Author(s):

Kumari Anjana

Abstract: Biological seasonal diversity and ecosystem effect is the result of the evolutionary plasticity of living organisms and increased geometrically through perhaps 2.5 billions years, proliferating by trial and error, controlled by natural selection, filling almost every one of the habitable ecological riches created in a likewise evolving world environment. Our paleontologists tell us that the numbers of species existing has fluctuated widely how widely we can never know with any certainty. The causes of these fluctuations have been subject to much speculation varying from gradual and normal climatic change to catastrophic changes even as great as the impact of a hypothetical gigantic meteor or asteroid with the terrestrial globe (Fosberg, 1986).

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