Diversity of cyanobacteria in some polluted aquatic habitats and a sulfur spring in the Western Ghats of India
Rajeshwari, Karanth R.; Rajashekhar, Madaiah
Relationships between physico-chemical factors of waters and species richness of the cyanobacterial communities in five polluted aquatic habitats and a sulfur spring in the Western Ghats of Karnataka, India were analyzed statistically. The multiple regression analysis showed that the total number of species versus temperature is highly significant. Correlation between cyanobacterial species and sulphate content was also highly significant. The similarity in the cyanobacterial diversity between different polluted water bodies and the sulfur spring was evaluated by Sorensen's index. Generally, the indices of similarity in the cyanobacterial flora between the sites of same aquatic habitats were high. However, between the sites of different aquatic habitats, the indices of similarity were low. The variation in temperature, pH, dissolved organic matter, sulphate, nitrate and phosphate contents of the waters of these habitats are thought to be the reasons for the differences in these habitats. Microcystis aeruginosa was found to be the most abundant species.