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The comparative analysis of floristic composition of the Russian Plain center broad-leaved forests of the alliance Carpinion betuli Issler 1931 em. Meyer 1937 was carried out by means of detrended correspondence analysis (DCA) and direct ordination along ecological factor scales. The three associations representing the proper zonal units of the area, namely Querco-Tilietum cordatae Laivinš 1983 in the hemiboreal forest zone, Aceri campestris—Tilietum cordatae ass. nov. hoc loco in the broad-leaved forest zone, and Aceri campestris—Quercetum roboris Bulokhov et Solomeshch 1991 in the forest-steppe zone are characterized. Although all the forest stands described are small geographically isolated fragments, their floristic composition demonstrates the existence of syntaxonomic continuum and seems to be influenced by landscape features and anthropogenic disturbance just as strong as by zonal climatic factors. As a result of the undertaken analysis, the syntaxonomical revision of the Central-Russian broad-leaved forests of the alliance Carpinion betuli Issler 1931 em. Meyer 1937 is proposed. |
