Home – Home – Jornals – Flora and Vegetation of Asian Russia 2022 number 3

The results of a taxonomic analysis of the lichen flora of the North-Eastern Okhotsk region (Magadan Region), which currently includes 412 species belonging to 1 division, 1 subdivision, 4 classes, 5 subclasses, 15 orders, 45 families and 133 genera, are presented. The majority of the species belongs to the class Lecanoromycetes (404 species or 98 %), which is represented by 4 subclasses - Acarosporomycetidae, Lecanoromycetidae, Ostropomycetidae and Umbilicariomycetidae. The basis of the lichen flora is represented by the Lecanorales order, which unites 10 families, 53 genera and 190 species (46 % of the total species diversity). The average number of species in the family is 9.2 in the studied lichen flora. The level of species richness exceeding this indicator belongs to 12 families, numbering a total of 313 species or 76 % of the flora. The average number of species in a genus is 3. In the studied lichen flora, 24 genera have an indicator higher than this value; they include 235 species or 57 % of the total flora. The largest genus Cladonia in the lichen flora of North-Eastern Priokhotye includes 44 species. The spectrum of the leading families of lichen flora is typical of the lichen flora of the Boreal zone of the Holarctic. Boreal features are indicated by the leading position of such families as Parmeliaceae, Cladoniaceae, Physciaceae, Lecanoraceae, Peltigeraceae, genera Cladonia, Peltigera. The high position in the spectrum of the families Rhizocarpaceae, Umbilicariaceae, Stereocaulaceae, Lecideaceae, including epilithic species, indicates the mountain character of the lichen flora. Thus, the studied lichen flora should be characterized as mountain-boreal.