Question

Write short note on eutrophication

Answer 1

fertilizers, insecticides and pesticides pollute agricultural water. so, waters of rivers, ponds, lakes, canals are polluted as run-off from agricultural lands flow to these water bodies. nitrogen and phosphorus of fertilizers accumulate and help in the growth of algae in these water bodies which results in the depletion of oxygen in water, which again effects pollution of fish and other aquatic animals. this reduction of oxygen level in water is called eutrophication.

Answer 2

Answer:

Eutrophication

It is referred to the natural ageing process of a lake as a result of nutrient enrichment caused by the overflow of nutrients such as fertilizers, animal wastes and sewage from land leading to an increased fertility of the lake. Consequently, there is a huge increase in the primary productivity of the ecosystem bringing about an increased growth of algae, hence in algal blooms. After sometime, the decomposition of these algae reduces oxygen supply, resulting in the death of aquatic animal life.