4

42

5

1

4471

4

1

15

6

293

Frequency of Mean Standard

occurrence

)

1000

1000

666

1000

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

666

666

333

333

666

333

666

333

333

1000

666

1000

333

333

333

333

333

1000

1000

1000

1000

1000

1000

1000

333

1000

1000

333

1000

1000

1000

number deviation

m^ m^

555 370

3125 1816

312 275

2048 753

381 318

486 394

1215 365

1840 1310

416 208

1006 159

173 120

69 120

173 120

520 180

173 216

104 104

208 360

34 60

173 216

243 421

208 275

34 60

34 60

1423 159

138 159

203 180

34 60

34 60

34 60

34 60

34 60

863 300

173 60

590 334

833 275

138 60

1458 729

173 60

34 60

155243 50907

138 60

34 60

520 312

203 104

10173 1355

E-13

Station no W-2-1 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m2 m^

Copepoda 85 1000 2951 2104

Ostracoda sp A 71 1000 2465 1896

Ostracoda sp B 8 1000 277 159

Diastylis sp juvenile 244 1000 8472 12063

Diastvlopsis dawsoni 217 1000 7534 3799

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 26 1000 902 481

Camplvapsis sp 1 333 34 60

Edotea sublittoralis 2 333 69 120

Svnidotea sp 7 1000 243 60

Pleuroaonium rubicundum 13 1000 451 365

Gammaridea 2 333 69 120

Ampelisca macrocephala 13 1000 451 513

Ampelisca spp juvenile 2 333 69 120

Eohaustorius sawyeri 1 333 34 60

Lysianassidae juvenile 4 333 138 240

Photis parvidens 18 666 625 683

Photis sp juvenile 39 1000 1354 1366

Protomedeia prudens 9 666 312 275

Protomedeia spp juvenile 20 1000 694 394

Rhepoxynius spp 78 1000 2708 104

Rhepoxynius dabouis 53 1000 1840 365

Rhepoxynius abronius 2 333 69 120

Sympleustes subalaber 1 333 34 60

Dulichia monacantha 8 666 277 394

Dulichia sp juvenile 12 666 416 633

Caprellidae 6 1000 208 104

Nebalia puqettensis 10 1000 347 159

Decapoda larvae 4 333 138 240

Pinnixa sp megalopa 2 333 69 120

Ophiuroidea 15 666 520 520

Holothuroidea 1 333 34 60

Number of taxa= 77

Mean number per sample 211133 Standard deviation (SD 59744

Mean numberm^ 2199306 SDm^ 622333

H= 226 SDV= 050 SR= 868 J= 036

E-14

3station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr xs

Anthozoa 2 333 69 120

Nemertinea 10 1000 347 120

Orbiniidae 1 333 34 60

Leitoscoloplos puaettensis 96 1000 3333 1469

Orbinia (Phvlo) felix 3 666 104 104

Scoloplos acmeceps 38 666 1319 1302

Aricidea nr A suecica 4 666 138 159

Minuspio cirrifera 5 333 173 300

Prionospio cirrifera 16 666 555 524

Spiophanes berkelevorum 238 1000 8263 7010

Spiophanes bombyx 36 1000 1250 104

Maaelona sacculata 2 333 69 120

Maaelona hartmanae 5 666 173 159

Chaetozone setosa 30 1000 1041 360

Heteromastus filobranchus 83 1000 2881 3668

Hediomastus ambiseta 34 666 1180 1069

Mediomastus sp indet 25 666 868 945

Notomastus lineatus 1 333 34 60

Euclvmene zonalis 5 666 173 159

Axiothella rubrocincta 2 333 69 120

Phyllodocidae 5 333 173 300

Phvllodoce hartmanae 7 1000 242 340

Phvllodoce sp iuveniles 1 333 34 60

Eteone fauchaldi 1 333 34 60

Eteone spp 2 333 69 120

Eteone sp juvenile 2 333 69 120

Eteone californica 1 333 34 60

Polynoidae 2 333 69 120

Polynoidae sp indet 1 333 34 60

Halosydna brevisetosa 2 333 69 120

Pholoe minuta 28 666 972 939

Sthenalais tertiaglabra 3 666 104 104

Thalenessa spinosa 14 666 486 753

Hesionidae 1 333 34 60

Gvptis brevipalpa 1 333 34 60

Glycera capitata 5 333 173 300

Glycera spp juvenile 1 333 34 60

Glycera convoluta 1 333 34 60

Glycinde armigera 20 1000 694 753

51ycinde sp juvenile 7 666 243 262

Glycinde picta 12 333 416 721

Goniada maculata 2 333 69 120

Mephtys caecoides 5 666 173 159

Mephtys longosetosa 3 333 104 130

E--15

Station no W-2-2 Date 31 Jul 85 Sample size 3

(CONTINUED)

