With respect to Cultural Eutrophication of water bodies consider the following statements 1 nbs...........

Environment and Ecology Pollution

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With respect to Cultural Eutrophication of water bodies consider the following statements :-

1. Eutrophication is caused by addition of fertilizers, sewage in water bodies.

2. Because of Eutrophication penetration of sunlight reduces into water bodies.

3. Growth of algal blooms increase the amount of oxygen into water bodies.

Which of the statement(s) given above is/are correct?

1 and 2 only

2 and 3 only

1 only

1, 2 and 3

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Explanation:

• Addition of fertilizers, sewage in water bodies increase the micro nutrients in the water bodies which results in algal bloom which results in eutrophication. Hence, Ist statement is correct.

• Algal bloom come on the surface of water bodies which reduces penetration of sunlight into water bodies. This causes death of aquatic animals and plants. Hence, 2nd statement is correct.

• Algal blooms results in decrease in oxygen as population of algal bloom increases further oxygen is taken up by microorganism which fed on dead algae during decomposition process. Hence, 3rd statement is incorrect.