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Communities and Ecosystems

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For the IB Biology course.

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Communities and Ecosystems

  1. 1. Communities & EcosystemsIB Diploma BiologyStephen TaylorPhoto: Wasp in Java, by Stephen Taylor ©
  2. 2. Assessment Statements Obj.5.1.1 Define species, habitat, population, community, ecosystem & ecology. 15.1.2 Distinguish between autotroph and heterotroph. 25.1.3 Distinguish between consumers, detritivores and saprotrophs. 25.1.4Describe what is meant by a food chain, giving three examples, each with atleast four linkages.25.1.5 Describe what is meant by a food web. 25.1.6 Define trophic level. 15.1.7 Deduce the trophic level of an organism in a food chain & food web. 35.1.8Construct a food web containing up to 10 organisms, using appropriateinformation.35.1.9 State that sunlight is the initial energy source for almost all communities. 15.1.10 Explain the energy flow in a food chain. 35.1.11 State that energy transfers are never 100% efficient. 15.1.12 Explain reasons for the shape of a pyramid of energy. 35.1.13Explain that energy enters and leaves ecosystems, but nutrients must berecycled.35.1.14 State that saprotrophic bacteria and fungi (decomposers) recycle nutrients. 1Assessment statements from: Online IB Biology Subject GuideCommand terms: http://i-biology.net/ibdpbio/command-terms/
  3. 3. 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 seas bounty.John TibbettsThis is a good thing.
  4. 4. 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 seas bounty.John TibbettsThis is a good thing.
  5. 5. Food webs show all of the feeding relationships within a habitat.
  6. 6. Food webs show all of the feeding relationships within a habitat.
  7. 7. i-Biology.netThis is a Creative Commons presentation. It may be linked and embedded but not sold or re-hosted.Please consider a donation to charity via Biology4Good.Click here for more information about Biology4Good charity donations.@IBiologyStephen

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