Biogeography Definition - Ecosystems - Biogeography Textbook

Biogeography Definition - Ecosystems - Biogeography Textbook :

Earth phenomena are of two types. They are the living and the non-living. In the two, there are several ecosystems. In the living, there are seven ecosystems and, in the non-living, there are four ecosystems. How an individual organism of the living organisms interacts with its environment can be understood through a study of biogeography.


It is almost 1000 million years since life forms appeared, on the surface of the earth. The first organisms began their lives in the seas. Land organisms appeared soon afterwards. In course of time, almost 3 million (3 x 106 ) plants, animals and micro organisms came into existence. Presently, 1.0 million animals and 0.5 million plants have been identified and classified. There are as yet several organisms that have not been classified. These living organisms are unevenly distributed on the surface of the earth. Each of the ecosystems consists of its own flora and fauna. If these were not living on the earth, the earth would have been a sterile planet.