Abstract
The significance of Keenjhar Lake is due to irrigation, wild life sanctuary and supply of drinking water to the local population at vicinity. The objective of present studies was organized to explore the primary productivity and physicochemical properties of Keenjhar Lake. In present study 210 planktonic species were identified they belongs to 11 classes and 85 genera. Out of them 173 species were phytoplanktonic, 83 Cyanophyceae, 57 Chlorophyceae, 24 Bacillariophyceae, 5 Euglenophyceae, 2 species of Dinophyceae and 1 specie belonged to each Xanthophyceae and Chrysophyceae respectively. Whilst, a part of them 37 species were belonged to zooplankton comprising 15 species each of Cladocera and Rotifera, 4 species of Ostracoda and 3 species of Copepoda. The physicochemical properties such as (temperature, alkalinity, dissolved oxygen, electrical conductivity, total dissolved solids, and pH) were recorded from keenjhar lake district, Thatta, Sindh, Pakistan, range between 33.1-18.5°C, 223-170 mg L-1, 9.6-6.9 mg L-1, 512-350 µS cm-1, 410-270 mg L-1, and 8.9-7.6 respectively on monthly basis. The physicochemical properties of Keenjhar Lake were suitable for growth of aquatic biota.
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