Written Paper

Effects of forest fires in southern and central regions of Zabaykalsky area  [2016]

Buryak, L.V. Kukavskaya, Е.А., Russian Academy of Sciences. Siberian Branch, Krasnoyarsk (Russian Federation). The V.N. Sukachiev Inst. of Forest Science Кalenskaya, О.P. Malykh, O.F., Russian Academy of Sciences. Siberian Branch, Chita (Russian Federation). Institute of Natural Resorses, Ecology and Cryology et al.

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The fire frequency situation in Zabaykalsky region from 1964 to 2015 is evaluated and discussed in the paper. Decadal increase of fire numbers and their area is found. The main reasons of this are shown: climate aridization and increase of anthropogenic impact. The characteristics of the weather conditions in the years of high fire frequency are presented. Fire activity was found to increase not only because of the droughts in the last decades but also due to forest disturbances in Zabaykalsky region by illegal logging. Based on the data from 170 sample sites planted with the use of satellite images, forest inventory data and results of ground sample transects, the impact of the wildfires of different type, form and intensity on tree mortality in the light-coniferous forests was estimated, the amount of tree regeneration in the forest areas disturbed by fires, logged sites (both burned and unburned), and sites burned repeatedly was evaluated. Wildfires in Zabaykalsky region were found to be strong ecological factor influencing on the probability of existence of many forest ecosystems. In case of further climate warming and repeated fires, the part of the forests may transform to the non-forest areas. The steppification of the burned sites in the southern forest-steppe regions and in the low parts of the southern slopes at the border with steppe landscapes as well as desertification in the central parts of the territory and swamping of burned sites located
in the wet soils are observed. Wind and water soil erosion happens at the large burned sites.

From the journal

Siberian Journal of Forest Science

ISSN : 2311-1410