Zoobenthos as an indicator of water-bodies’ ecological condition
The biological, not the hydrochemical, analysis, is considered to be most true and is of a decisive importance for assessment of a water-body’s ecological condition and for water quality control. Zoobenthos is an appropriate character of water-bodies’ ecological condition. The biological control methods of river waters refer to qualitative composition, abundance and biomass of zoobenthos, presence/absence of indicative species.