What is Eutrophication? Discuss the phenomenon of accelerated eutrophication.

Explanation

Eutrophication is defined as the natural aging of a lake by biological enrichment of its water, water in a young lake is cold and clear to support life, with time, it is enriched with nutrients by streams draining into it."This encourages growth of aquatic life-plant and animal life. Organic remains deposite at the bottom of the lake and with time makes the water warmer. Eventually, floating plant develop in the lake, finally converting into land.
Accelerated eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage.
i) Large amount of nutrient in water causes excessive growth of planktonic algae (called algal bloom) which impart characteristic colour to water bodies.
ii) Depletion of oxygen content of water leading to the death of the aquatic organisms.