No abstract

Water is a vital part of our lives. We drink it. We wash with it. We use water for irrigating crops, for transporting goods, as well as, for generating energy at hydroelectric dams and nuclear power plants. Lotic aquatic systems are those systems which contain flowing waters. The mass of water in these systems is in a state of perpetual motion. Streams and rivers are familiar examples of such systems.The basic function of these lotic bodies of water is to carry the surplus rain water back to the sea. In and around freshwater bodies many aquatic organisms are found which also complete their life cycle in it. In fresh water flora aquatic fauna abundantly present. Organisms that passively drift, maintained in suspension by water current or float or swim weakly, comprise the plankton. Plankton play role as herbivore,