Diversity of Zooplankton in Lesser Himalayan River Gaula at District Nainital Uttarakhand

Rajni Mehra, Ranjeeta Arya

Abstract


ABSTRACT

Zooplankton are small, microscopic, free-floating and weakly swimming animals found in all aquatic environments. They play an important role in aquatic food web and act as a vital food source for secondary and tertiary consumers. They also help to transfer energy lower to higher trophic level of organisms. Due to their shorter life span, large density, drifting nature and high species diversity they are being considered as indicator organisms for the physical, chemical and biological processes in the aquatic ecosystem. The present study was carried out on diversity of zooplankton in a lesser Himalayan river Gaula at Dist. Nainital Uttarakhand. A total 18 species of zooplankton were recorded in which 7 belong to Protozoa, 6 to Rotifera, 2 to Copepoda, 2 to Cladocera and 1 was belong to Ostracoda. Among them Protozoa was the most abundant group throughout the study period. During the present study it has been found that seasonal abundance of Zooplankton was highest during summer, moderate in winter and lowest during monsoon season.

 

Keywords: Zooplankton, Species Diversity, Abundance, Seasonal Distribution, Organisms, aquatic ecosystem.


Keywords


Zooplankton, Species Diversity, Abundance, Seasonal Distribution, Organisms, aquatic ecosystem.

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