LIMNOLOGY OF NETHRAVATHI RIVER AT THUMBE AND SARPADI VENTED DAMS OF DAKSHINA KAINNADA
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Date
2008
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Karnataka Veterinary Animal And Fisheries Sciences University, Bidar
Abstract
Aquatic ecosystem is the most diverse ecosystem in the world. The life originated in the water and first organisms were also aquatic where water was the principal external as well as an internal medium of organisms. Thus water is the most vital raw material for the existence of all living organisms. Water covers about 71% of the earth of which more than 95% exists in gigantic oceans. A very less amount of water is contained in the rivers (0.00015%) and lakes (0.01%), which comprise the most valuable fresh water resources. Global aquatic ecosystems fall under two broad classes defined by salinity viz-freshwater ecosystem and the saltwater ecosystem. Freshwater ecosystems are inland waters that have low concentrations of salts (< 500 mg/1). The salt-water ecosystem has high concentration of salt content.