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MARINE ECOSYSTEMSANDBIODIVERSITY
Howdoesthediversityoflifecontributetomarineecosystems'resilience?
ACTIVITY1:OCEANABIOTICFACTORS |45MINS
DIRECTIONS1.Buildbackgroundontheabioticandbioticcomponentsofecosystems.
StatethattherootofthewordecologyistheGreekwordoikos,meaning“house.”Ecosystemliterallymeansa“systemofhouses.”Ecologyisthestudyofnature’shousesandtheorganismslivinginthem.Ask:Doesanyoneknowthescientifictermforthe“living”componentsofanecosystem?Elicitfromstudentsthatabioticfactorisanylivingcomponentoftheenvironmentandaskforexamples,suchasplants,animals,fungi,algae,andbacteria.Ask:Doesanyoneknowthescientifictermforthe“non-living”componentsofanecosystem?Elicitfromstudentsthatanabioticfactorisanynon-livingcomponentoftheenvironmentandaskforexamples,suchassunlight,temperature,moisture,windorwatercurrents,soiltype,andnutrientavailability.Displaytheillustrationofoceanabioticfactors.Tellstudentsthattheinteractionofmultiplebioticandabiotic,orphysical,factorsdetermineswhichspeciescansurviveinaparticularecosystem.
2.Havestudentsdefineabioticfactorsandphysicalprocessesthatimpact
Yourwebbrowser(Safari7)isoutofdate.Formoresecurity,comfortandthebestexperienceonthissite: Updateyourbrowser Ignore
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oceanecosystems.
Explaintostudentsthat,inthisactivity,theywilllearnmoreaboutabioticfactorsandphysicalprocessesthatimpactoceanecosystems.ArrangestudentsinsmallgroupsandgiveeachgrouptwoorthreeindexcardsandacopyoftheOceanAbioticFactorshandout.Readaloudthedirections.Explainthatstudentswillusethehandouttocreateconceptmapvocabularycardsandlearntheterms.Assigntwoorthreetermstoeachgroup.Ononesideofeachcard,havestudentsuseapenciltodividethecardintothreesections.Foreachsection,havethemrecordthefollowinginformation:
adefinitionofthetermintheirownwordsasymbolordrawingtorepresentthetermoneexampleofhowthetermaffectsorganismslivingintheocean
Aftertheyfinish,collectthecardsandpostthemontheboard.Asaclass,goovereachcardandmatchittoitscorrespondingterm/definition.Addressstudents'questions.
3.Havestudentsinvestigatetheabioticfactorsandphysicalprocessesofdifferentoceanecosystems.
Tellstudentsthattheywillnextlearnaboutthreedifferentoceanecosystems(rockyshore,coralreef,andopenocean)andidentifyabioticfactorsthataffecttheorganismslivinginthem.DistributeacopyofOceanEcosystemDescriptionstoeachsmallgroup.YoucanalsodistributecopiesofOceanEcosystemIllustrations,oryoucanprojecttheEcosystemIllustrationgalleryinstead.Assigneachgrouponeofthethreeecosystems.Havegroupsreadtheirassignedecosystem'sbriefdescriptionandlookatitsmatchingillustrationtolearnwhatabioticfactorsorphysicalprocessesimpactorganismsintheecosystem.Askgroupstolabelalloftheabioticfactorstheyseeintheillustration.Next,askgroupstolistotherabioticfactorsthatarenotseenintheillustration.Then
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provideeachgroupwithacopyoftheOceanAbioticFactorsChart.Havestudentsdecidewhichabioticfactorsareimpactingtheorganismsineachoftheecosystemsandplacecheckmarksnexttothosefactors.Thenhavestudentswriteoneormoreexamplesofhowthatfactorisimpactingorganismsintheecosystem.Facilitateasneeded,givingstudentsabout15minutesfortheirsmall-groupwork.Finally,asaclass,facilitateadiscussioninwhichstudentssharewhattheylearnedabouteachecosystem.Asexamplesofabiotic-bioticinteractionsaregiven,askvolunteerstofillintheOceanAbioticFactorsChartprojectedontheboard.
