FOREST FIRES IN YAKUTIA AND THEIR IMPACT ON SOIL COVER IN TERMS OF PREDICTED CLIMATE CHANGE
https://doi.org/10.25587/SVFU.2019.13.27557
Abstract
Considering the significant impact of wildfires on properties, content and regime of automorphic soils of the permafrost area, we have suggested the term ‘Pyrogenesis’, which describes processes and events that occur in natural landscapes under the influence of fire. In the forest phytocenoses of South Yakutia also characterized by the increased amount of forest fuels (14.92-42.20 tons/ha). Mosses, lichens and litter that belong to the 1st group of fire conductors make up 37-62 % of the total phytomass. Frequent summer thunderstorms are common in the studied area. Thus, the average number of wildfires caused by lightning during summer period makes up 49 % of the total number of wildfires. Basing on the study of the patterns on geographical distribution, development of properties and composition of pyrogenically transformed cryogenic soils with a polycyclic profile in Yakutia their geographic-genetic traits were found. It was demonstrated that pyrogenic buried humus horizons were characterized by the increased content of humus and nitrogen, as well as clay fractions, silt and Са+2 and Mg+2 exchangeable bases. In the humus composition of these buried horizons, one can clearly observe the increase in calcium-bound humic acids (HA-2). The type of humus in such horizons change from fulvatic to fulavtehumatic and humatic. In the frozen taiga region of Yakutia, especially in humid mountain regions, wildfires have negative effect on soil cover.
About the Author
A. P. Chevychelov
Institute of Biological Problems of Cryolithozone, Yakut Scientific Center, SB RAS
Russian Federation
Russian Federation
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Review
For citations:
Chevychelov A.P. FOREST FIRES IN YAKUTIA AND THEIR IMPACT ON SOIL COVER IN TERMS OF PREDICTED CLIMATE CHANGE. Vestnik of North-Eastern Federal University Series "Earth Sciences". 2019;(1):55-67. (In Russ.) https://doi.org/10.25587/SVFU.2019.13.27557
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