Bioaccumulation biomagnification
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Bioaccumulation & Biomagnification. Chemicals in our Environment. Bioaccumulation. The gradual buildup , over time, of a chemical in a LIVING ORGANISIM. 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.

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Bioaccumulation & Biomagnification

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Bioaccumulation biomagnification

Bioaccumulation & Biomagnification

Chemicals in our Environment


Bioaccumulation

Bioaccumulation

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


Why does this happen

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


Pollutants

Pollutants

Chemical pollutants that are bioaccumulated come from many sources

  • Pesticides

  • Industrial Smoke Stacks

  • Automobile Emissions

  • Deliberate Discharge of Compounds into Water


Biomagnification

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)


Bioaccumulation biomagnification

24 units

12 units

6 units

2 units

1 unit


Bioaccumulation biomagnification

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.


What is the difference

What is the difference

Biomagnification

Bioaccumulation


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