Spatial heterogeneity of soil acidity properties in peatlands of Western Siberia ...

• Main Authors: Raudina, Tatiana V., Istigechev, Georgyi I., Loiko, Sergey V.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Zenodo 2023
• Subjects: Soil acidity, zonal patterns, Histosols, soil waters, frozen mound and polygonal bogs, Western Siberia Lowland; taiga; Tundra; Siberia
• Online Access: https://dx.doi.org/10.5281/zenodo.7878897; https://zenodo.org/record/7878897

The formation of significant amounts of low molecular weight (LMW) water-soluble organic compounds, which are highly reactive compounds of a non-specific nature, is a feature of the biogeocenoses of the North. Soil acidity, which in turn depends on LMW organic acids content, regulates the migration ability of compounds in landscapes and the bioavailability of nutrients. With an increase in the active layer thickness of peat soils in Western Siberia in the course of climate warming, new portions of LMW water-soluble organic compounds will enter, which will be quickly processed by microorganisms into CH 4 and CO 2 . Five key sites were considered, located within thawed oligotrophic, frozen mound and polygonal bogs. The analysis of zonal patterns of acidity changes in the waters of peat soils indicates an increase in the pH in the series: northern taiga<forest tundra<southern tundra. A feature of the most acidic soils of the northern taiga is the high content of low molecular weight organic acids, the ... : This work was supported by the Russian Science Foundation (project number 21-77-00021). ...