TY JOUR TI THE STRUCTURE PECULIARITIES OF THE LARCH LICHEN COMMUNITIES IN THE VALLEY LIGHT FORESTS OF THE POLAR URALS AND THE ADJACENT PLAINS KW species diversity KW frequency KW coverage KW lichen KW Polar Urals JO Bulletin of KSAU AU Ryabitseva, N.Y. PY 2014 IS PB Krasnoyarsk State Agrarian University