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Eutrophication Assessment of Killary, Dungarvan and Wexford Bays. S.B. Bricker, J.G. Ferreira, Y. Xiao National Oceanic and Atmospheric Administration Longline Environment Institute of Marine Research. Project team meeting for Irish Carrying Capacity Assessment June 11-12, 2007 - PowerPoint PPT Presentation
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Eutrophication Assessment of Eutrophication Assessment of Killary, Dungarvan and Wexford Bays Killary, Dungarvan and Wexford Bays
http://www.eutro.org
S.B. Bricker, J.G. Ferreira, Y. XiaoNational Oceanic and Atmospheric Administration
Longline EnvironmentInstitute of Marine Research
Project team meeting for Irish Carrying Capacity AssessmentJune 11-12, 2007
Dublin, Ireland
http://www.eutro.us
The Problem – The Assessment ApproachThe Problem – The Assessment Approach
High algal production (Chl)High algal production (Chl)Loss of water clarity Epiphyte problems
Macroalgal problemsMacroalgal problems
Fish kills Loss of habitat
Human health risksLoss of tourism
Closed fishing grounds
Loss of SAVLoss of SAVLow D.OLow D.O
Nuisance/Toxic blooms (HABs)Nuisance/Toxic blooms (HABs)
IncreasedN and P concentration
Symptoms and Consequences of Nutrient EnrichmentNutrient Inputs Primary Secondary Consequences and Processing Impacts Impacts of Symptoms
P: Influencing Factors – Natural processing + Human Nutrient LoadS: Overall Eutrophic Condition – Condition of waterbodyR: Future Outlook – What will happen in the future?
ASSETS: Pressure - State - ResponseASSETS: Pressure - State - Response
http://www.eutro.org http://ian.umces.edu/neea
Key Aspects of the NEEA approachKey Aspects of the NEEA approach
The NEEA approach may be divided
into three parts:
Division of estuaries into
homogeneous areas
Evaluation of data completeness
and reliability
Application of indices
Tidal freshwater (<0.5 psu) Tidal freshwater (<0.5 psu) Mixing zone (0.5-25 psu)Mixing zone (0.5-25 psu) Seawater zone (>25 psu)Seawater zone (>25 psu)
Spatial and temporal Spatial and temporal
quality of datasets quality of datasets
(completeness) (completeness)
Confidence in results Confidence in results
(sampling and analytical (sampling and analytical
reliability)reliability)
Overall Eutrophic Condition (OEC) indexOverall Eutrophic Condition (OEC) index
Overall Human Influence (OHI) indexOverall Human Influence (OHI) index
Determination of Future Outlook (DFO) indexDetermination of Future Outlook (DFO) index
PressurePressure
StateState
(Response)(Response)
Matrix for Determining Overall Eutrophic Matrix for Determining Overall Eutrophic ConditionCondition
Overall level of expression of eutrophic conditions
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
MODERATELevel of expression of eutrophic conditions is
substantial
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
HIGHHigh primary and
secondary symptom
eutrophication problems
HIGHHigh primary and
secondary symptom
eutrophication problems
MODERATELevel of expression of eutrophic conditions is
substantial
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
factors may be involved factors may be involved
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
Overall level of expression of eeutrophic conditions
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
MODERATELevel of expression of eutrophic conditions is
substantial
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
HIGHHigh primary and
secondary symptom
eutrophication problems
HIGHHigh primary and
secondary symptom
eutrophication problems
MODERATELevel of expression of eutrophic conditions is
substantial
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
factors may be involved factors may be involved
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
MODERATELevel of expression of eutrophic conditions is
substantial
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
MODERATEPrimary symptoms high but problems with more
serious secondarysymptoms still not being
expressed
MODERATE HIGHPrimary symptoms high
and substantial secondary symptoms
becoming more expressed, indicating
potentially serious problems
levels indicate serious
HIGHHigh primary and
secondary symptom
eutrophication problems
HIGHHigh primary and
secondary symptom
eutrophication problems
HIGHHigh primary and
secondary symptom
eutrophication problems
HIGHHigh primary and
secondary symptom
eutrophication problems
MODERATELevel of expression of eutrophic conditions is
substantial
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
HIGHSubstantial levels of eutrophic conditions
occuring with secondary symptoms indicating
serious problems
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
conditions
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
MODERATE HIGHHigh secondary
symptoms indicate serious problems, but low primary indicates other factors may also be involved in causing
conditionsin causing the conditions
LOWLevel of expression of eutrophic conditions is
minimal
Low secondary symptoms
Moderate secondary symptoms
High secondary symptoms
0 0.3 0.6 1
Low
prim
ary
sym
ptom
sM
oder
ate
prim
ary
sym
ptom
sH
igh
prim
ary
sym
ptom
s
0.3
0.6
1
factors may be involved factors may be involved
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other factors may be involved factors may be involved
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWModerate secondary symptoms indicate
substantial eutrophic conditions, but low
primary indicates other
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
MODERATE LOWPrimary symptoms
beginning to indicate possible problems but still very few
secondary symptoms expressed
Summary Characteristics – Data SourcesSummary Characteristics – Data Sources
SystemTotal
Area (km2)
Salinity Zones
(km2)
Mean depth
(m)
Tide
Range
(m)
Data sources
Killary 9.5Mixing (3)
Seawater (6.5)12.8 4
Rodhouse Roden 1980-81
CLAMS 2002
Dungarvan 20 Seawater 3.3 3EPA 1992 – 2006
CLAMS 2002
Wexford 48Mixing (5)
Seawater (3)4.6 4 EPA 1992 - 2006
Killary Harbour 1981Killary Harbour 1981
Index Method Parameter Level of expression
Index result
IFSusceptibility
Dilution potential Low
ModerateFlushing Potential Moderate
Nutrient inputs Low
OEC
PrimarySymptoms
Chlorophyll a Low
Moderate High
Macroalgae Low
SecondarySymptoms
Dissolved Oxygen Unknown
SAV loss Unknown
Nuisance and toxic blooms
Low*
ASSETS application to Killary HarbourASSETS application to Killary Harbour
0
2
4
6
8
10
12
14
16
1 2 3 4 5 6 7 8 9 10 11 12
Chlorophyll a (mg m-3
)
Fre
quen
cy
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Cum
ulat
ive
%
Frequency
Cumulative %
Mixing zoneMixing zone
SeawaterSeawater
*HABs from offshore, advect into system
Dungarvan 1992-2006
ASSETS application to DungarvanASSETS application to Dungarvan
Index Method Parameter Level of expression
Index result
OEC
Primary Symptoms
Chlorophyll a High
Moderate
Macroalgae Unknown
SecondarySymptoms
Dissolved Oxygen No problem
SAV loss Unknown
Nuisance and toxic blooms No problem
Seawater zoneSeawater zone
Wexford 1992-2006
Mixing zoneMixing zone SeawaterSeawater
Wexford 1992-2006ASSETS application to WexfordASSETS application to Wexford
Index Method Parameter Level of expression
Index result
OEC
Primary Symptoms
Chlorophyll a High
Moderate
Macroalgae Unknown
SecondarySymptoms
Dissolved Oxygen No problem
SAV loss Unknown
Nuisance and toxic blooms No problem
Preliminary Results for Three Bays
Bay Chl Macro DO SAV HAB OEC
Killary L L U U L* L
Dungarvan H U NP U NP M
Wexford H U NP U NP M
Limited by missing data, for Killary by old data
*from offshore, advect into system