4.Havestudentsdiscusshowhumanscanimpacttheabioticfactorsandprocessesofoceanecosystems.
Emphasizethathumansshouldbelistedasabioticfactorandthattheycanimpacttheabioticfactorsandprocessesofoceanecosystems.Intheirsmallgroups,havestudentsidentifyanddiscussdifferentwayshumansareimpactingtheabioticfactorsintheirassignedecosystem.Afterafewminutesofsmall-groupdiscussions,bringtheclasstogetherforfurtherdiscussion.Ask:Whatarewaysinwhichhumanscanimpacttheabioticfactorsintheseoceanecosystems?Elicitanddiscussstudentresponses.Forexample,overhalfoftheAmericanpopulationliveswithin50milesofthecoast(NOAA,2008).Ask:Howcouldthisimpactcoastalecosystems?Elicitfromstudentsthatthiscoulddestroycoastalhabitat,increasepollution,strainwaterresources,andincreasenon-nativespecies.EncouragestudentstolistimpactsduetotheGulfoilspill,oceanwarming,andland-basedrunofffromnutrients/fertilizers,soil,andpollution.Explainthatallbioticandabioticfactorsareimportantbecausetheyareallinteractingtomaintainthehealthandbalanceofanecosystem.
InformalAssessment
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Leadadiscussioninwhichstudentscompareandcontrasttheabioticfactorsandphysicalprocessesimpactingthethreedifferentmarineecosystems.Askstudentstoanalyzeanddiscusswhichmarineecosystemisthemostinhospitableintermsofitsabioticcharacteristics.
ExtendingtheLearningUsetheNationalGeographicMapMakerInteractiveandthetemperature,chlorophyll,andsurfacecurrentslayerstodemonstratehowoneoceanbioticfactor,likechlorophyllconcentration,isaffectedbytwoabioticfactors,likeseasurfacetemperatureandcurrents.
OBJECTIVES
Subjects&DisciplinesGeographyPhysicalGeography
ScienceEarthscienceOceanography
LearningObjectivesStudentswill:
listabioticfactorsofoceanecosystemsidentifyanddescribeabioticfactorsandphysicalprocessesthatimpactoceanecosystemslistwayshumansinteractwithandimpactoceanecosystems
TeachingApproach
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Learning-for-use
TeachingMethodsCooperativelearningDiscussionsHands-onlearningInformationorganization
SkillsSummaryThisactivitytargetsthefollowingskills:
21stCenturyThemesGlobalAwareness
CriticalThinkingSkillsAnalyzingUnderstanding
GeographicSkillsAcquiringGeographicInformationAnalyzingGeographicInformation
NationalStandards,Principles,andPracticesNATIONAL GEOGRAPHY STANDARDS
•Standard1:Howtousemapsandothergeographicrepresentations,geospatialtechnologies,andspatialthinkingtounderstandandcommunicateinformation
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NATIONAL SCIENCE EDUCATION STANDARDS
•(9-12)StandardB-4:Motionsandforces•(9-12)StandardC-4:Interdependenceoforganisms•(9-12)StandardC-6:Behavioroforganisms
OCEAN LITERACY ESSENTIAL PRINCIPLES ANDFUNDAMENTAL CONCEPTS
•Principle1c:Throughouttheoceanthereisoneinterconnectedcirculationsystempoweredbywind,tides,theforceoftheEarth’srotation(Corioliseffect),theSun,andwaterdensitydifferences.Theshapeofoceanbasinsandadjacentlandmassesinfluencethepathofcirculation.•Principle5f:Oceanhabitatsaredefinedbyenvironmentalfactors.Duetointeractionsofabioticfactorssuchassalinity,temperature,oxygen,pH,light,nutrients,pressure,substrateandcirculation,oceanlifeisnotevenlydistributedtemporallyorspatially,i.e.,itis“patchy”.SomeregionsoftheoceansupportmorediverseandabundantlifethananywhereonEarth,whilemuchoftheoceanisconsideredadesert.•Principle6f:Coastalregionsaresusceptibletonaturalhazards(suchastsunamis,hurricanes,cyclones,sealevelchange,andstormsurges).
