Ключевое слово: «environmental assessment»

This article presents the results of studies of fluctuating asymmetry and chemical composition of poplar leaves Populus nigra L. in Sibai. The city is a major industrial center for the extraction and processing of copper-pyrite ores in the Trans-Urals of the Republic of Bashkortostan. Bioindication methods are used to assess the ecological state of the studied territory. In the course of the conducted studies, it was found that the average value of the fluctuating asymmetry characterizes the strong, extreme pollution of the Sibai environment. The content of chemical elements in poplar leaves exceeds regulation on maximum permissible limits by several times, with the exception of nickel and cadmium. According to V.V. Dobrovolsky, the concentrations of heavy metals are many times higher than in Clark plants. The ecological state of the city is characterized as an ecological catastrophe and an ecological crisis. The data obtained can be used in conducting comprehensive monitoring studies of urbanized territories.

This article presents the results of studies of the chemical composition of soils in the impact zone of a mining enterprise in the vicinity of Sibay (Republic of Bashkortostan) for the period from 2019 to 2023. Analysis of the dynamics of the soil chemical composition showed the presence of significant excess levels of heavy metals such as Cu, Zn, Ni, Pb and Cd. The data obtained indicate the need to develop measures to restore disturbed lands and conduct ongoing monitoring studies to assess the ecological state of the natural environment.