Industrial effluents and domestic sewage seriously affect fresh water

1.	Industrial effluents and domestic sewage seriously affect fresh water bodies. For protecting aquatic life Govt, of India recently declared an animal as National aquatic animal.(a) Identify the animal.(b) Distinguish biomagnification from eutrophication.
Answer» (a) Dolphin (b) Bio magnification is the increase in the amount of non biodegradable substance in successive trophic level in a food chain. Eg: DDT Eutrophication is the overgrowth of aquatic plants as a result of accumulation of nutrients in water body.

Industrial effluents and domestic sewage seriously affect fresh water bodies. For protecting aquatic life Govt, of India recently declared an animal as National aquatic animal.(a) Identify the animal.(b) Distinguish biomagnification from eutrophication.

Answer»

(a) Dolphin

(b) Bio magnification is the increase in the amount of non biodegradable substance in successive trophic level in a food chain.

Eg: DDT Eutrophication is the overgrowth of aquatic plants as a result of accumulation of nutrients in water body.