New pictures, photos were added. https://www.researchgate.net/publication/216166764; The Concept of Aquatic Biota as a Labile and Vulnerable Component of the Water Self-Purification System. - Doklady Biological Sciences, Vol. 372, 2000, pp. 286–289. Full text online free: http://www.scribd.com/doc/49069991; the paper discovered the role aquatic organisms as a part of the mechanism of ecosystem service to improve water quality;

New pictures, photos were added.

The Concept of Aquatic Biota as a Labile and Vulnerable Component of the Water Self-Purification System. - Doklady Biological Sciences, Vol. 372, 2000, pp. 286–289. Full text online free: 
https://www.researchgate.net/publication/216166764;
the paper discovered the role aquatic organisms as a part of the mechanism of ecosystem service to improve water quality;
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