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DDT and BIOMAG
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Lab Comprehension Why would it be better for you to eat anchovies (small fish) than it would be for you to eat tuna fish (large fish)?
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SO… as you move UP the food chain …
WHAT things (2) DECREASE? Give me (2) examples (general groups) of DECOMPOSERS and explain their PURPOSE in the ecosystem. VENN DIAGRAM : niche and habitat WHAT are chemoautotrophs AND where would you find them (2)? DEFINE trophic level. What BIOME do we live in?
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Q: There is a factory along the lake that produces industrial chemicals…it is rumored that the factory leaks poison into the lake. Why would you not want to eat the fish from that lake?
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BIOACCUMULATION / BIOMAGNIFICATION
Pollutants move up the food chain and increase at each trophic level.
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BIOMAGNIFICATION- processes in an ecosystem where higher concentrations of environmental pollutants (chemicals), such as the pesticide DDT, increase in concentration in organisms higher up the food chain. Generally through a series of prey-predator relationships. Eats 10 Herring Eats 7 Zoo-plankton Eats 5 phytoplankton..
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DDT Di chloro di phenyl tri chloro ethane : - Synthetic pesticide
Pre diagram video Post - Biomag video Di chloro di phenyl tri chloro ethane : - Synthetic pesticide - Developed to protect soldiers in WWII from malaria and typhus - Rachel Carson’s Silent Spring, 1962 - banned as farming pesticide world wide, still controversially used as a disease vector control.
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DDT One of the reasons that DDT did not affect people is because it is not easily absorbed through the skin. A study in 1968 showed that Americans were consuming an average of mg a day! Silent Spring
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DO WORKSHEET
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