Government efforts have resulted in increase in population of rhinoceros in some pockets in Northeast region of our country. These mammals consume foliage in large quantities and them move to nearby small water bodies where they defaecate. Recently these water bodies are witnessing algal blooms (or growth) and are getting ultimately chocked of affecting even activities of rhinos.
(i) What is possible reason of algal growth in these water bodies? Name the process involved.
(ii) What will be consequence of excesive choking of water bodies with algal bloom.
(iii) List atleast one step that government must take to save such water bodies.

Explanation

(i) Faecal matter of rhinoceros provides extra nutrients in the water body. As a result there occurs excessive growth of algae (called algal bloom). This process is called eutrophication.
(ii) Algae die and aerobic decomposers in the benthic region become active. The rapidly consume dissolved oxygen of the water to decompose these dead algae. In the absence of dissolve oxygen, all aquatic life (including fishes) will die. In this way, eutrophication deprives us of one of our sources of food.
(iii) Government must take immediate steps to clean these water bodies by removing algae as well as sediment (slit).