Biomagnification - Last Lab

Biomagnification - Last Lab - Bio 141 Bioaccumulation and...

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Bio 141 Bioaccumulation and Biomagnification Several of the inputs in modern agricultural practice are materials that are not found in nature. These inputs include insecticides, herbicides, and fungicides. Many of these chemicals are persistent, which means that they do not break down for long periods. Persistent chemicals can bioaccumulate (accumulate in biological tissues, such as fat) and biomagnify (become more concentrated in certain organisms). This simple exercise will help demonstrate the process of bioaccumulation and biomagnification. A. Your instructor will assign you to a particular category of organism. In this simulation, organisms are classified according to their trophic level-that is, according to what they eat. Producers are plants or plant-like organisms that perform photosynthesis. Primary consumers consume producers cliredly; these are also commonly known as herbivores. Secondary con- sumers consume primary consumers; these are commonly known as carnivores or predators. B. Each producer will now begin photosynthesizing and producing sugar for its own use, as well as excess sugar that is available for primary consumers. These excess "packets" of
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This note was uploaded on 09/23/2011 for the course BIO 141 taught by Professor Brown during the Fall '08 term at Drexel.

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Biomagnification - Last Lab - Bio 141 Bioaccumulation and...

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