PREPARATION
BACKGROUND&VOCABULARY
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BackgroundInformationMarineecosystemsarecomprisedofthelivingorganismsthathaveadaptedtotheabioticfactorsandphysicalprocessesthatcharacterizeeachecosystem.Bioticfactorsincludeplants,animals,fungi,algae,andbacteria.Abioticfactorsincludesunlight,temperature,moisture,windorwatercurrents,soiltype,andnutrientavailability.Oceanecosystemsareimpactedbyabioticfactorsinwaysthatmaybedifferentfromterrestrialecosystems.Humansarebioticcomponentsofmarineecosystemsandhaveasignificantimpactonthemaintenanceofhealthy,well-balancedoceanecosystems.
PriorKnowledge[]
RecommendedPriorActivitiesNone
Vocabulary
TermPartofSpeech
Definition
abiotic adjective lackingorabsentoflife.bioticfactornoun effectorimpactofanorganismonitsenvironment.
current nounsteady,predictableflowoffluidwithinalargerbodyofthatfluid.
ecosystem nouncommunityandinteractionsoflivingandnonlivingthingsinanarea.
nutrient nounsubstanceanorganismneedsforenergy,growth,andlife.
oxygen nounchemicalelementwiththesymbolO,whosegasformis21%oftheEarth'satmosphere.
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salinity noun saltiness.
substrate nounbaseofhardmaterialonwhichanon-movingorganismgrows.Alsocalledsubstratum.
temperaturenoundegreeofhotnessorcoldnessmeasuredbyathermometerwithanumericalscale.
tide nounriseandfalloftheocean'swaters,causedbythegravitationalpullofthemoonandsun.
wave noun movingswellonthesurfaceofwater.
TermPartofSpeech
Definition
FUNDER
ACTIVITY2:MARINEFOODCHAINSANDBIODIVERSITY |50MINS
DIRECTIONS1.Definetheroleofmarinemicrobes.Explaintostudentsthat,inasingledropofsaltwater,thousandsofmicrobes(tinyorganisms),includingbacteriaandphytoplankton(tinyfloatingplants),areinteractingtoformthebaseofthefoodwebfortheentireocean.Theoxygenandbiomasstheyproducealsosustainsterrestriallife.Tellstudentsthatphytoplankton(algae)takeinsunlight,nutrients,carbondioxide,andwatertoproduceoxygenandfoodforotherorganisms.Ask:Whatisthisprocesscalled?(photosynthesis)Explainthatothermicrobes,likemanybacteria,playaroleattheotherendofthefoodchainbybreakingdowndeadplantandanimalmaterialandchangingitintoaformthatcanbere-usedasnutrientsbyphytoplanktonandotherorganisms.Ask:Whatisthisprocesscalled?
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(decomposition)
2.WatchtheNationalGeographicvideo“TinyNewSeaSpeciesDiscovered.”
ShowstudentstheNationalGeographicvideo(2minutes,30seconds)“TinyNewSeaSpeciesDiscovered.”Ask:
WhatisthegoaloftheCensusofMarineLife?(forscientiststotrytouncoverasmuchaspossibleaboutdiversity,distribution,andabundanceoflifeintheoceanwithintenyears)Whathavescientistslearnedabouttheimportanceofmicrobesintheocean?(Microbesplayakeyroleinthewaynutrientsmovethroughtheocean.)Whatdoallmicrobesintheglobaloceancollectivelyweigh?(theequivalentof240billionAfricanelephants,orabout90percentofalltheocean’sbiomass)
Summarizethatmicrobes,includingphytoplanktonandbacteria,arethebeginningandend,respectively,ofoceanfoodchainsandarethereforeessentialcomponentsofmarineecosystems.
