Biochemical activity of the peat soil of a river marsh ecosystem

The chemical composition and enzymatic activity of peat soils in a river marsh ecosystem are considered. The biochemical processes were found to be most active in peat soils in an area near the river channel and in the central part of the floodplain, which were formed under rich mineral nutrition and aerobic conditions. This is explained by soil functioning conditions.     

The structure of the micromycete complexes of oligotrophic peat deposits in the southern taiga subzone of West Siberia

The analysis of the micromycete complexes of oligotrophic peat deposits in the Vasyugan Marsh by direct count and culture methods showed that the micromycete carbon comprises no more than 3% of the total peat carbon and that the microscopic fungal biomass varies from 2 to 13 tons/hectare, depending on the season and the peat deposit thickness. Fungal spores were found in all layers of the peat deposits, whereas the mycelium was found only in the active peat layer. The high abundance of eukaryotic cells in the peats was due to the presence of yeastlike cells rather than fungal spores. Analyses by culture methods showed that micromycetes were present in all peat layers and that their abundance tended to decrease with depth, except for yeasts, which were uniformly distributed in a vertical direction. The micromycete complexes of the peat deposits were similar in the diversity and abundance of dominant species but differed in the composition of minor species. Peat yeasts were dominated by ascomycetes.     

The Structure of the Micromycete Complexes of Oligotrophic Peat Deposits in the Southern Taiga Subzone of West Siberia

The analysis of the micromycete complexes of oligotrophic peat deposits in the Vasyugan Marsh by direct count and culture methods showed that micromycete carbon comprises no more than 3% of the total peat carbon and that the microscopic fungal biomass varies from 2 to 13 tons/hectare, depending on the season and the peat deposit thickness. Fungal spores were found in all layers of the peat deposits, whereas the mycelium was found only in the active peat layer. The high abundance of eukaryotic cells in the peats was due to the presence of yeastlike cells rather than fungal spores. Analyses by culture methods showed that micromycetes were present in all peat layers and that their abundance tended to decrease with depth, except for yeasts, which were uniformly distributed in a vertical direction. The micromycete complexes of the peat deposits were similar in their diversity and abundance of dominant species but differed in the composition of minor species. Peat yeasts were dominated by ascomycetes.     

Paludification on Vasyugan Mire

Results of long-term estimates of carbon stock and current carbon sequestration in pine–shrub–sphagnum BGC in Vasyugan Mire (VM) are discussed. In different climatic conditions (different years), NРP varies from 206 to 337 g Cm^–2 year^–1. An increase in carbon-emission intensity was detected in drier vegetation periods. Most of the carbon losses are the emission of carbon dioxide (average is 61.3 g Cm^–2 years^–1, or 23.5% NPP). It is possible to ascertain the progression of peat formation. The removal of the carbon by bog waters was calculated using a mathematical model. It was estimated as 3.0% NРР with a mean value of the removal of 7.9 g Cm^–2 years^–1. Based on the model of bogs vertical growth, the modern rate of carbon accumulation was estimated in the range from 10.3 g Cm^–2 years^–1 in polygonal bogs to 51.7 g Cm^–2 years^–1 in grassy bogs.