Global warming has a significant impact on the biodiversity of living organisms. The rise of temperature affects the biotic and the abiotic factors in nature. Ciliates being minute in size are sensitive to climate changes. In view of this the seasonal fluctuation of population density of ciliates in relation to some selected physic-chemical parameters were studied. The interplay of abiotic factors and its role in fluctuation and distribution is discussed. The representatives of the three major classes i.e. Kinetofragminophora, Oligohymenophorea and Polyhymenophora were represented. The seasonal fluctuations are discussed and correlated.