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() vr m^

Nephtys spp 33 333 1145 1984

Nephtys sp juvenile 40 666 1388 1202

Onuphis iridescens 5 666 173 216

Onuphis eleaans 19 333 659 1142

Onuphis sp indet 19 666 659 627

Lumbrineris bicirrata 2 333 69 120

Lumbrineris cruzensis 1 333 34 60

Lumbrineris luti 2 666 69 60

Lumbrineris sp indet 2 333 69 120

Mvriochele heeri 83 333 2881 4991

Owenia collaris 38 333 1319 2285

Owenia fusiformis 2635 1000 91493 31624

Pectinaria spp 2 333 69 120

Pectinaria californiensis 2 333 69 120

Ampharete acutifrons 7 666 243 334

Polvcirrus sp complex 12 666 416 375

Amaeana occidentalis 2 333 69 120

Gastropoda 1 333 34 60

Bivalvia 116 666 4027 3489

Modiolus spp 22 333 763 1323

Lucinoma annulata 17 333 590 1022

Nacoma elimata 2 333 69 120

Macoma expanse 27 333 937 1623

Tellina modesta 10 333 347 601

Siliqua sloati 33 333 1145 1984

Copepoda 12 1000 416 275

Ostracoda 7 333 243 421

Ostracoda sp A 13 666 451 693

Ostracoda sp B 10 333 347 601

Diastylis sp juvenile 319 666 11076 16808

Diastvlopsis dawsoni 2586 1000 89791 121282

Oxvurostvlis pacifica 1 333 34 60

Leucon subnasica 71 1000 2465 1379

Edotea sublittoralis 1 333 34 60

Synidotea bicuspida 4 666 138 159

Synidotea sp 5 666 173 159

Munnoqonium waldronense 12 333 416 721

Pleurogonium rubicundum 23 666 798 1207

Ampelisca aqassizi 1 333 34 60

Ampelisca macrocephala 6 333 203 360

Ampelisca spp juvenile 1 333 34 60

Lysianassidae 11 666 381 334

Lysianassidae juvenile 4 333 138 240

Photis parvidens 9 666 312 312

Photis sp juvenile 12 666 416 375

Photis spp 22 333 763 1323

E-16

3

(CONTINUED)

Station no W-2-2 Date 31 Jul 85 Sample size

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Protomedeia orudens 14 666 486 753

Protomedeia spp iuvenile 16 666 555 709

Ischvrocerus spp 1 333 34 60

Cheriphotis sp 19 333 659 1142

Rhepoxvnius spp 35 666 1215 1198

Rhepoxvnius dabouis 12 666 416 375

Rhepoxvnius abronius 6 333 208 360

Parapleustes den 1 333 34 60

Dulichia monacantha 10 333 347 601

Dulichia sp juvenile 2 333 69 120

Caprellidae 11 666 381 421

Nebalia pugettensis 2 333 69 120

Ophiuroidea 13 666 451 421

Amphiodia spp 5 333 173 300

Holothuroidea 4 666 138 120

Number of taxa= 106

Mean number per sample 239200 Standard deviation (SD) 154661

Mean numberm^ 2491667 SDra 1611054

H= 298 SDV= 073 SR=1183 J= 044

E-17

Station no W-2-3 Date 31 Jul 85 Sample size 3

Taxa Total

number

Nemertinea 10

Leitoscoloplos nuaettensis 11

Orbinia (Phylo) felix 6

Scoloplos acmeceps 1

Aricidea nr A suecica 78

Laonice cirrata 1

Polvdora socialis 1

Spiophanes berkelevorum 23

Spiophanes bombyx 429

Maaelona hartmanae 9

Maaelona lonciicornishartmanae 1 Chaetozone setosa 33

Tharvx multifilis 1

Tharyx secundus 2

Decamastus aracilis 4

Nediomastus ambiseta 2

Mediomastus sp indet 5

Notomastus lineatus 1

Maldanidae sp indet 1

Maldanidae 1

Euclymene zonalis 14

Phyllodoce hartmanae 7

Phyllodoce multiseriata 13

Anaitides multipapillata

Eteone sp indet 1

Eteone californica

Paranaitides polvnoides 1

Pholoe minuta 3

Sthenalais tertiaalabra 3

Gyptis brevipalpa 3

Autolytus sp 1

Glycera convoluta 1

Glycinde armiaera 11

Glycinde sp juvenile 3

Goniada maculata

Nephtys caecoides 17

Nephtys sp juvenile 23

Onuphis iridescens 45

Onuphis sp indet 90

Lumbrineris bicirrata 1

Lumbrineris luti

Lumbrineris sp indet 1

Galathowenia nr G oculata 7

Owenia fusiformis 16691

Melinna sp juvenile 3

Frequency of

occurrence

()

