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Published byNorman Morrison Modified over 9 years ago
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Pond Study Hypothesis Questions Is the pond in Media a healthy ecosystem? How do you know?
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Healthy Ecosystems
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Features of healthy ecosystems Biodiversity Index species
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Biodiversity The variety of plant and animal species in an ecosystem
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Biodiversity and ecosystems The greater the biodiversity, the more stable the ecosystem will be
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Index species A species whose presence tells if water is clean or polluted
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Common Pond Index species Mayflies: clean water
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Common Pond Index Species Caddisfly larvae: Clean water
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Media Pond Index Species Scuds: clean water
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Common Pond Index Species Tubifex worms: Pollution
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Niche review Decomposers Producers Consumers –Herbivores –Predators
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Consumers in the pond Collectors –Gatherers: feed on the bottom –Filter feeders: filter small particles out of the water
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Consumers in the pond Scrapers: graze on algae that is attached to rocks Shredders: break dead plants into smaller pieces
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Consumers in the pond Predators –Grab and eat other animals ●Parasites
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Pond organism sketches View with the dissecting microscope Draw your specimens -4 minimum Label each with the name of the organism, habitat (where you found it), niche, and feeding adaptation Each person makes drawings!
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Work with your field trip group To identify your specimens, use the packets and our class website for help class website
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Discussion questions How many different organisms did you see? Does the pond show biodiversity?
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Food Web Analysis Keystone species: keeps ecosystem In balance
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Food Web Analysis Keystone Species
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