摘要：Physico-chemical characteristics and phytoplankton diversity of Nagathibelagalu tank of Bhadravathi townwas studied for a period of twelve months from January to December 2008. The estimated water qualityparameters were compared with the standard values prescribed by the Bureau of India Standards (BIS) andWorld Health Organization (WHO). The results of physico-chemical analysis revealed that water is polluteddue to high BOD, free CO 2 , phosphate and nitrate. A total of 44 species belonging to 29 genera of phytoplanktonwere recorded, of which Chlorophyceae and diatoms were found to be dominant among four classes. Pollutiontolerant species such as Scenedesmus sp., Coelastrum sp., Euglena sp., Trachelomonas sp. and Microcystisaeruginosa were observed.
