Screening of Key Biogeochemical Indicators of the Environment of Large Industrial Agglomerations (on the Example of the Moskovsky District of St. Petersburg)

The ecological and biogeochemical indicators of the state of the environment on the territory of a large urban agglomeration on the example of the Moskovsky district of St. Petersburg are considers. In 2009–2015–2021, the pH, chemical composition of soils and bark of Populus balsamifera were studied, biotesting of soils using Daphnia magna and Chlorella vulgaris was carried out. An integral indicator of LTP (Landscape Total Pollution) pollution based on the Harrington desirability function was used. An analysis of changes in the state of the environment over the specified period, depending on the functional use of the territory, was given. The aggravation of long-term pollution of environmental components in conditions of increasing emissions from motor vehicles, which is induced by increasing concentrations of Pb, Cd, Zn, Cu, Ni, Fe, Mn in soils and plants, is noted.