3.Introducetrophiclevelvocabulary.Ask:Whatisafoodchain?Askstudentstolisttheorganismsinaterrestrialoraquaticfoodchainthattheyarefamiliarwith.Explaintostudentsthatthetrophiclevelofanorganismisthepositionitoccupiesonthefoodchain.Anorganism’strophiclevelismeasuredbythenumberofstepsitisawayfromaprimaryproducer/autotroph(photosynthesizer).Writethetrophiclevelsanddefinitionslistedbelowontheboard,leavingofftheexamplesprovided.Havestudentstrytoidentifythetrophiclevelforeachoftheorganismsontheirlist.Invitevolunteerstosharetheiranswerswiththeclass.Discussthecorrectanswers.Nextaskstudentstobrainstormoceanexamplesofeachtrophiclevelandwritetheircorrectresponsesontheboard.Eventually,addalloftheexampleslistedbelow.
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primaryproducer/autotrophs—organisms,likeplants,thatproducefood.Examples:phytoplankton,algaeprimaryconsumer/heterotroph—ananimalthateatsprimaryproducers.Examples:mussels,oysters,krill,copepods,shrimpsecondaryconsumer/heterotroph—ananimalthateatsprimaryconsumers.Examples:blueclawcrab,lobster,seastar,humpbackwhale,silversidetertiaryconsumer/heterotroph—ananimalthateatssecondaryconsumers.Examples:shark,dolphinapexpredator/heterotroph—ananimalatthetopofthefoodchainwithnopredators.Examples:shark,dolphindecomposer/detritivores—organismsthatbreakdowndeadplantandanimalmaterialandwastesandreleaseitagainasenergyandnutrientsintheecosystem.Examples:bacteria,fungi,worms,crabs
4.HavestudentswatchtheNationalGeographicvideo“Krill.”Explaintostudentstheyaregoingtowatchavideothathighlightsamarinefoodchain.Tellstudentsthatwhiletheyarewatchingthefilm,theyaregoingtowriteexamplesoforganismsfromeachtrophiclevel.Whenthefilmisover,theywillidentifyeachorganism’strophiclevelusingtheinformationfromtheboard.ShowstudentstheNationalGeographicvideo(2minutes)“Krill.”Afterthevideoisover,allowstudentsacoupleofminutestoproperlyidentifythetrophiclevelsofeachoftheorganismsshowninthefilm.Ask:
Whatistheultimatesourceofenergyinthisecosystem?(thesun;photosynthesis)Whatistheprimaryproducerinthevideo?(phytoplanktonandotheralgae)Whatistheprimaryconsumerinthevideo?Isitanherbivoreorcarnivore?(krill;herbivore)Whatsecondaryandtertiaryconsumersareshowninthevideo?Aretheyherbivoresorcarnivores?(anchovies,sardines,birds,salmon,tuna,humpbackandbluewhales;carnivores)
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5.Havestudentscreatefoodchains.Remindstudentsthatfoodchainsconnectorganismsthroughenergytransferamongproducers,consumers,anddecomposers.Theseenergylevelsarecalledtrophiclevels.Asignificantamountofenergyislostbetweentrophiclevels.Dividestudentsintofivegroups.Assigneachgrouponeofthefollowingmarineecosystems:
CoralReefKelpForestOpenOceanRockyShoreSandyShore
HavegroupsidentifythegeographiclocationsoftheirmarineecosystemsontheirWorldPhysicalTabletopMaps,includedinthePhysicalWorldMapMakerKit.ThengiveeachgroupitsassignedMarineEcosystemCardsHandout,andeachstudentaFeedingFrenzyworksheet.Havestudentscutouttheecosystemcards,discusstheactivityasagroup,andthenindividuallycompletetheFeedingFrenzyworksheet.
