Vitality structure of cenopopulations of Alyssum turkestanicum var. desertorum (Brassicaceae) in the ecotone system of the coastal zone of the Chogray reservoir

¹ Federal State Budgetary Educational Institution of Higher Education “Kalmyk State University named after. B.B. Gorodovikov”, Elista, Russian Federation
² BNU RK “Institute for Complex Research of Arid Territories”, Elista, Russian Federation

^* Corresponding author: for-lidjieva@yandex.ru

Abstract

The article presents the results of a study of the vitality structure of plant cenopopulations using the example of Alyssum turkestanicum var. desertorum (Brassicaceae) in the ecotone system of the coastal zone of the Chogray Reservoir located in the Kuma-Manych Depression, in the valley of the East Manych River in the vegetation periods of 2021-2022. In accordance with the concept of A.S. Zaletaev, successive blocks of the “water-land” ecotone system are distinguished on the coast of the reservoir. In the cenopopulations of A. turkestanicum var. desertorum from 5 communities located at different distances from the reservoir, an analysis of the frequency of occurrence of plants of three vitality classes was carried out and their vitality spectra were constructed. An assessment of the vitality of cenopopulations using the IVC vitality index allowed us to conclude that the populations of A. turkestanicum var. desertorum, growing in various plant communities of the ecotone system, mainly belonged to the vitality type “flourishing”. During the study, it was found that the viability of populations of the species A. turkestanicum var. desertorum in various belts of the ecotone system of the coastal zone of the Chogray reservoir depends not only on the ecological and phytocenotic conditions of their growth, which change with distance from the reservoir, but also on the climatic conditions of a particular year.