Diversity and Density of Macroinvertebrates in Vembakottai Water Reservoir, Virudhunagar District, Tamilnadu

Abstract

Water is a basic need of all living organisms on the earth. Most of the water on this planet is stored in oceans and ice caps, which is difficult to recover for our diverse needs. Most of our demand for water is fulfilled by rain water, which gets deposited in surface as ground water resources. More than 73% of the earth’s surface is covered by water to an average depth of 3,8m. In India, there are several large reservoirs exist besides large natural lakes and innumerable small tanks and ponds. Reservoirs are made by constructing dams across the rivers to serve a variety of purposes like industrial process, irrigation, navigation, domestic water supply, fish culture and recreation (Mankor., 2011).