What causes eutrophication and how does this occur?

The growth of algal bloom in the nearby water bodies of the agricultural fields due to excess of the nutrients is called as eutrophication.

This is caused due to the excessive use of fertilizers in the fields. The excess of fertilizers gets run off to the nearby water bodies which lead to the growth of the algae.

The algae forms a layer on the upper surface of the water that decreases the oxygen concentration in the water that adversely affects the life of other aquatic life forms in it.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

it’s lava came from an explosive eruption