Chapter 5: Our Environment

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Our Environment


What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?


Biological Magnification: It is defined as the accumulation of a particular substance in the body of the organisms present at different trophic levels of the food chain. Chemical pesticides such as DDT are non-biodegradable substances. Once it enters the food chain, it is not digested by metabolism by the organism. Through the food chain, it passes through the successive trophic levels, and at each trophic level the concentration increases. The organisms present at the higher trophic levels will have more concentration of these chemicals due to biological magnification.

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