Write a note on extinction and its types.

Explanation

Species is considered extinct when none of its members are alive anywhere in the world. If individuals of a species remain alive only in captivity or other human controlled conditions, the species is said to be extinct in the wild . In both of these situations, the species would be considered globally extinct. A species in considered to be locally extinct when it is no longer found in an area it once inhabited but is still found elsewhere in the wild.
Type of extinctions:
(i) Natural extinction is a slow process of replacement of existing species due to change in environmental conditions, evolutionary change, predators can get extinct sooner than the large population due to inbreeding depression (less adaptively and variation).
(ii) Mass extinction: The earth has experienced quite a few mass extinctions like hunting. habitat destruction, over exploitation, urbanization and industrialization . Some examples of extinctions are Dodo of Mauritius and Steller's sea cow of Russia. Amphibians seem to be at higher risk of extinction because of habitat destruction.