SEASONAL VARIATION OF PHYTOPLANKTON IN FOUR STATIONS OF VIJAY SAGAR LAKE OF MAHOBA (U.P.)

The present paper is aimed at evaluating phytoplankton indicators as water quality and pollution status of fresh water body, Vijay Sagar Lake. This paper reports 21 species, and 36 genera, among them 9 species belong to Chlorophyceae, 7 to Bacillariophyceae, 5 to Myxophyceae in which Chlorophyceae were dominant. Ulothrix, Pediastrum and Protococcus and many members of Cyanophyceae are indicators of meso eutrophic status of the water bodies. The present observation shows that water body was highly polluted in summer and moderately polluted in monsoon. The dominant species were found to be Anabaena, Microcystis, Tetraspora, Pediastrum, Navicula, and Nitzschia. The algae that become prominent in addition to bloom forming species as eutrophication proceeds may be planktonic, floating periphytic as Spirogyra, Zygnema, as well as some Diatoms being dominant. According to these observations Vijay Sagar lake is in transition state between mesotrophic and eutrophic, so termed as meso-eutrophic.