Recently, there was an editorial in the newspaper about 'Rhinoceros in Kajiranga National Park'. These consume foliage in large guanitities and then move to nearby waterbodies and defarcate there. As a result, water bodies witness algal growth and are subsequently getting choked.
(i) What is the possible reasons of algal growth in these water bodies ? Name the process involved.
(ii) What will be the consequence of excessive choking of water bodies with algal bloom ?
(iii) List atleat one step that governmet 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 (commonly called algal bloom). This process is called as eutrophication.
(ii) The algae die and aerobic decomposers in the enthic region become active. They rapidly consume dissolved oxygen of the water to decompose these dead alagae. In the absence of dissolved oxygen, all aguatic 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.