What is bio-magnifaction? Diagramatically represent the process of bio-magnifaction of DDT in an aquatic food chain.

Explanation

It is the process of accumulation of certain pollutants in tissues, with increased concentration, along the food chain. Most of the pesticides are non big degradable and are persistent and get accumulated in increasing concentration e.g. DDT is insoluble in water and is non-biodegradable. When it is extensively used, it goes into the soil through the rainwater. From the soil, DDT passes into plants, in which DDT is found to be more concentrated than in soil. Experiments have revealed that in a food chain, DDT becomes more and more concentrated and accumulated when it passes from the lower to the higher trophic levels. The accumulation and concentration of DDT in each trophic level, on an average, increases by ten times.