Application of data on thermic conditions of soils for differentiation of vegetation in exposure-related forest-steppe of Transbaikalia
O. A. Anenkhonov1, D. V. Sandanov1, H. Liu2, A. Yu. Korolyuk3, C. Xu2, W. Guo2,4, A. A. Zverev3,5, B. B. Naidanov1, D. G. Chimitov1
1Institute of General and Experimental Biology of SB RAS, Ulan-Ude, Russia
2Peking University, College of Urban and Environmental Science, Pekin, China
3Central Siberian Botanical Garden, Novosibirsk, Russia
4University of California, Merced, USA
5Tomsk State University, Tomsk, Russia
Keywords: экология растительных сообществ, температура почв, увлажненность местообитаний, экологические шкалы, экспозиция склонов, лесостепь, Забайкалье, ecology of plant communities, soil temperature, habitat humidity, plant indicator values, slope aspect, forest-steppe, Transbaikalia
Abstract
Results of long-term monitoring (from 2008 till 2018) of thermic conditions have been applied to assessments of eco- and topological differentiation of vegetation in exposure-related forest-steppe of Transbaikalia. As a result significant differences were revealed between thermic conditions at northern and southern slopes as well as between different kinds of forest-steppe along the aridity and continentality gradients. The temperature conditions at the southern slopes are relatively unified and this is a basis for the vegetation of the only steppe class of Cleistogenetea squarrosae occurred there. Despite, the temperature conditions at the northern slopes are more heterogeneous that result in plant communities of different classes are developed, namely steppe of Cleistogenetea squarrosae , and forests including the hemiboreal class Rhytidio-Laricetea and boreal class Vaccinio-Piceetea . Additional contribution to soil temperature differences is inputted by the size of forest patches in forest-steppe.
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