Bioclimatic factors and ecological and geographic regularities of distribution of rare species Hedysarum grandiflorum Pall
L. M. ABRAMOVA1, S. N. ZHIGUNOVA2, V. N. ILYINA3, M. V. LAVRENTIEV4,5, N. A. SUPRUN6,7
1South Ural Botanical Garden-Institute of UFRC RAS, Ufa, Russia
2Ufa Institute of Biology of UFRC RAS, Ufa, Russia
3Samara State University of Social Sciences and Education, Samara, Russia
4Saratov State University, Saratov, Russia
5National Park “Khvalynsky”, Khvalynsk, Russia
6Volgograd Regional Botanical Garden, Volgograd, Russia
7Volgograd State Socio-Pedagogical University, Volgograd, Russia
Keywords: Hedysarum grandiflorum Pall, rare species, range, ecological niche, distribution limits, protection
Abstract
Distribution and range of ecological factors of the rare species Hedysarum grandiflorum Pall. in the European part of Russia are discussed. Data on 387 species localities from 10 regions of the Russian Federation were used. Climate and soil indicators were calculated using raster data of 19 bioclimatic variables of BIOCLIM, the SoilGrids global digital soil mapping system and the SRTM 1arc_V3 digital elevation model. Indicators of the average annual temperature, temperature of the summer and winter months of H. grandiflorum habitats decrease in the northeast direction from the Rostov region to the Republic of Bashkortostan, and the annual precipitation is less in the southern regions of the steppe zone and more in the regions of the forest-steppe zone, while there is a higher amount of summer precipitation than winter. Boundary localities of the species range in most cases have extreme (maximum or minimum) values of climatic factors. In the northeast of the range of H. grandiflorum, the progress of the species is limited by low temperatures in the summer and winter months, from the south, the progress of the species is limited by high summer temperatures and low precipitation in the summer. Species protection is carried out in 19 reserves, wildlife areas, natural and national parks, as well as in more than 80 natural monuments, and is generally sufficient, but regional small localities of the species require special attention.
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