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Limnology of a Sewage Polluted Tank in Central India
Author(s) -
Unni K. Sankaran
Publication year - 1984
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19840690411
Subject(s) - limnology , alkalinity , environmental chemistry , environmental science , sewage , turbidity , nutrient , nitrate , eutrophication , algae , epilimnion , bloom , ecology , chemistry , biology , environmental engineering , hypolimnion , organic chemistry
The limnology of a sewage polluted pond was studied from 1978 to 1981. Stratification of temperature, dissolved, oxygen, conductivity, pH, alkalinity and chloride was recorded. The surface stratum down to 0.5 m was supersaturated throughout the year. The pond recorded a permanent water bloom dominated by Anacystis during the summer months. This was followed by Anabaena and Anabaenopsis during winter. The growth of Chlorococcales was retarded due to intraspecific competition, self‐shading and low carbon dioxide levels though the waters were nutrient rich. Before the summer overturn, accumulation of calcium bicarbonate produced temporal meromixis. In general, a reduction in the number of zooplankters was recorded.