Abstract

STUDY OF SOME ENVIRONMENTAL FACTORS AND DIVERSITY OF PHYTOPLANKTONS IN GODAVARI RIVER AT PRAVARA SANGAM (M.S.) INDIA.

K. B. Ningule* and I. R. Ustad

ABSTRACT

The present investigation deals with study of some environmental factors from Godavari River at Pravara Sangam. Variations in atmospheric temperature ranged from 24.8 to 340C and Water temperature ranged from 22.6 to 29.90C. Seasonal analysis showed that it was highest (29.90C) in summer and relatively lowers in winter (22.60C). Change in water temperature was directly proportional to the change in the atmospheric temperature. pH values varied from 7.2 to 8.5 are suitable for aquatic organisms. Dissolved oxygen values ranged from 6.4 to 8.8 mg/l. Maximum dissolved oxygen noted in winter season, minimum in summer months. Chloride values ranged from 17.8 to 25.0 mg/l., Total alkalinity values ranged from 105 to 142 mg/l. Total hardness ranged from 86 to 120mg/l, Biochemical oxygen demand values ranged from 2.30 to 5.90 mg/l. Minimum biochemical oxygen demand 2.30mg/l was recorded in May and maximum 7.2mg/l was recorded in July and Chemical oxygen demand values ranged from 5.40 to 8.40mg/l. Minimum 5.40 mg/l. COD was recorded in February while maximum 8.40 COD was recorded in April. January to December 2013.Total dissolved solids ranged from 250 to 538 mg/lit. were recorded, minimum 250mg/lit. recorded in the month of December and maximum 538 mg/lit. was recorded in the month of July. Water samples were collected from selected three sites (S1, S2 and S3). The Phytoplankton samplings on monthly basis were carried out for a period of one year from 2012 to 2013 from Godavari River water. Standard keys and other literature were used for identification of different species. In the present investigation an account of occurrence of phytoplankton, their nature, number and seasonal periodicity have been studied to assess the state of the nature of water. The present study was undertaken to observe the seasonal changes in plankton population. The data on plankton in reservoir was collected seasonally during 2012. In plankton flora, the green algae dominated over the other groups. The phytoplankton’s identified are members of Chlorophyceae, Bacillariophyceae, Cyanophyceae, Euglenophyceae, Dinophyceae, filamentous algae, Oedogonium species, Cladophora glomerata, and Spirogyra.

Keywords: Environmental factors, Godavari river, Phytoplanktons, Pravara sangam.