P. DHASARATHAN, M.A. HANIFFA, K. GEETHA AND V. DHANUSHKODI
Abstract
Climatic changes influence the microbial population of Tamirabarni water when samples were studied. Bacterial population in river water collected during showed a low population during summer (50%) compared to other seasons. From the population, bacterial genera such as Bacillus (two fold), Pseudomonas (60%) and Flavobacterium (50%) were comparatively more in sample collected during summer. Gram-positive cocci (50%) microorganisms were reduced greatly in samples due to temperature influence. In rainy seasons, extra cellular enzyme activities of bacterial strains isolated from water sample showed predominance in amylolytic (100%), lipolytic (91.6%), caseinolytic (89.5%) and gelatinolytic (66.6%). During summer, the activation of isolated bacterial strains of amylolytic and caseinolytic were reduced 50% remarkably. In the present investigation, attempts were made to findout whether the changes in the microbial population in water sample due to climatic/temperature influence could be used as bacteriological indicators of aquatic/ thermal pollution?