Communities & Ecosystems Stephen Taylor

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Presentation transcript:

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

Assessment Statements Obj. 5.1.1 Define species, habitat, population, community, ecosystem & ecology. 1 5.1.2 Distinguish between autotroph and heterotroph. 2 5.1.3 Distinguish between consumers, detritivores and saprotrophs. 5.1.4 Describe what is meant by a food chain, giving three examples, each with at least four linkages. 5.1.5 Describe what is meant by a food web. 5.1.6 Define trophic level. 5.1.7 Deduce the trophic level of an organism in a food chain & food web. 3 5.1.8 Construct a food web containing up to 10 organisms, using appropriate information. 5.1.9 State that sunlight is the initial energy source for almost all communities. 5.1.10 Explain the energy flow in a food chain. 5.1.11 State that energy transfers are never 100% efficient. 5.1.12 Explain reasons for the shape of a pyramid of energy. 5.1.13 Explain that energy enters and leaves ecosystems, but nutrients must be recycled. 5.1.14 State that saprotrophic bacteria and fungi (decomposers) recycle nutrients. Command terms: http://i-biology.net/ibdpbio/command-terms/ Assessment statements from: Online IB Biology Subject Guide

Food webs show all of the feeding relationships within a habitat. Read this research article and generate a food web. 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. 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.

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

i-Biology.net Please consider a donation to charity via Biology4Good. Click here for more information about Biology4Good charity donations. @IBiologyStephen This is a Creative Commons presentation. It may be linked and embedded but not sold or re-hosted.