Ecological Systems and Devices Annotation << Back Еcological-hydrobiological system of water self-purification in natural aquatic ecosystems: developing the theory of the polyfunctional cental role of biota Ostroumov S.A. A short review of the main physical, chemical and biological processes that contribute to water self-purification in natural aquatic bodies and streams is presented. The polyfunctional central role of aquatic organisms in the system of processes of water self-purification is demonstrated.