Abstract
When wastewater enters water bodies, it changes both physical properties and chemical composition of water. Qualitative and quantitative composition of aquatic organisms and the biological structure of phytocenopopulations change as well. A special form of pollution is eutrophication of water bodies. The ability of photosynthetic organisms to accumulate and use substances, primarily phosphorus and nitrogen, makes them actively involved in self-purification of natural waters. The anthropogenic impact on aquatic ecosystems is increasing, therefore, monitoring and global environmental protection systems are of great relevance. The paper deals with a range of issues: the impact of gas station discharges on chemical composition of water is studied and assessed; the concentration of pollutants in water is analyzed before and after a backwater inhabited with higher aquatic plants; the effect of hydrophytes on processes of self-purification of the water body is considered. Solution of the issues made it possible to assess the impact of higher plants on chemical composition of water and self-purification processes, and biota. The impact of higher plants on concentration of pollutants in the water body was analyzed. The study revealed that higher plants reduce an adverse effect of pollutants on the biotic potential of the river ecosystem.
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