What is Eutrophication & how it affects the aquatic life?

What is Eutrophication & how it affects the aquatic life?

■ Eutrophication is the depletion of oxygen in the water bodies due to addition of nitrates & phosphates.

■ The excessive growth of phytoplanktons & algae is called “Algal Blooms”.

## Mechanism.

■ The nitrates or phosphates may get added in water bodies from:

– industrial/ domestic run off

– detergents 

– fertilisers

Due to excessive growth of phytoplanktons & algae there is decrease in the oxygen. It is because when these phytoplanktons & algae die, they get decomposed in the presence of oxygen (i.e. oxygen is absorbed in the reaction) to yield inorganic content, thereby decreasing the oxygen available for aquatic life. This is called hypoxia

## Negative Effects.

■ Due to lack of oxygen the aquatic life is disturbed & leads to killing of fishes.
■ It reduces the aesthetic value of the aquatic ecosystem.

Eutrophication reduces biodiversity.

■ It affects the biodiversity of the aquatic ecosystem negatively.

P.S. Eutrophication can be caused due to human & non-human activities.It occurs naturally due to deposition by the rivers in the ocean, etc.

With Great Love,

Er. Amit Yadav

http://www.stayfoolish.in

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