6.Haveawhole-classdiscussionaboutthemarineecosystemsandfoodchains.InvitesmallgroupstosharetheircompletedFeedingFrenzyworksheetswiththewholeclass.Revieweachofthefivefoodchains,aswellastheecosystemsinwhicheachfoodchainislikelytobefound.Ask:
Lookingacrossthedifferentfoodchains,whichoftheorganismscanmaketheirownfoodthroughphotosynthesis?Comparethefoodchainstoterrestrialfoodchainsyoumayknow.Howarethemarinefoodchainsthesame?Howaretheydifferent?Howmighthumansbeapartofthefoodchains?
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ModificationInStep1,usealocalfoodchainexampletocementstudentcomprehension.
ModificationInStep5,insteadofsmallgroupworkanddiscussions,youmaychoosetoturntheFeedingFrenzyactivityintoagameformatwithrulesandpoints.
InformalAssessmentUsetheprovidedFeedingFrenzyAnswerKeytoassessstudents'comprehension.
ExtendingtheLearningHavestudentsusetheirfoodchaincardstocreatefoodwebs.Discusstheroleeachorganismplaysinthefoodweb.
OBJECTIVES
Subjects&DisciplinesGeographyPhysicalGeography
ScienceBiologicalandlifesciencesEcologyOceanography
LearningObjectivesStudentswill:
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summarizetheroleofphotosynthesisanddecompositionwithinfoodchainsdistinguishbetweendifferenttrophiclevelsanddescribeexamplesoffoodchainsinmajormarineecosystemsorderorganismsinafoodchainbytrophiclevels
TeachingApproachLearning-for-use
TeachingMethodsBrainstormingCooperativelearningDiscussionsHands-onlearningMultimediainstruction
SkillsSummaryThisactivitytargetsthefollowingskills:
21stCenturyStudentOutcomesLearningandInnovationSkillsCommunicationandCollaboration
CriticalThinkingSkillsAnalyzingUnderstanding
GeographicSkillsAcquiringGeographicInformationAnsweringGeographicQuestions
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NationalStandards,Principles,andPracticesNATIONAL GEOGRAPHY STANDARDS
•Standard8:ThecharacteristicsandspatialdistributionofecosystemsandbiomesonEarth'ssurface
NATIONAL SCIENCE EDUCATION STANDARDS
•(9-12)StandardC-4:Interdependenceoforganisms•(9-12)StandardD-1:Energyintheearthsystem
OCEAN LITERACY ESSENTIAL PRINCIPLES ANDFUNDAMENTAL CONCEPTS
•Principle5a:OceanliferangesinsizefromthesmallestvirustothelargestanimalthathaslivedonEarth,thebluewhale.•Principle5b:Mostlifeintheoceanexistsasmicrobes.Microbesarethemostimportantprimaryproducersintheocean.Notonlyaretheythemostabundantlifeformintheocean,theyhaveextremelyfastgrowthratesandlifecycles.•Principle5d:Oceanbiologyprovidesmanyuniqueexamplesoflifecycles,adaptationsandimportantrelationshipsamongorganisms(suchassymbiosis,predator-preydynamicsandenergytransfer)thatdonotoccuronland.
PREPARATION
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BACKGROUND&VOCABULARY
BackgroundInformationMarinemicrobesincludetinyphotosyntheticphytoplankton(algae)andbacteriathatformthebaseofmarinefoodchains,becomingfoodforprimaryandsecondaryconsumerslikezooplankton,smallfish,andfilterfeeders.Tertiaryconsumersandapexpredators,includingbigfish,marinemammals,andhumans,formthetoptrophiclevels.Decomposers,includingbacteria,completethefoodchainbybreakingdownorganicmaterialandreleasingitasnutrientsandenergy.Marinebiodiversityandtrophicrelationshipsdefineavarietyofmarinefoodchainsandinterconnectthemincomplexoceanicfoodwebs.
