Seasonal Dynamics of Phosphate Content in the Perennial Lentic Water Body of Chapra , Bihar

In lentic environment, phosphate exhibited a marked seasonal variation in its concentration. At site 1, the lowest value was recorded in January, 2012 (0.019 mg/L) and February, 2013 (0.027 mg/L) while the highest in May, 2012, (0.245 mg/L) and April, (0.197 mg/L) during the first and second year respectively. Whereas, at site 2, the minimum and maximum phosphate concentration was observed in September, 2012 (0.418 mg/L) and April, 2012 (0.831 mg/L) during first annual cycle. While, in the second year it was in August, 2013 (0.493mg/L) and May, 2013 (0.823mg/L).