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Mangrove sediments, due to their unique environment, are considered to be a crucial habitat in identifyingyeast strains with potent industrial, biotechnological and bioremediation properties. The present studyinvestigates the distribution and hydrolytic enzyme potential of yeast isolates from North Kerala withrespect to changes in seasonal and sediment characteristics. Sediment samples were collected from 8locations spreading in 5 districts along the northern coast of Kerala during monsoon and post monsoonseasons of a year. The pH of the sediments varied between 6.4 to 7.0, temperature between 21?C – 29?Cand organic matter content between 1.7% + SD – 4.2% + SD. The number of Colony Forming Unitsper milliliter of the sample (CFU/ml) of the cultivable yeasts varied drastically between the seasons. Atotal of 233 isolates were studied during the specified period of study, out of which 82% of the isolatesshowed various hydrolytic enzyme activities during monsoon while 89% in post monsoon. Lipase andLigninase activity was shown by maximum number of isolates. It was found from this study that asthe moisture content and organic matter of the sediment decreased, the CFU/ml of cultivable yeastsdecreased considerably while the number of potent isolates with hydrolytic enzyme activity increased.The extracellular enzymes produced by yeasts possess variety of applications in industrial processes andare also very important in the environment due to their capacity of biodegradation. Hence, the presentwork attempts to understand the ecological and seasonal influence on the distribution and the bioactivity ofcultivable yeast strains from a unique yet least studied environment like mangroves.Keywords: Bioactivity, Conservation, Industrial Processes, Mangroves, Organic matter, Yeast.

A study on the distribution and hydrolytic enzyme potential of yeasts in the mangrove sediments of Northern Kerala