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Threats to Biodiversity: Endangered Species and Biomagnification

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Presentation Transcript

  1. Warm-Up • Which organism is both a secondary and tertiary consumer? • Where does the energy that drives this ecosystem come from?

  2. Endangered Species • Organisms threatened with extinction • Once extinct, the species is gone forever!! • Caused by hunting, disease, pollution, habitat destruction

  3. Endangered Species • EX: Ivory-billed woodpecker

  4. Ten Animals that May Go Extinct Video

  5. Biomagnification

  6. Biomagnification • Food web magnification • Steady increase in the concentration of harmful substances as the trophic level increases. • Lower trophic levels have smaller concentrations of contaminants than higher levels.

  7. Toxic Chemicals

  8. Biomagnification of DDT Video

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