PriorKnowledge[]
RecommendedPriorActivitiesMappingMarineEcosystemsMarineFoodWebs
Vocabulary
TermPartofSpeech
Definition
apexpredator nounspeciesatthetopofthefoodchain,withnopredatorsofitsown.Alsocalledanalphapredatorortoppredator.
autotroph nounorganismthatcanproduceitsownfoodandnutrientsfromchemicalsintheatmosphere,usuallythroughphotosynthesisorchemosynthesis.
coralreef nounrockyoceanfeaturesmadeupofmillionsofcoralskeletons.
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decomposer noun organismthatbreaksdowndeadorganicmaterial.
decomposition nounseparationofachemicalcompoundintoelementsorsimplercompounds.
detritivore noun organismthatconsumesdeadplantmaterial.
ecosystem nouncommunityandinteractionsoflivingandnonlivingthingsinanarea.
foodchain noungroupoforganismslinkedinorderofthefoodtheyeat,fromproducerstoconsumers,andfromprey,predators,scavengers,anddecomposers.
foodweb nounallrelatedfoodchainsinanecosystem.Alsocalledafoodcycle.
heterotroph nounorganismthatcannotmakeitsownnutrientsandmustrelyonotherorganismsforfood.
hydrothermalvent
nounopeningontheseafloorthatemitshot,mineral-richsolutions.
kelpforest noununderwaterhabitatfilledwithtallseaweedsknownaskelp.
marineecosystem
noun communityoflivingandnonlivingthingsintheocean.
microbe noun tinyorganism,usuallyabacterium.openocean noun areaoftheoceanthatdoesnotborderland.
photosynthesisnounprocessbywhichplantsturnwater,sunlight,andcarbondioxideintowater,oxygen,andsimplesugars.
phytoplankton nounmicroscopicorganismthatlivesintheoceanandcanconvertlightenergytochemicalenergythroughphotosynthesis.
trophiclevel nounoneofthreepositionsonthefoodchain:autotrophs(first),herbivores(second),andcarnivoresandomnivores(third).
TermPartofSpeech
Definition
FUNDER
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ACTIVITY3:MARINEFOODWEBS |1HR
DIRECTIONS1.Buildbackgroundaboutmarinetrophicpyramidsandfoodwebs.
Reviewwithstudentsthatfoodchainsshowonlyonepathoffoodandenergythroughanecosystem.Inmostecosystems,organismscangetfoodandenergyfrommorethanonesource,andmayhavemorethanonepredator.Healthy,well-balancedecosystemsaremadeupofmultiple,interactingfoodchains,calledfoodwebs.Askvolunteerstocometothefrontoftheroomanddrawapyramidandaweb.Explainthattheshapesofapyramidandawebaretwodifferentwaysofrepresentingpredator-preyrelationshipsandtheenergyflowinanecosystem.Foodchainsareoftenrepresentedasfoodpyramidssothatthedifferenttrophiclevelsandtheamountofenergyandbiomasstheycontaincanbecompared.IntheMarinePyramidsgallery,displaytheMarineFoodPyramid.Ask:Basedonthisfoodpyramid,doyouthinktherearemoretoppredators(grayreefsharks,bluefintuna)thanproducers(phytoplankton,seagrass,algae)?Whyorwhynot?ThendisplaytheMarineEcologicalPyramidandaskthesamequestion.Leadstudentstoobservethedifferencesbetweenthetwographics.Theecologicalpyramidshouldhelpthemtoseethatwhilethetraditionalfoodpyramiddisplaysthetrophiclevelsandspecificorganisms,itdoesnotaccuratelydisplaytheproportionofenergylossandbiomassrequiredbetweentrophiclevels.Finally,displaytheWhatWeEatMakesADifferencegraphicandexplainthatonaverage,only10percentofenergyandbiomassinonetrophiclevelispassedtothenexthigherlevel.
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2.Havestudentsanalyzeamarinefoodwebexample.
