Volga Upland

HABITAT AND ADAPTATION CHARACTERIZATION OF HEDYSARUM GRANDIFLORUM PALL. (FABÁCEAE, DICOTYLÉDONES) IN THE SOUTHERN VOLGA UPLAND

Authors: Lavrentiev M. V., Boldyrev V. A.

The coenopopulations of Hedysarum grandiflorum Pall. in the southern Volga Upland within the administrative boundaries of the Saratov region were studied for the first time. The relief, parent rocks and soils in their habitats were characterized. Main environmental scales were supplemented by new data. Tolerance amplitudes by vital environmental factors were revealed. Adaptation features of this species to its environment are presented. H. grandiflorum is shown to be a quite stenobiontic species.

CHARACTERISTICS AND MAIN DIRECTIONS OF ANTHROPOGENIC FLOROGENESIS IN THE SOUTHERN VOLGA UPLANDS

Authors: Berezutsky M. A.

The whole range of aspects of anthropogenic florogenesis in the southern part of the Volga Uplands is considered. Trends in the anthropogenic dynamics of local floras during the last 100 years are reported. A 50 - 100 km shift north of the southern boundary of the habitat of some boreal species (Antennaria dioica (L.) Gaertn, Maianthemum bifolium (L.) F. W. Schmidt, Pyrola rotundifolia L. etc.) is noted. Data on the adventive flora and contemporary migration paths of the plants in the area under study are provided.