Abstract
The paper contains the vegetation study results of the valuable botanical object Chalk slopes to the Proval river.The stow is located in thevicinitiesof the villageBeketovka(Veshkaymsky District of Ulyanovsk Region) and is proposed for inclusion in the regional network ofprotected areas.The data of floral and phytocenotic studies are presented.The flora of the stow Chalk slopes to the Proval river contains 287 species of vascular plants including 8 species listed in Red data book of the Russian Federation:Hedysarumgmelinii,Irisaphylla,Koeleriasclerophylla,Matthiolafragrans,Pinus cretacea[P.sylvestrisvar.cretacea],Stipapennata,S.pulcherrima,Thymusdubjanskyi[Th. cimicinusauct. p. max. p.]. The regional rare and requiring protection plants areAdonanthe vernalis,Anemone sylvestris,Asperulaexasperata,Aster alpinus,Betula krylovii,Bupleurum falcatum,Carex pediformis,Centaurearuthenica,Crepispannonica,Delphinium cuneatum,Galatellalinosyris,Galiumhexanarium,Gentianacruciata,Gentianellaamarella,Helianthemumcanum,H.nummularium,Helictotrichondesertorum,Herminiummonorchis,Jurinealedebourii,Linumflavum,L.uralense,Onosmasimplisissimas.str.,O.volgensis,Otitesbaschkirorum,Parnassiapalustris,Polygalacretacea,P.sibirica,Pulsatillapatens,Scabiosaisetensis,Schoenus ferrugineus. Calcephitic florocoenotic complex of the stow Chalk slopes to the Proval river (Ulyanovsk Region) is characterized by a mosaic of vegetation. Here, in a relatively small area, meadow, petrophytic and grass-mixed steppes, forest edges communities are presented. The floristic composition of these communities is peculiar and characterized by the presence of a large number of rare species including relict and endemic elements. In addition, in the central part of the Volga Upland, only a small amount of erosion-chalk landscapes with a high degree of preservation is known. The studied stow is recommended for inclusion in the system of protected areas of the Ulyanovsk Region.
Highlights
Преобладают полукустарнички, кроме Helianthemum canum (7– 8%), также Scabiosa isetensis (6%), Thymus dubjanskyi (2%), Linum uralense (
Другое солнцецветовое [Helianthemum nummularium] сообщество также имеет очень низкое общее проективное покрытие (ОПП) (10%) и в нем также преобладают полукустарнички: Helianthemum nummularium (5%), Thymus dubjanskyi (3%) и Linum uralense (
Из полукустарничков участвуют Thymus dubjanskyi (5%), Linum uralense (2%), из злаков – Bromopsis riparia (3%), Stipa capillata (2%) и S. pennata (1%)
Summary
ОСОБЕННОСТИ ФЛОРЫ И РАСТИТЕЛЬНОСТИ УРОЧИЩА «МЕЛОВЫЕ СКЛОНЫ К РЕКЕ ПРОВАЛ» (УЛЬЯНОВСКАЯ ОБЛАСТЬ) Российская Федерация) Васюков Владимир Михайлович, кандидат биологических наук, научный сотрудник лаборатории проблем фиторазнообразия Институт экологии Волжского бассейна РАН – филиал Самарского федерального исследовательского центра РАН
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