Abstract
The characteristics of the forest-steppe of Middle Siberia, and its distinctive features in comparison with the forest-steppe within the plains of the European territory of Russia and Western Siberia are discussed and the main features of the vegetation of islands of forest-steppe within the northern and southern subzones are given. We made a spatial and temporal analysis of the present state of the soils of forest-steppe geosystems within the Nazarovskaya Depression in the context of climate change and found regularities in its variability, and determined changes in the differentiation of the organic matter. The dynamics in soil moisture deposition vary according to long-term precipitation cycles. Our experimental data prove that the humus state of the soils changes both in space and time. An increase of the mean annual air temperature over the past two decades under a sufficient amount of precipitation caused the greatest changes in the humus state of dark-grey wood soil and weakly-leached chernozem on slopes with forest-steppe. During the more than 20 years of observation the contents of total carbon, humic acids and insoluble residue have increased up to threefold. These signs give evidence of a tendency in the present development of the southern Siberian island forest-steppe towards the formation of islands of natural steppe, which can be considered a landscape response to global and regional changes in the natural environment.
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Vorobyeva, I.B. (2012). Changes in the Southern Siberian Forest-Steppes. In: Werger, M., van Staalduinen, M. (eds) Eurasian Steppes. Ecological Problems and Livelihoods in a Changing World. Plant and Vegetation, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-3886-7_16
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DOI: https://doi.org/10.1007/978-94-007-3886-7_16
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