Spatial Distribution of Organic Carbon in Soils of Eastern European Tundra and Forest-Tundra Depending on Climate and Topography
https://doi.org/10.1134/S2587556618060146
Abstract
Evaluation of soil organic carbon (SOC) storage in 11800 km2 area of tundra and forest-tundra in Usa River basin was carried out using multiple regression with account of soil taxa and influence of climate and topography. The model explained 84% of spatial variability in SOC storage. Negative relations were found between SOC and climatic norms of June precipitation, as well as elevation; causes of these relations are discussed. Based on the model, a gridded map of SOC storages was calculated at resolution 300 m. In addition, a grid of SOC storages was calculated using spatially uniform “reference” values that are averages by observation points for soil taxa. An average of SOC storages by the model is 21.6 kgC/m2 , while it is 32.0 kgC/m2 when the “reference” values were used. Corrected “reference” values calculated from the model were suggested that are 1.5 times lower than those obtained from observation points. It was shown that average deviations of SOC storages from corrected “reference” values, which reflect influence of climate and topography, are 5.85 kgC/m2 . When climate and topography are taken into account in addition to soil taxa, this provides more correct evaluation of SOC than frequently used “reference” values for soil taxa. It is shown that the distinctions are not small.
About the Authors
P. A. Shary
Institute of Physicochemical and Biological Problems of Soil Science, Russian Academy of Sciences
Russian Federation
Russian Federation
L. S. Sharaya
Institute of Volga Basin Ecology, Russian Academy of Sciences
Russian Federation
Russian Federation
A. V. Pastukhov
Institute of Biology, Komi Science Center, Ural Branch, Russian Academy of Sciences
Russian Federation
Russian Federation
D. A. Kaverin
Institute of Biology, Komi Science Center, Ural Branch, Russian Academy of Sciences
Russian Federation
Russian Federation
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Review
For citations:
Shary P.A., Sharaya L.S., Pastukhov A.V., Kaverin D.A. Spatial Distribution of Organic Carbon in Soils of Eastern European Tundra and Forest-Tundra Depending on Climate and Topography. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2018;(6):39-48. (In Russ.) https://doi.org/10.1134/S2587556618060146
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