DisplaytheCoralReefFoodWebgallery.Scrollthroughtheillustrationsandhavestudentsreadthecaptions.Ask:Howarefoodwebssimilartoordifferentfromfoodpyramids?Whydofoodwebshavearrowsbetweenorganismsandnotjuststraightlines?(Arrowsrepresenttheflowofenergyandbiomassbetweentrophiclevels.)Besuretopointouttheroleofdecomposersandprovideexamples.Althoughdecomposersareincludedinfoodwebs,theyareabsentinfoodpyramids.
3.Havestudentsresearchmarineorganisms.
Tellstudentsthattheywillbuildtheirownmarinefoodwebfortwointerrelatedecosystems:mangrovesandcoralreefs.Havestudentsworkinpairsorindividually.Assigneachpairanorganism,andhavethemusethemangroveandcoralreefecosystemillustrationsintheMarineEcosystemsgalleryforreference.DistributeacopyoftheMarineOrganismNotetakingworksheet.Havestudentpairsusetheschoolcomputerlaband/orprovidedInternetresourcestoresearchtheirorganismandcompletetheworksheet.Aftercheckingtheworksheetsforcompletionandaccuracy,giveeachstudentpairanindexcardtoillustrateitsorganismandrecordthefollowinginformation:
commonnameoforganismlistofpredators,ifapplicablelistofprey,ifapplicable
Iftimeislimited,letstudentsprintimagesoftheirorganismsratherthandrawingthem.
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4.Havestudentscreateawhole-classfoodwebdisplay.
Afterallstudentshavecompletedtheirworksheetsandmadetheirorganismindexcards,askstudentstopresenttheirorganismsonetrophiclevelatatime,graduallybuildingthewhole-classfoodwebdisplay.Afterallthecardsarecorrectlyplacedonthedisplay,havestudentsconnectinterdependentspecies(predator-preyrelationships)usingstringorthread.Ifpossible,turnthestringorthreadintoarrowsandremindstudentsthattheyrepresenttheflowofenergyandbiomassfromoneorganism(trophiclevel)toanother.Promptstudentstorecognizetrophicrelationshipsbetweenthemangroveandcoralreefecosystems.
5.Haveawhole-classdiscussionaboutthefoodwebdisplay.
Allowplentyoftimefordiscussion.Analyzethefoodwebdisplayasyoudiscusstheinterconnectednessofspecieswithinandbetweenthemangroveandcoralreefecosystems.Ask:
Whattwoecosystemsarerepresentedinthisinterconnectedfoodweb?Whichspeciesareonlypredators?Whichareonlyprey?Whichareboth?Whatwouldhappentothefoodwebifonespeciesweretobecomeendangeredorextinct?Whichspecieswouldbeaffected?Whichecosystemwouldbeaffected?Whyisphytoplanktonsoimportanttomarinefoodwebs?Whathappenstotheamountofenergy/biomassthatistransferredfromonetrophicleveltothenext?Whatrolesdohumansplayinmarinefoodwebs?Howcanhumanactionsupsetthebalanceofanoceanecosystem?
InformalAssessment
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Students'ecosystemscanbeevaluatedontheplacementofeachorganismintothepropertrophiclevelandonthelabelingofhowenergymovesthroughtheecosystem.Duringtheclassdiscussiontheteachershouldpromptstudentstotalkabouttheamountofenergythatislostbetweentrophiclevelsusingtheirorganismsasexamples.Thekeypointofthisactivityishowmuchenergyisretainedandlostbetweeneachlevelofthefoodweb.
ExtendingtheLearningAshomeworkoranindependentproject,havestudentsresearchadifferentmarineecosystemandconstructafoodweborfoodpyramidtorepresentthatecosystem.
