Home – Home – Jornals – Flora and Vegetation of Asian Russia 2012 number 2

Classifi cation of watershed meadow communities of Arrhenatheretalia order occurring on Tobol-Irtish and Ob- Irtish watersheds (subtaiga subzone) was made according to the Braun-Blanquet approach. 3 associations and 4 subassociations of alliance Festucion pratensis were described. In this area meadow communities on abandoned arable lands predominate. Meadow communities on zonal soils belong to the association Cirsio setosi-Phleetum pratensis. It is represented with 3 subassociations. In the western part of studied area (Tobol-Irtish watershed) on sandy weakly-acidic soils meadow communities of Loto corniculati-Agrostietum tenuis dianthetosum deltoidis subassociation with Agrostis tenuis as dominate are common. Th e meadows of Aegopodio podagrariae-Phleetum pratensis association occur in the eastern part of studied area (Vasyugan plane of Ob-Irtish watershed). Th ey are situated in small depressions and at forest edges. Under anthropogenic pressure (haying) they replace forest meadow (Geranio bifolii-Brachypodietum pinnati) association.