Hydrobiological investigation at Ennore backwater: emphasize to seasonal consequence

Abstract

Hydrobiology regulates the plankton diversity in a water body and is a fundamental research area in aquatic and ecological studies. The present study was carried out to assess the physicochemical parameters viz. temperature, salinity, pH, at four stations in Ennore estuary for the period of one year from January to December 2021. Atmospheric Temperature of the Ennore backwaters varied from 26 to 36°C and the mean temperature of 31.20°C. Surface water temperature in the present study was varied from 25°C to 34°C and the mean temperature of 29.45°C. Salinity was varied from 22.35 to 54.65 ppt and the mean salinity of 37.44 ppt. pH at Ennore back waters ranged from 7.5 to 8.5 with the mean pH of 8.08. Dissolved oxygen content was ranged from 0.59 to 8.2 mg/l and the mean dissolved oxygen content of 4.85 mg/l. Salinity is the predominant parameter altered in wide range. The basic reason for the salinity alteration is the continual ventilation hot water from thermal power stations with temperature raise.