Consider the following statements with respect to Eutrophication 1 It is the process of deplet...........

Environment and Ecology Water Pollution

Download Solution PDF

Consider the following statements with respect to Eutrophication:

1. It is the process of depletion of oxygen from a waterbody.

2. It occurs due to lack of nutrients which hinders growth of phytoplanktons.

3. It can be controlled and prevented but not reversed.

Which of the statements given above is/are incorrect?

1 and 3 only

2 and 3 only

1 and 2 only

2 only

छोटे Courses बड़े Results

Master Water Pollution

Prepare through Micro-courses

Try Now

Explanation:

? Eutrophication is the process of depletion of oxygen from waterbody occuring either naturally or due to human activities. Organisms such as fishes, plants, etc.on their decay go down in the waterbody and undergo decomposition. Hence, statement 1 is correct.

? It is accelerated further by introduction of nutrients and chemicals by human beings through discharge of domestic sewage, industrial effluents and fertilizers from agricultural field. The consequent nutrient accumulation results into phenomenal growth of phytoplankton and algae thereby reducing the penetration of oxygen, light and heat into the water body. Hence, statement 2 is not correct.

? Eutrophication can be controlled, prevented and even reversed by reducing nutrient flow and adopting pollution clean-up methods. This can be brought about by waste water treatment before discharge, harvesting and removal of algae and removal of dissolved nutrients by physical or chemical methods. Hence, statement 3 is not correct.