New associations of floristic classification for psammophytic herb vegetation on fallows in the Southern Non-Chernozem Region of Russia

The article characterizes psammophytic herb communities on fallow lands, treated as two new associations Berteroo incanae–Hieracietum umbellati ass. nov. and Polytricho juniperini–Viscarietum vulgaris ass. nov. within the class of psammophytic herb vegetation Koelerio–Corynephoretea canescentis Klika in Klika et Novák 1941. Their communities represent secondary vegetation at different stages of regenerative succession on the site of oligotrophic pine forests. Based on floristic comparison, assessment of ecological regimes of community habitats and NMDS-ordination of coenofloras based on the H. Ellenberg’s optimal scales, the differences between the new syntaxa of the Southern Nechernozemye (Non-Chernozem region) of Russia from previously established European units are demonstrated.