Abstract
Selected physico-chemical parameters and a taxonomic survey of fresh water algae in lotic water bodies of river cauvery in and around Mysore district were carried out between 2008 and 2009. The quantitative and qualitative analyses of chlorophyceae and bacillariophyceae have revealed the presence of 21 taxes respectively. The maximum chlorophyceae and bacillariophyceae species were found at stations D1 and R1 and minimum at stations BD2 and BD3 respectively. Decreased diversity of chlorophyceae and bacillariophyceae were noted at sites receiving urban waste and agricultural effluents. Higher pH, Turbidity, COD, chloride, and Iron coupled with low concentration of total alkalinity, total hardness and heavy metals favours growth of chlorophyceae and bacillariophyceae species. The environmental variables seem to play an important role in determining the species richness and diversity in the Cauvery River.
Key words: Chlorophyceae, bacillariophyceae, environmental variables, Cauvery River, Mysore.
