Pollution Research Paper

Vol 39, Nov Suppl. Issue, 2020; Page No.(202-206)

A STUDY ON PHYTOPLANKTON SPECIES DIVERSITY OF GOGABIL LAKE WETLAND IN KATIHAR, BIHAR (INDIA)

ANTARYAMI KUMAR ADHISHWAR AND SUNIL KUMAR CHOUDHARY

Abstract

Gogabil Wetland is a part of trans-gangetic plains of land supports higher phytoplankton density and diversity. Chlorophyceae were dominant and had numerical superiority over the others with regard to density and diversity. Shannon and Weaver (1963) diversity index was calculated from the phytoplankton data recorded during the survey (Oct, 2009 - Sept, 2011) and was found to be in the range of 1.94 to 3.18. Species diversity values when compared to the scales of Wilhm and Dorris (1968), and of Staub et al. (1970) suggested the wetland to be slight to light polluted. The higher values of the species diversity in most of the months indicate the absence of the stress factors in those months. The relatively low values during monsoon months may be due to more stressful environment of the wetland.

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