Explain accelerated eutrophication. Mention any two consequences of this phenomenon.

Accelerated eutrophication occurs due to the passage of sewage and run-off from fertilized fields into ponds, lakes and other water bodies. Nutrients present in sewage and fertilizers causes dense growth of plants and planktonic algae. 

Consequences of accelerated eutrophication : 

(i) Eutrophic water bodies support excessive growth of floating plants, e.g., water hyacinth is one such plant that sometimes chokes ponds, lakes and rivers. 

(ii) Due to increase of algal blooms, there is drastic decrease in oxygen replenishment inside water that kills aquatic animals.

Accelerated eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage.

Its consequences are: 

(i) Large amount of nutrients in waters causes excessive growth of planktonic (free-floating) 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.

Accelerated eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage.

Consequences are: 

i. Large amount of nutrients in waters 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.