Phytosociological structure of Cladonio-Pinetum Juraszek 1927 of the Western Polissya of Ukraine

The article presents species composition of lichens occurring in the Cladonio-Pinetum Juraszek 1927dry pine forests that have been identified in the Western Polissya. On 14 sample plots established in the above association, there were found altogether 15 lichen species representing two genera, i.e.CladoniaL.and Cetraria Ach., that were accompanied by four species of mosses. The area of lichen cover varied significantly within the range of 0.4-34.1%. Four species (Cladonia rangiferina, C. mitis, C. uncialis, and C. gracilis out of 15 occurred on all sample plots, while C. digitata was slightly represented on three sample plots, only. There was found a clear relationship between the size of the area covered with lichens and the age of dry pine forests. The dynamics and type of these time related changes varies depending of the dynamics of each individual species of lichen.