Comparative assessment of physico-chemical and biological parameters of ponds in Saharsa District, Bihar

A study of fresh water ponds at two different sites were made to compare the physico-chemical and biological properties. The seasonal variation in temperature, pH, dissolved oxygen, phosphate and nitrate content and alkalinity of the ponds located in populous city area and village area were compared and analysed. The results showed both the ponds differ in chemical, biochemical and biological content in three seasons including winter, summer and monsoon of the year. Total 19 species of Cyanophyceae were recorded in city pond whereas only 13 species in village pond. The variations in the physico-chemical properties of the ponds may be the reasons of variation in the Cyanophycean species.