Published on 30 July 2019
The inventory and analysis of high-altitude flora is a necessary condition for assessing the state of fitbit, determining trends in its changes and the impact on the integrity of the habitant, as well as for the correct understanding of flour -genesis, forecasting in many theoretical and practical areas, determining the prospects for the use of resource-useful species and the preservation of phyto-diversity. The article highlights the results of long-term (2010– 2017) studies of Alpine rock scree flora of the Central and Eastern Caucasus. The data on endemic species are given. In the present flora among 384 species 107 (27.9 percent) are endemic species; 33 (8,6%) species strictly endemic species (22 steno endemic and 11 euro endeliks), 74 (19.3 per cent) of sub endemic ones. Kinship relations of different species, as well as their origin are established. An analysis of endemism species show that there are different types of endemic species, noted their importance for the solution of close genetic issues. The analysis of flora endemism of the Central and Eastern Caucasus showed that the studied flora has rather high degree of originality, almost every tenth of its species is endemic for this territory. The leading families of the systematic spectrum play an outstanding role in the formation of the endemic component of the flora, they account for about a quarter of endemics of all categories, the dominant role belongs to three families Campanulaceae-Caryophyllaceae-Fabaceae. Data on the genetic and geographical relationships of 22 steno endemic and 11 angelics are provided. The formation of the endemic core of flora should be geographically associated with the Elbrus mountain range and mountain ranges of the right bank of the Samura, in total, the largest number of endemics of all categories is concentrated in the floristic regions of the East Caucasus. The vast majority of endemic species are neo endemics which were formed on the Caucasian genetic basis, the fourth part of the species are polio endemics showing the Armenian-Iranian-Turanian ties, weak ties can be traced with the Central Asian territories.
Tags: флора, реликты, скалы и осыпи, Центральный и Восточный Кавказ.
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)