Taxonomic and geographic analyses of the agaricoid basidiomycetes biota of the Leningrad Region [Russian]

摘要

Some aspects of taxonomic and geographic analyses of the agaricoid basidiomycetes biota of the southern taiga subzone in the limits of Leningrad region are considered. As a result of comparative floristic analysis the following trends were revealed in changes of taxonomic structure of biota along the gradient middle taiga- subtaiga: increase of species diversity; decrease of the role of the genus Cortinarius and increase - of the genera Pluteus and Entoloma; decline of the total share of three leading families in the head part of taxonomic spectrum; decrease of the role of the family Cortinariaceae and increase - of the family Tricholomataceae. The geographic analysis based on the regional-zonal approach with subdivided system of zonal geographic elements shows up: the biota of agaricoid basidiomycetes in southern taiga subzone in the limits of Leningrad region might be characterized as European-Palearctic boreal-nemoral one with more expressed European and boreal features; the number of species with predominantly more southern distribution (nemoral, nemoral-meridional, southern multizonal) increases in southern taiga in comparison with the middle taiga.