

InterviewSolution
Saved Bookmarks
1. |
Biomagnification is the progressive increase in concentration of harmful non-biodegradable chemical per unit weight of the organisms with the successive rise in different trophic levels in a food chain.Harmful non-biodegradable chemicals include pesticide such as DDT and heavy metals such as mercury arsenic, nickel, cadmium etc. The harmful chemicals get biomagnified in a food chain and affect the human beings and other biotic components of the environment. In a food chain :Water → Plankton → Fish → Fish eating bird, ifDDT enters, its concentration shall increase from plankton to fish.(i) Name the trophic level where biomagnification is maximum.(ii) "Biomagnification the cause, effects and prevention". Give any three talk mentioned by environmentalist on the topic. |
Answer» (i) Biomagnification is maximum in fourth trophic level i.e., fish. (ii) (a) Caused by the use of several pesticides and chemicals for crop protection and storage. (b) It harms the trophic level and causes toxicity and death. (c) It can be prevented by minimizing the use of chemicals in food productivity. |
|