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IJSTR >> Volume 9 - Issue 3, March 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

A First Report On The Plankton Status Of

[Full Text]



Vattakkayal Lake, Kerala, Sherly Williams E, Nisha Thomas P Vineetha S



Biodiversity, Eutrophication, Phytoplankton, Pollution, Vattakkayal Lake, Water quality, Zooplankton.



The biota of an aquatic system directly reflects the productivity potential and health of the ecosystem. Many groups of organisms have been studied to assess water quality and the impact of environmental change. In the present study an attempt has been made to assess the seasonal variations in the diversity and abundance of plankton community of Vattakkayal Lake in the Maruthady area under corporation of Kollam. A total of 57 species of phytoplankton and 23 species of zooplankton were identified from different classes for a period of one year (February 2018 – January 2019) under three seasons, pre-monsoon, monsoon and post- monsoon. Among the phytoplankton species identified, Bacillariophyceae (35.41%) formed the dominant group, followed by Chlorophyceae (27.52%), Cyanophyceae (23.10%) and Euglenophyceae (13.97%), while the Zooplankton species consisted of 35.8% Rotifera, 23% Protozoa, 21.2% Copepoda and 15.7% Cladocera and the least Ostracoda (4.2%). Bacillariophyceae and Rotiferas were the dominant group among phytoplankton and zooplankton respectively with respect to diversity and population density status. This study revealed that the plankton diversity was found to be maximum during pre- monsoon season, followed by post-monsoon and monsoon. Dominance of the pollution indicators like Closterium sp., Nitzschia sp., Navicula sp., Oscillatoria sp., Microcystis sp., and Brachionus sp., indicate that this lake is under severe threat of organic waste. Shannon diversity index was used to establish the seasonal variation in plankton diversity.



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