Multivariate Analysis of Plant Communities and Permafrost Environment After the Disastrous Fire in Amuer Forest Land The effects of fire disturbance on th biodiversity of understory plant in virginal forest, northern region of Daxinganling Mountains, China STUDIES ON THE FLORA OF THE SEED PLANTS FROM THE DAXINGANLING FLORA REGION A preliminary study on wood-inhabiting fungi on charred wood in Daxinganling forest areas The impacts of Betula platyphylla on Carex pediformis and other main understory herbages pants within secondary forest of Daxinganling mountatins Demography of Larix gmclini seedling population in natural old-growth forests of north Daxinganling Mts FIRE DISTURBANCE HISTORY IN VIRGIN FOREST IN NORTHERN REGION OF DAXINGANLING MOUNTAINS STUDIES ON THE PINUS SIBIRICA (LOUD.)MAYR IN DAXINGANLING, CHINA AND ITS MORPHOLOGY