Vertical distribution of macrolichens on the birches near Petropavlovsk-Kamchatskii

Species composition and frequency of occurrence of macrolichens on Betula ermanii and B. platyphylla are studied. Frequency of occurrence of most species of these lichens is less than 10%. Frequency of occurrence of some species on different trunk levels was considerably different. Usually, frequency of occurrence of macrolichens on B. ermanii was higher than on B. platyphylla . Distribution of ten dominant species on different trunk height was studied applying one-factored ANOVA. Cladonia coniocraea, Parmelopsis sp., and Vulpicida pinastri occur preferably on trunk bottoms. Cetraria sepincola was homogeneously on trunks of both birch species. Hypogymnia physodes, Parmelia squarrosa , and P. sulcata are definitely confined to the middle part of trunks and branches only on B. ermanii . On B. platyphylla , these species are homogeneously distributed.