Abstract
Studies on the biodiversity on Kuntbhyog Lake (Himachal Pradesh) were made on species composition and population dynamics of phytoplankton, zooplankton, nekton, productivity in relation to seasonal variations in physico-chemical characteristics of water. Among phytoplankton, members of Bacillariophyceae and Chlorophyceae constituted the dominant group, whereas Cyanophyceae and Euglenophyceae were the subdominant component. Among zooplankton, Rotifera and Arthropoda formed the dominant group, whereas Protozoa Subdominant and Ostracoda were rare in occurrence. The plankton revealed abundance during summer and post monsoon while the minimum number were recorded during winter. Factors affecting the seasonal distribution of organisms have been discussed. Shannon’s Species Diversity and Nygaard’s Trophic State indices have been calculated. On the basis of the hydrobiological characteristics, according to the classification of waters for various purposes given by Central Pollution Control Board (CPCB) (
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