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Limnological studies on freshwater ponds of Hyderabad, India. IV. The biocenose, periodicity and species composition of unicellular and colonial phytoplankton in polluted and unpolluted environments


, : Limnological studies on freshwater ponds of Hyderabad, India. IV. The biocenose, periodicity and species composition of unicellular and colonial phytoplankton in polluted and unpolluted environments. Hydrobiologia 5, 45 (1) 1-32

Periodicity and species composition of unicellular and colonial phytoplankton was investigated for two years in three freshwater polluted and unpolluted ponds of Hyderabad, India. Periodicity of various taxonomic groups such as Volvocales, Chlorococcales, Desmids, diatoms and blue-greens was found to be related with the fluctuations of the physicochemical parameters of the ecosystem. Factors like temperature, rainfall, nitrates, nitrites, total sulfides, silica, oxidizable organic matter and basic ratio (Na + K/Ca + Mg) were observed to play an important role in the periodicity of phytoplankton. Taxonomic analysis of the commonly occurring phytoplankton resulted in the identification of 138 species.

US$19.90

DOI: 10.1007/bf00006443


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