4. What is the impactance of wildlife ? What are
the factors responsible for their depletion?

Explanation:

1) Loss of Wildlife Species Eventually leads to Extinction of a Particular Set of Animal Species. Normally in The Wild, if the Animals do not get adequate Food or Water during a Famine or drought they will perish without Human or a Country’s Forest Department’s assistance.

2) Similarly, in Forest Fires, Many Plants, Trees, Birds, Reptiles, Insect species & Animals get Engulfed by fire – So they will also lose their lives if the Forest fires are not doused on time.

3) Deforestation and Habitat Loss due to Developmental Works & Timber related Tree felling carried out by Human beings also cause untold damage to an Ecosystem and Many Animals are deprived of their Forests and a Safe abode.

4) Hunting and Poaching of Animals also causes a Depletion of a Species of animals in number count.

5) Uncontrolled Fishing and Over Exploitation of Marine resources by Humans are also responsible for Extinction of Aquatic & Amphibious varieties of Animals & reptiles.

6) Releasing Toxic Pesticides & Industrial Effluents leads to Toxicity of Water bodies like Rivers, Lakes & Water bodies and a Lower Biochemical Oxygen Demand will result in Elimination of Aquatic life.

All of these causes lead to Depletion of Wild animals and their Former Habitats (Forests, Grasslands, Plains, Valleys) are completely Wiped out and taken over by Human beings for Real Estate Projects, Railways, Roads, Industries, Aerodromes, Yards etc.