Petrophyte pratum steppes of the «Oglakhty» site of the «Khakassky» State Nature Reserve

Abstract

As a result of the classification of the petrophytic-steppe vegetation of the Oglakhty section of the Khakassky Nature Reserve, two variants of the communities of the association Youngio tenuifoliae - Agropyretum cristati Makunina 2006 were identified, differing in the degree of moisture content of ecotopes. The Artemisia martjanovii variant includes typical meso-xerophytic communities of petrophytic steppes, and the Stellaria cherleriae variant includes more mesophytic petrophytic-steppe communities. The isolated units are placed in the union of petrophytic steppes Erichio pectinati-Selaginellion sanguinolentae Ermakov et al. 2006 , order Festucetalia lenesis Mirkin in Gogoleva et al. 1987, class of Central Asian steppes Cleistogenetea squarrosae Mirkin et al. ex Korotkov et al. 1991. The characteristics of the variants of the described associations are given and the regularities of their placement in the relief are given. The importance of the presented communities for preserving the diversity of the natural mountain-steppe vegetation of the Minusinsk intermountain basin and monitoring its conditions is noted.