Distribution of organic compounds in the system of geochemically linked mires (the Spurs of Vasuygan Mire)

Abstract

Specific natural and geochemical conditions formed on Vasuygan Mire include a wide variety of vegetation, types of peat deposits, and peats composing them. The study of the Vasyugan Mire’s biospheric functions and elaboration of the scientific bases of regional monitoring are important. Therefore, we investigated mire regimes under field conditions. The examined plot, which includes the biogeocenoses connected geochemically with the landscapes, is the model system for the Vasuygan Mire. According to our data, the age of this plot dates back to 2500–4800 years. Our work revealed peculiarities of biochemical processes that exert influence on the formation of hydrochemical runoff from the paludified territory in the peat deposits of the landscape profile. The chemical composition of mire water and the subsequently migrating stream are formed due to the mixture of atmospheric precipitation with swampy waters. The composition of swampy water is defined by the arrival of movable compounds from the peat deposit, which underwent a regular biochemical transformation. The total runoff of chemical elements during the course of the runoff were as follows: Ca2+—1398, Fetotal—311, SO42−—391, NO3−—236, NO2−—1, Pb—2.253 × 10−3, Mn—317.29 × 10−3, Zn—41.191 × 10−3, Ni—8.151 × 10−3, and Ti—29.651 × 10−3 kg/km2. The annual runoff losses of dissolved organic matter were equal to 6945 kg/km2. Our study of the concrete water objects and physical, chemical, and biological processes of the transformation of substance and energy flows on the catchment areas provide insight into the chemical constituents of georunoff.