Question

DDT content in the water of a lake that supplies drinking water to the near by villages,is found to be 0.003ppm.The kingfishers of that area are reported to have 2ppm of DDT.What has the concentration increased in these birds ? what harm will this cause to the bird population ? Name this phenomenon

Answer 1

Answer:

This phenomenon is known as Biomagnification.

Explanation:

It is the process by which, harmful chemicals, like pesticides get accumulated in the fatty tissues of the animals like, areolar tissues, when animals eat that plant. The pesticides do not get metabolize and gets accumulated and then, those animals are eaten by their predators. The concentration of these chemicals increases about 10 times at every trophic level. Pesticides like, DDT are banned and some pain killers caused Biomagnification in vultures, resulting in their deaths due to liver disorders, making them endangered species. This case is very known.