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Warmup-

Warmup-. Symbiosis Worksheet Get out Homework and turn it in!!. Essential Question-. What happens when humans introduce chemicals into the environment?. Bioaccumulation & Biomagnification. Chemicals in our Environment. Bioaccumulation.

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Warmup-

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  1. Warmup- Symbiosis Worksheet Get out Homework and turn it in!! Essential Question- What happens when humans introduce chemicals into the environment?

  2. Bioaccumulation & Biomagnification Chemicals in our Environment

  3. Bioaccumulation • The gradual buildup, over time, of a chemical in a LIVING ORGANISIM

  4. Why Does This Happen? • Chemicals are taken up faster than they are used Or • Chemicals can’t be broken down by the organism for use

  5. Pollutants Chemical pollutants that are bioaccumulated come from many sources • Pesticides • Industrial Smoke Stacks • Automobile Emissions • Deliberate Discharge of Compounds into Water

  6. Biomagnification • The buildup of substances by successive trophic levels • Example: A predator will have higher concentrations of a chemical compared to its prey DDT Soil(10ppm)Earthworms(141ppm)Robins(444ppm)

  7. 24 units 12 units 6 units 2 units 1 unit

  8. DDT • Dicholoro-diphenyl-trichloroethane • An insecticide used in the 40’s, 50’s and 60’s • entered the environment in run-off from land • Was banned in 1972 after the Bald Eagle population had a noticeable crash.

  9. What is the difference Biomagnification Bioaccumulation

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