Abstract
The material was collected during the open water period from March to the end of November 2019. In the period of our research in the basin of the Chirchik river (Boshkizylsay river, Ugam river (pre-settlement site), Chirchik river) were discovered several types of zoobenthos and periphyton. The monitoring was carried out on 8 stations, in total of 64 quantitative samples of macrozoobenthos and periphyton were taken. Anthropogenic pollution causes changes in the composition and structure of aquatic communities, expressed in the change of dominant complexes of organisms, the simplification of the ecological structure, the appearance of highly saprobic species in the composition of the dominants.
Highlights
Freshwater is a necessary resource for all life on the planet and habitat for living organisms
The obtained hydrobiological information indicates that anthropogenic factors, in particular pollution, cause different changes in depth in the composition, structure and ecological state of aquatic biocenoses
The most biocenoses vary below major sources of pollution and human settlements, in the sections of rivers flowing through agricultural zones, as well as in the estuaries
Summary
Freshwater is a necessary resource for all life on the planet and habitat for living organisms. Biological specialists suggest taking into account indicators of the disturbance of the state of individuals, populations and communities. It is not clear under what conditions (under what indicators of water quality) the recorded changes in biological systems occurred.
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