SEASONAL FLUCTUATION OF PHYTO AND ZOOPLANKTONS OF PONNERI TANK (CHOLAGANGAM) ARIYALUR DISTRICT, TAMIL NADU, INDIA

Author(s): S. Ravi Sankar, R. Rengarajan* and P. Mariappan

Abstract: A study was undertaken to record the seasonal fluctuation in phyto and zooplankton population in Ponneri Tank (Cholagangam) in Udayarpalayam Taluk, Ariyalur District, Tamil Nadu, India, for a period of two years (January 2015 to December 2016). In this study, 10 species diatoms (Bacillariophyceae), 12 species of blue green algae (Cyanophyceae), 15 species of green algae (Chlorophyceae) and 16 species of zooplanktons were recorded. In the present observation, Navicula sp. (Bacillariophyceae), Oscillatoria sp. (Cyanophyceae), Spirogyra varians (Chlorophyceae) and zooplankton rotifers were found to be dominant groups. Plankton density and diversity is higher in summer then the winter and monsoon seasons.

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