Bryological and Lichenological Section/ABLS
Shustov, Mikhail V. .
Lichens of the Privolzhskaya upland.
THE 27-year detailed investigation of the Privolzhskaya upland lichens flora allows to give its general characteristics. The investigated lichens flora nowadays contains 500 species, 131 genera, 46 families, 14 or-ders, 5 classes of the Ascomycota phylum. The leading class is Lecanoromycetes, the leading order – Lecanorales, 10 families take the leading part.The composition of the leading families of the regional lichens flora includes families typical for Boreal flora as well as for Mediterranean flora, which reflects the heterogeneity of the investigated flora. The most significant features of lichens distribution in the Privolzhskaya upland are: phytok-horionomical and those associated with the contemporary distribution of plant cover as well as pe-culiarities caused by the geomorphological structure and floragenesis. The regional lichens flora represents a complicated heterogeneous complex of different geo-graphical lichen groups. There were distinguished 9 geographical elements and 12 arealogic groups. The investigated lichens flora includes species, the specific features of their spreading all around the world and growing on the upland at present time allow to specify those lichens as cli-matic relicts of the several geological periods. The regional lichens flora has been continuously developing since the Late Paleogene. The climatic relicts, as well as paleogeographical data allow to specify the following main stages of re-gional lichens flora formation: the Early-Middle Miocene, the Late Miocene, the Early-Middle Pliocene, the Late Pliocene, Eopleistocene, the Early-Middle Pleistocene, the Late Pleistocene, Holocene. The unique lichens flora of the Privolzhskaya upland is subject to the negative effect as a re-sult of economic activity. The modern condition of the regional lichens flora represents a serious concern. It is vitally important to work out an all-Russia Federal program for preserving natural ob-jects located on the territories that served as refuges during the Quaternary glaciers and conserve relicts of different periods. Keywords. Lichens, Russia, Privolzhskaya upland.
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1 - Institute of Ecology of the Volga river basin of Russian Academy of Sc, Komzin st., 10, Togliatty, 445003, Russia
Presentation Type: Poster:Posters for Sections
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM