Question

A food chain in a polluted aquatic ecosystem is given. Observe it and answer the following questions. Fresh water → Algae Fishes → Birds.(i) Which organisms are disturbed more due to biomagnification? Why? (ii) This ecosystem will be destroyed gradually due to biomagnification. Why?​

Answer 1

Answer:

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Explanation:

(i) (a) Birds are disturbed more due to bio-magnification.

(b) As the birds occupy the top most level in the given food chain, the maximum concentration of harmful chemicals causing bio-magnification get accumulated in their body.

(ii) (a) Bio-magnification is the process of accumulation of non-degradable chemicals in the various tropic levels of food chains.

(b) As the chemicals are non-degradable or cannot be washed, they cannot be removed from the organisms of the food chain. This leads to gradual destruction of the ecosystem.