Communities & Ecosystems IB Diploma Biology Stephen Taylor Photo: Wasp in Java, by Stephen Taylor ©Wasp in Java.

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Presentation transcript:

Communities & Ecosystems IB Diploma Biology Stephen Taylor Photo: Wasp in Java, by Stephen Taylor ©Wasp in Java

Assessment StatementsObj Define species, habitat, population, community, ecosystem & ecology Distinguish between autotroph and heterotroph Distinguish between consumers, detritivores and saprotrophs Describe what is meant by a food chain, giving three examples, each with at least four linkages Describe what is meant by a food web Define trophic level Deduce the trophic level of an organism in a food chain & food web Construct a food web containing up to 10 organisms, using appropriate information State that sunlight is the initial energy source for almost all communities Explain the energy flow in a food chain State that energy transfers are never 100% efficient Explain reasons for the shape of a pyramid of energy Explain that energy enters and leaves ecosystems, but nutrients must be recycled State that saprotrophic bacteria and fungi (decomposers) recycle nutrients.1 Assessment statements from: Online IB Biology Subject GuideOnline IB Biology Subject GuideCommand terms:

Food webs show all of the feeding relationships within a habitat. Read this research article and generate a food web.this research article The state of the oceans, part 2: Delving deeper into the sea's bounty. John Tibbetts This is a good thing.

Food webs show all of the feeding relationships within a habitat. Read this research article and generate a food web.this research article The state of the oceans, part 2: Delving deeper into the sea's bounty. John Tibbetts This is a good thing.

Food webs show all of the feeding relationships within a habitat.

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