OBJECTIVES
Subjects&DisciplinesGeographyPhysicalGeography
ScienceBiologicalandlifesciencesEcologyOceanography
LearningObjectivesStudentswill:
createafoodwebdisplaytoillustratethetrophicrelationshipsbetweenmarineorganismsidentifycommonorganismslivinginamarineecosystemresearchecologicalfactsaboutmarineorganismsprepareillustratedcardsdepictingmarineorganismsandtheirpredator-prey
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relationships
TeachingApproachLearning-for-use
TeachingMethodsBrainstormingCooperativelearningDiscussionsInformationorganizationResearch
SkillsSummaryThisactivitytargetsthefollowingskills:
21stCenturyStudentOutcomesLearningandInnovationSkillsCommunicationandCollaboration
CriticalThinkingSkillsAnalyzingCreatingUnderstanding
GeographicSkillsAcquiringGeographicInformationAnalyzingGeographicInformationOrganizingGeographicInformation
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NationalStandards,Principles,andPracticesNATIONAL GEOGRAPHY STANDARDS
•Standard8:ThecharacteristicsandspatialdistributionofecosystemsandbiomesonEarth'ssurface
NATIONAL SCIENCE EDUCATION STANDARDS
•(9-12)StandardC-4:Interdependenceoforganisms•(9-12)StandardC-5:Matter,energy,andorganizationinlivingsystems•(9-12)StandardC-6:Behavioroforganisms•(9-12)StandardD-1:Energyintheearthsystem
OCEAN LITERACY ESSENTIAL PRINCIPLES ANDFUNDAMENTAL CONCEPTS
•Principle5d:Oceanbiologyprovidesmanyuniqueexamplesoflifecycles,adaptationsandimportantrelationshipsamongorganisms(suchassymbiosis,predator-preydynamicsandenergytransfer)thatdonotoccuronland.•Principle6b:Fromtheoceanwegetfoods,medicines,andmineralandenergyresources.Inaddition,itprovidesjobs,supportsournation’seconomy,servesasahighwayfortransportationofgoodsandpeople,andplaysaroleinnationalsecurity.
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PREPARATION
BACKGROUND&VOCABULARY
BackgroundInformationEverylivingthingintheoceandependsonenergy.Whenanecosystemisinbalance,allorganismshavesufficientenergyandfoodtosurvive.Whenanimbalanceoccurs,everyorganisminthefoodwebsuffers.Foodpyramidsandfoodwebsareusedtorepresenttheserelationshipsandshowhowenergyandfood(biomass)istransferredandlostbetweentrophiclevels.
PriorKnowledge["foodwebsandtrophiclevels"]
RecommendedPriorActivitiesMappingMarineEcosystemsMarineFoodChainsandBiodiversity
Vocabulary
TermPartofSpeech
Definition
biomass noun livingorganisms,andtheenergycontainedwithinthem.commonname
nounnon-scientificnameofaspecies,orwhattheorganismisusuallycalled.
decomposernoun organismthatbreaksdowndeadorganicmaterial.
ecosystem nouncommunityandinteractionsoflivingandnonlivingthingsinanarea.
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foodchain noungroupoforganismslinkedinorderofthefoodtheyeat,fromproducerstoconsumers,andfromprey,predators,scavengers,anddecomposers.
foodpyramid
noundiagramofahealthydietthatshowsthenumberofservingsofeachfoodgroupapersonshouldeateveryday.
foodweb nounallrelatedfoodchainsinanecosystem.Alsocalledafoodcycle.
habitat nounenvironmentwhereanorganismlivesthroughouttheyearorforshorterperiodsoftime.
predator noun animalthathuntsotheranimalsforfood.prey noun animalthatishuntedandeatenbyotheranimals.
producer nounorganismonthefoodchainthatcanproduceitsownenergyandnutrients.Alsocalledanautotroph.
scientificname
nounthename,usuallyinLatin,ofanorganism'sgenusandspecies.
trophiclevel
nounoneofthreepositionsonthefoodchain:autotrophs(first),herbivores(second),andcarnivoresandomnivores(third).
TermPartofSpeech
Definition
FUNDER
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