1000

1000

1000

333

1000

333

333

1000

1000

666

333

1000

333

666

666

333

666

333

333

333

1000

666

1000

333

333

1000

333

666

666

666

333

333

1000

333

1000

1000

1000

666

1000

333

333

333

1000

1000

1000

Mean Standard

number deviation

vr m^

347 199

381 120

208 180

34 60

2708 1201

34 60

34 60

798 421

14895 3428

312 312

34 60

1145 416

34 60

69 60

138 159

69 120

173 216

34 60

34 60

34 60

486 120

243 216

451 365

69 120

34 60

208 104

34 60

104 104

104 104

104 104

34 60

34 60

381 159

104 180

138 60

590 334

798 262

1562 2270

3125 1825

34 60

69 120

34 60

243 240

58715 22314 277 60

E-18

3Station no W-2-3 Date 31 Jul 85 Sample size (CONTINUED)

Taxa Total

number

Polycirrus sp complex 10

Euchone nr E hancocki 3

Gastropoda 8

Bivalvia 110

Copepoda 10

Ostracoda sp A 51

Ostracoda sp B 3

Diastylis sp juvenile 21

Diastvlopsis dawsoni 79

Oxvurostvlis pacifica 1

Leucon subnasica 6

Isopoda 1

Pleuroaonium rubicundum 1

Ampelisca macrocephala 21

Ampelisca spp juvenile 6

Eohaustorius spp 1

Lysianassidae juvenile 1

Photis brevipes 4

Photis parvidens 10

Photis sp juvenile 16

Protomedeia prudens 6

Protomedeia spp juvenile 17

Ischyrocerus spp juvenile 1

Rhepoxvnius spp 34

Rhepoxvnius dabouis 20

Rhepoxvnius abronius 15

Sympleustes subglaber 5

Dulichia monacantha 3

Dulichia sp juvenile 4

Caprellidae 8

Pinnixa sp megalopa 1

Ophiuroidea 17

Holothuroidea 1

Number of taxa= 78

Mean number per sample 102433

Mean numberm^ 1067014 SDra

H= 296 SDV= 067 SR= 959

Frequency of Mean Standard

occurrence number deviation

() m^ m^

1000

1000

1000

1000

333

1000

666

666

666

333

666

333

333

1000

1000

333

333

666

333

1000

333

1000

333

1000

1000

1000

666

333

666

1000

333

1000

333

347 60

104 00

277 159

3819 781

347 601

1770 729

104 104

729 650

2743 3641

34 60

208 275

34 60

34 60

729 275

208 180

34 60

34 60

138 159

347 601

555 60

208 360

590 216

34 60

1180 835

694 394

520 375

173 216

104 180

138 159

277 159

34 60

590 216

34 60

Standard deviation (SD) 13963

197536

J= 047

E-19

Station no W-2-4 Date 30 Jul 85 Sample size 3

Taxa Total Frequency of Mean Standard

number occurrence number deviation

() m^ m^

Nemertinea 5 1000 173 85

Echiura 1 333 34 60

Leitoscoloolos nuaettensis 34 1000 1180 809

Phvlo (Orbinia) felix 6 1000 208 208

Scoloplos acmeceps 12 1000 416 208

Aricidea nr A suecica 91 1000 3159 2304

Spionidae 2 333 69 120

Prionospio cirrifera 9 333 312 541

Spio filicornis 1 333 34 60

Spiophanes berkelevorum 40 1000 1388 573

Spiophanes bombvx 381 1000 13229 4899

Maaelona sacculata 1 333 34 60

Haaelona hartmanae 7 666 243 216

Chaetozone setosa 56 1000 1944 1043

Heteromastus filobranchus 3 666 104 104

Mediomastus ambiseta 11 1000 381 318

Mediomastus sp indet 9 1000 312 104

Notomastus lineatus 2 666 69 60

Maldanidae 3 666 104 104

Euclvmene zonalis 15 1000 520 104

Phvllodoce har