POPULATION DYNAMICS AND SPECIES DIVERSITY OF PLANKTON IN RELATION TO HYDROBIOLOGICAL CHARACTERISTICS OF RIVER SUTLEJ, PUNJAB, INDIAC. Sharma, R. Jindal, Uday Bhan Singh, A.S. Ahluwalia and R.K. Thakur
The present ecological study on the river Sutlej at Ropar Headworks (30°32 N; 76°78 E) deals with the seasonal variations in abundance and population dynamics of phyto- and zooplankton in relation to hydrobiological conditions, and assessment of water quality of the river. Phytoplankton were composed of members of Bacillariophyceae, Chlorophyceae, Cyanophyceae and Euglenophyceae, and the Zooplanktons were Protozoa, Rotifera and Crustacea. In all 43 species of planktons were recorded. Bacillariophyceae among phytoplankton, and Rotifera among zooplankton showed highest abundance and diversity. The values were maximum during summer and post monsoon, and minimum during winter and monsoon. The values of Berger-Parker Dominance Index, Margalef Richness Index, Simpson and Shannon-Wiener diversity indices were calculated. The physico-chemical parameters like pH, DO, BOD, nitrate, phosphate, TDS, total alkalinity and total hardness were within the permissible limits of various regulatory agencies.
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