STUDIES ON PHYTOPLANKTON RELATED DIVERSITY INDEX OF RIVER SHARDA(UTTARAKHAND).

Phytoplankton are an integral component of the aquatic ecosystem. Being at the base of an aquatic food chain, these are responsible for almost all the primary production altered in any aquatic ecosystem. The numerical relationship among species, their communities, population often provide a better and reliable detection of pollution with compare to a single species. In the present investigation phytoplanktonic species composition,Shannon-Weiner information function of diversity and Simpson’s dominance index was computed.