Аннотация:Zvenigorod Biological Station of Moscow State University (ZBS MSU; 715.4 ha) is situated not far
from Moscow (Russia). The main part of the territory is covered with aged forest. So the last years were rich in fallen trees. This sad phenomenon allowed study of trees all trunk long. The most common trees are Acer platanoides, Betula pendula, Picea abies, Pinus sylvestris, Populus tremula, Salix alba, S. fragilis. 32 macrolichen species are found on the bark in total (foliose – 20, fruticose – 12). The greatest number of species are typical for Salix and Populus. Hypogymnia physodes and Parmelia sulcata could be found on every tree. Lichen’s abundance increases monotonically to the upper branches. The area of birch trunk occupied by lichens at 10 m high is about 30%, but at 25 m it is more than 70%. Lichen society complex changes great with height and many species one can find only above 10 m.