Abstract
Saroornagar Lake is one of the major fresh water-bodies of Hyderabad. The study deals with the influence of physico-chemical parameters on the distribution and diversity of Euglenophyceae. Samples were collected from four sampling stations for a period of two years and comprehensive physico-chemical analysis was carried out. Linear multiple regression analysis (MRA) has been carried out with SPSS software to evaluate the importance of various physico-chemical variables on the growth and development of Euglenophyceae. The physico-chemical parameters played an important role in distribution and diversity of algae. The growth of Euglenophyceae was positively influenced by sulphates, Free CO2, calcium, total hardness, COD and bicarbonates. Negative influence on euglenoids was exerted by temperature, organic matter, total solids, total dissolved solids, magnesium and chlorides. Euglenoid flagellates exhibited higher peaks in winter and found very low in summer. Diversified species of Euglena, Lipocinclis, Phacus and Trachelomonas were reported. Euglena acus, E. gracillis, E. oxyuris, Lipocinclis ovum and Trachelomonas volvocina represent high organic pollution of the lake and indicate high degree of organic pollution.
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