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AQUATIC ECOSYSTEM SERVICE: IMPROVING WATER QUALITY. MULTIFUNCTIONAL ROLE OF THE BIOTA IN WATER SELF-PURIFICATION IN MARINE AND FRESHWATER ECOSYSTEMS  [2017]

Sergei Ostroumov

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Abstract
New data on effects of chemicals (surfactants and some other pollutants) on water filtration by aquatic invertebrates are reported and reviewed. Some fundamental elements of the new theory of the multi-functional (polyfunctional) role of aquatic organisms (the biota) in self-purification of water in aquatic ecosystems (marine ecosystems, lakes, rivers, man-made reservoirs) are formulated. The theory covers the following: sources of energy for the mechanisms of self-purification; the main functional blocks of the mechanism of water self-purification; the system of the main processes that are involved; analysis of the degree of participation of the main groups of aquatic organisms; degree of reliability and the main mechanisms providing the reliability of water self-purification; biotic regulation of the processes; the attitude of the mechanism of self-purification towards the external influences/impacts; applications and conclusions relevant to the practice of sustainable use of water resources, including some new approaches in preventing eutrophication and chemical pollution. Vulnerability of the ecosystem’s mechanism for water purification was discovered using results of bioassays of ecotoxicants with aquatic invertebrates, namely, Mytilus edulis, Mytilus galloprovincialis, Crassostrea gigas, Unio tumidus, Brachionus calyciflorus, and Daphnia magna.
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Other subjects

  • rivers
  • water self-purification
  • marine ecosystems
  • water quality
  • Mytilus edulis
  • Crassostrea gigas.
  • lakes
  • pollution
  • aquatic
  • Mytilus galloprovincialis
  • environmental toxicology
  • ecosystem services

From the journal

THE CAUCASUS ECONOMIC AND SOCIAL ANALYSIS JOURNAL