Knowledge mining for the differentiation pattern with respect to the productivity and trophic status of some selected lakes of Western Himalayas

The present study deals with an account of the primary productivity and trophic status Rewalsar, Kuntbhyog, Prashar lakes Western Himalayas. Seasonal variations in gross (GPP) (g C m –2 day –1 ), net (NPP, respiration (R), NPP/R ratio have been studied compared hydrobiological factors. Among various factors, temperature, light, nutrients, chlorophyll a were accountable for high productivity. Nygaard’s state indices calculated. GPP showed positive relationship water penetration nitrate, phosphate. extensive range compound index observed Rewalsar (12.00–20.00) Kuntbhyog (12.50–18.00) confirmed their eutrophic nature. Based on classification waters basis productivity, indices, richness could be categorized as eutrophic, whereas Lake, oligo-eutrophic. presence, absence, frequency appearance, abundance different organisms recorded during investigation, bioindicators determined.