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ID:27170633
大小:3.49 MB
页数:16页
时间:2018-12-01
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1、CarnivorousPlants:ScienceFictionorScience??Whatintheworldisacarnivorousplant?Mustbeabletoattract,captureandkillanimals(mostlyinsects)AlsomustdigesttheanimalCansurvivewithouteatingmeat,though.Mostaresmall(<1mtall)butonevinespeciescangrowtobe10mlongWhereintheworldcanIfindtheseplants?Everywher
2、eexceptAntarctica!!MoreabundantinAustralia,southeastAsiaandNorthAmericaEvenAlachuacountyhasthem!!600speciesandsub-species,butnotallrelatedtoeachotherLet’sReview...1)Whatarethe4traitsofacarnivorousplant?Theyattract,capture,killanddigestanimals2)Donon-carnivorousplantsshareanyofthesetraits?Non
3、-carnivorousplantscanattractinsects3)Dotheyneedtoeatmeattosurvive?No-theyhavebeengrowninlabswithoutmeat4)Whereintheworldcanyoufindtheseplants?EverywhereexceptAntarctica5)Howmanyspeciesarethere?Aretheyallrelated?600speciesandsub-species;theyarenotallrelated(convergentevolution)Whathabitatdoth
4、eylivein?ThegenusUtriculariaisaquatic(freshwater)Mainlyfoundinnutrientpoorwetlands(ex.Bogs)DecayingplantsreleaseacidiccompoundsMicroorganismscannotfunctionDifficultforplantstogetnutrientsfromacidicsoilWhyaren’tallplantsmeat-eaters?Carnivorousplantshaveanadvantageovernon-carnivorousplantsinnu
5、trientpoorhabitatsInhabitatswithmorenutrients,non-carnivorousplantsdobetterbecausetheydonothavetoputenergyintospecialstructures.Let’sReview...1.Whatisthemostcommonhabitatofcarnivorousplants?Nutrientpoorwetlands.2.Whatfeatureoftheirhabitatallowedthemtoevolvecarnivory?Thelackofnutrientsavailab
6、leinthesoil.3.Whydoesthehabitathavethisfeature?pHofwaterislow,sobacteriacannothelpdecomposeplantsandplantscannottakeupnutrientsaseasily.4.Whydonon-carnivorousplantsdobetterinhabitatswithmorenutrients?Becausetheydonothavetoputenergyintospecialstructurestocapturepreylikecarnivorousplantsdo.Wha
7、tanimalsdotheyeat?MostlyInsectsandspiders(gnats,flies,moths,wasps,spiders,butterflies,beetlesandants)FreshwaterspecieseatsmallwateranimalsandfishandmosquitolarvaeSomecapturesmallamphibians(frogs)andsmallbirdsandrodentshavebeenfoundinsometropicalspe
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