Journal of Environmental Biology

Studies on seasonal and topographical variations of
periphyton in the rivers of Manipur

S.D. Gurumayum¹* and U.C. Goswami²

¹Zoological Survey of India, Gopalpur on Sea - 761 002, India

²Department of Zoology, Gauhati University, Guwahati - 781 014, India

*Corresponding Author email : santaguru@rediffmail.com

Publication Data

Paper received:

07 September 2011

Revised received:

01 February 2012

Re-revised received:

05 July 2012

Accepted:

27 July 2012

Abstract

Seasonal and topographical variations of abundance and quality composition of periphyton at up and down stream of Imphal, Thoubal and Khuga rivers were studied from 1999-2002. It was found that periphyton population was high (3,055-53,450 u cm^-2) and fluctuated in a wide range. Upper stretches (3053-53,450 u cm^-2) of the rivers have higher periphyton population and showed definite seasonal fluctuation than the middle and lower stretches (3,276-16,320 u cm^-2). Species richness was also higher in upper stretches in comparison to lower stretches of all the rivers. Bacillariophyceae dominated the periphyton population and contribution of Cyanophyceae was nominal. Shannon and Weaver species diversity index was within the favorable range and evenness value for all the rivers were near unity and reflected a stable and unpolluted aquatic environment of the rivers.

Key words

Periphyton, Species diversity index, River

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