Abstract
Abstract
As a result of the environmental impact, natural landscapes are substantially transformed into derivative anthropogenic systems. An example of this process is the anthropogenic extrazonal alkali soils (Tobolsk district, Tyumen region, Russia) at the places where salt water exits from wells drilled during geological exploration works. The vegetation of such alkali soils was studied in two areas of the Tobolsk district: near the villages of Kachipovo and Bekerevka. The species composition of such communities depends on the location relative to the well, and the time of exposure to ground and flood waters. The maturity of the associations of alkali soils is characterized by the halophyte saturation and by the peculiarity of the age composition of their populations. As the impact of salt water decreases, indigenous zonal vegetation is restored at the site of alkali soils. Artificial salinization of the soil near the wells contributed to the accumulation of halophytes of both relict and anthropogenic origin. To compare vegetation on alkaline soils of anthropogenic origin, a site with natural vegetation was studied as a control.