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Biomagnification

Biomagnification. March 23, 2010. Biomagnification:. A greater amount  of a substance (toxic chemicals) in an  organism (I.e. fish) moves higher up the  food chain. How are toxins affecting animals?. 1) Mutations, deformities. 2) Extinction.

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Biomagnification

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  1. Biomagnification March 23, 2010

  2. Biomagnification: • Agreateramount of asubstance (toxic chemicals) in an organism(I.e. fish) moves higher up the food chain

  3. How are toxins affecting animals? 1) Mutations, deformities

  4. 2) Extinction • Osprey birds going extinct because some males can no longer produce

  5. 3) Death

  6. “Gender Bending Frogs” • Some of us may think these are not things we need to worry about, but… • This is an issue that is still with us today, and maybe getting worse video

  7. 1) Weed killers: • Common weed killer is Atrazine: castrates male frogs and turns them into females that lay eggs 2) Birth control pills • Estrogen in pills • When released into water system, contaminates water with estrogen • Frogs thin layer of skin

  8. Fish Changing Sex

  9. Birth Control Pills and Fish change video

  10. Beluga Whales

  11. Polar Bears • Toxins reaching the Arctic • Wales, seals, and polar bears have increased values of toxic chemicals in them • Increased amounts of PCBs (polychlorinated biphenyls)

  12. x x x x x x x x x x x x x x x x x x x x x x How Biomagnification Works 108x 36x 36x 36x 12x 12x 12x 4x 4x 4x 4x 4x 4x 4x 4x 4x

  13. Affects on Humans: Fish Tainted Tuna Salmon

  14. 2007 Health Canada finally issued a limit to eating canned tuna

  15. Mercury in Fish

  16. More toxic food…

  17. Activity: • Groups of 5

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