REGIONAL FEATURES OF THE ALTITUDINAL GRADIENTS IN NORTHERN TRANSBAIKALIA VEGETATION COVER

Maxim V Bocharnikov,Luvsandorj Jargalsaikhan,Galina N Ogureeva

doi:10.24057/2071-9388-2018-11-4-67-84

Maxim V Bocharnikov, Luvsandorj Jargalsaikhan + Show 1 more

Open Access

https://doi.org/10.24057/2071-9388-2018-11-4-67-84

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Abstract

According to the the biome concept, the idea of the orobiome and its significance in the evaluation of the biodiversity for mountain territories are disclosed. Altitudinal gradients of vegetation with certain altitudinal limits of development are the basis for analysing the floristic and coenotic diversity of the orobiome and the ecological and geographical patterns of its spatial organization at the regional level. Based on the example from Kodar-Kalar orobiome, an altitudinal composition of the vegetation of the Northern Transbaikalia has been identified using thematic maps. The statistical evaluation of the altitudinal distribution of 4 vegetation belts (the upper tundra belt, the tundra belt, the sub-tundra belt and the mountain taiga belt) has been made. The regional features of the altitude position of the basic vegetation types forming the belts have been determined for the orobiome. They are reflected in three geographical variants. Orographic conditions and the history of the territory development have been discussed in the analysis of regional features of altitudinal spectra difference.

Highlights

According to the altitudinal gradient of bioclimatic conditions in the mountains, an altitudinal structure of vegetation cover forms
The revealed altitudinal structure of the vegetation cover of the Kodar-Kalar orobiome is the basis for the biodiversity evaluation
This is reflected in the formation of the 4 belts of vegetation: the upper tundra belt, the tundra belt, the subtundra belt and the mountain taiga belt

Summary

Introduction

According to the altitudinal gradient of bioclimatic conditions in the mountains, an altitudinal structure of vegetation cover forms It is associated with regular changes in species richness (Sang 2009; Wiesmair et al 2017), coenotic diversity (Hemp 2006; Molozhnikov 1986) and spatial structure (Nakashizuka et al 2016). These particularities have regional features that determine the separation of the altitudinal spectra of vegetation, which is reflected in the typology of altitudinal zonation, with the identification of its groups and classes (Ogureeva 1991).

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