Seasonal Fluctuation of Phytoplankton Population in Jhagrasisa Bheri of East Kolkata Wetland
Authors: Tanusree Datta, A. K. Panigrahi& A. P. Sharma
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Attempt was made to observe the seasonal variation of phytoplankton population along with some parameters on
water quality of Jhagrasisa bheri, one of the wetlands in East, Kolkata, during 2012-2013 where the annual planktonic
population ranged between 5,666.4 and 67,777.7 u/l with a mean value of 23,762.6 u /l.
The observed phytoplankters are within 21 genera belonging to 5 class voice, Chlorophyceae, Cyanophyceae,
Bacillariophyceae, Euglenophyceae and Xanthophyceae. Chlorophyceae and Cyanophyceae are the dominant among all
forms contributing 56.86 and 40.64% respectively of the total population in the ecosystem. The peak abundance of
phytoplankton was registered during post-monsoon with a mean of 26,310.73 u/l, while the lower population was
encountered in monsoon, mean value being 21,393.38 u/l. Among all groups, Euglenophyceae represented minimum
population during the study period, showing 0.55% towards the annual value.