SEASONAL VARIATION IN DIVERSITY OF PHYTOPLANKTON OF KOMEN LAKE IN MEGHALAYA, INDIAPranita Hajong and Papiya RamanujamAbstract The present investigation was undertaken to study the phytoplankton diversity and physico-chemical analysis of Komen lake during March 2019 to February 2020. Seasonal changes in diversity were observed. Total 124 species belonging to 7 classes were recorded. Diversity was maximum in spring with 1.49 and low in monsoon with 0.85. Chlorophyceae was dominant group among the 7 classes. Seasonal changes were also observed in distributional pattern of phytoplankton. Chlorophyceae and Zgynematophyceae were high during spring season and their numbers of species were low in monsoon. It shows seasonal fluctuation in temperature, turbidity, biochemical oxygen demand, nitrate and phosphate and these nutrients concentration were maximum in monsoon due to runoff of water from the agricultural, forest and residential area and negatively impact the distributional pattern of phytoplankton of the lake. |