Answers

ANTHONI
Aug 3, 2020

The inflow of large amounts of nutrients like nitrates and phosphates initially encourages growth of aquatic organisms, plants and animals. With time as the organic  matter increases, debris along with silt piles up at bottom making the water body shallower and warmer. This leads to gradual appearance of floating and marshy plants  and is eventually converted into lake. Hence, the aquatic life gets severely affected and disrupted.

This phenomenon is called eutrophication. It may be natural or artificial due to result of human activities.