Diatoms Community Structure In Relation To

Abstract- Diatoms are likely to natural conditions in lake and their distribution is mainly governed by the physicochemical composition of the water. Monitoring of water quality with regards to physicochemical parameter is insufficient. Organic indicators of water quality monitoring urbanized during the recent years have served as excellent tools in the area of water pollution studies. Among all the algae, fresh water diatoms are the most commonly used indicators of the conditions of water. Several diatom indices are tested for rivers in other countries, but have not been used for lake water systems. Diatom monitoring studies in India have suffered given that their recognition is difficult and extensive reporting is not accessible mostly.. Diatoms and water samples were collected in 10 locations during summer season (May 2012). As a result the study aims at applying some of the diatom indices to monitor fresh water lakes of Yercaud city. Three water quality indices and sixteen water chemistry variables were analyzed. 21 diatom species are identified. They are as follows: Amphora ovalis, Bacillari