UDC 581.93:574.4

Ogureeva G.N., Bocharnikov M.V. ECOSYSTEM AND BIOTIC DIVERSITY OF THE SOUTH-EAST ALTAI–TUVA DESERT-STEPPE OROBIOME // Arid Ecosystems. 2022. Vol. 28. № 4 (93). P. 75-82. | PDF

Based on the biome concept of ecosystem diversity and the ecological-geographical approach to the analysis of biodiversity, a regional assessment of the unique South-East Altai-Tuva orobiome for Russia is given. Orobiome is considered as a strong unit for inventory and analysis of ecosystem and biotic diversity of mountain territories. The characteristic of bioclimatic indicators characterizing the originality of the desert-steppe orobiome of the Subarid class of belt types and its high-altitude belts is given. The altitudinal-belt structure of the vegetation cover is revealed, according to which the spatial differentiation of flora, plant communities, and ecosystems are formed. A quantitative assessment of the floristic (about 1400 species of vascular plants) and phytocenotic diversity by belts (nival, wasteland-tundra, forest-steppe, steppebelts) is iven. The features of the spatial structure of the diversity of communities in the conditions of the mountainous territory are revealed.

Keywords: biodiversity, mountain biome, ecosystem, biota, altitude-belt spectrum.

Funding. The work was carried out within the framework of the state task on the topic «Spatio-temporal organization of ecosystems in the conditions of environmental changes» of Moscow State University and on the basis of the MWG Herbarium (created with the support of the Moscow University Development Program).

DOI: 10.24412/1993-3916-2022-4-75-82

EDN: ERCHHN