Nature Environment and Pollution Technology

Lalita Sukhija ¹

Affiliations
1 Department of Zoology, Government College, Ajmer, Rajasthan, IN

Abstract

The study of physicochemical characteristics indicates the nature of the Foy Sagar lake water is alkaline, moderately hard and nutrient rich with low value of dissolved oxygen. Most of the nutrients exhibit maximum concentration in summer months. The water quality is deteriorating rapidly due to intense human activities and infusion of pollutants from the surroundings. These include silt, dissolved solids and nutrients like phosphates, nitrates and chlorides etc. Among the zooplankton, rotifers are good indicators of water quality. Rotifers of genus Brachionus and Keratella are abundant in water of Foy Sagar lake. The species composition and species diversity also point towards the polluted nature of the lake water.

Keywords

Foy Sagar Lake, Zooplankton, Water Quality, Eutrophication.

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Lalita Sukhija ¹

Affiliations
1 Department of Zoology, Government College, Ajmer-305 001, Rajasthan, IN

Abstract

The paper highlights the studies of plankton composition in relation to physico-chemical characteristics of a freshwater lake at Kayad about 10 km away from Ajmer city. The biotic interference in the lake affects the water quality, bringing changes in the physico-chemical parameters, which directly influence the biotic composition of zooplankton. Water temperature showed minimum value of 18°C during winter and 35°C during monsoon. pH was minimum (7.2) during early summer and highest (8.7) during winter. Dissolved oxygen was maximum (10.87 mg/L) during winter and minimum (2.82 mg/L) during spring. The zooplankton of Kayad lake exhibited luxuriant growth in spring and monsoon, whereas, they were less abundant in summer season.

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