Home – Home – Jornals – Flora and Vegetation of Asian Russia 2022 number 3

The main floristic differences of meadows of West Siberia plain, and of Altai-Sayan mountain region were revealed to be geomorphologically determined. The concept of syntaxa-“cores” uniting moderately disturbed meadows has been formulated. Their areas correspond to 5 geomorphological regions: the forest zone of West Siberian Plain, the northwestern foothills of Altai-Sayan mountain region, hyperhumid low mountains, hyperhumid middle mountains, and humid middle mountains. Dissimilarities of meadows in one region are caused by edaphic and anthropogenic factors, i.e. the recent fallow past, long-term overgrazing, relatively poor soils, periodically over wetted habitats, slightly salinized habitats. Taking into account the above ideas, the scheme of floristic classification has been corrected. The phytocoenotic diversity of studied area meadows is represented by 21 syntaxa belonging to 16 associations and 9 subassociations of 2 alliances from 2 orders of the Molinio-Arrhenatheretea class. Short descriptions of these syntaxa have been carried out. 15 syntaxa have been described for the first time or validated.