Assessment of the Urban Soil-Plant System Based on Integral Indicators of Environment Pollution

The distribution of integral indicators of the soil-plant system components contamination with polycyclic aromatic hydrocarbons in the urban area has been considered. An anthropogenically modified natural complex of the RUDN University campus and the adjacent South-Western Forest Park (Moscow) was the object of study. Soils (Albic Retisols (Ochric)) and common plant species were studied. Traffic load was the main pollution source. Emissions from five sections of roads, around and across the territory, formed a specific pattern of pollutants, which was demonstrated by the example of marker compounds, namely, polycyclic aromatic hydrocarbons. Background concentrations of individual polyarenes in the environment, determined by the method of dynamic phase portraits, have been calculated as an approximate safe level of contamination of soils and vegetation. A local redistribution of contamination zones was revealed owing to the migration of polyarenes from snow into soils, and then into root systems, and the above-ground parts of plants distribution. The proposed methodological approach, based on the use of integral indicators, allows us to assess the degree of damage to ecosystems caused by a complex of priority pollutants.