Microbial community and its activities in canopy- and understory humus of two montane forest types in Ailao Mountains, Northwest China. A M0SSY F0REST APPEARING IN THE SCLEROPHYLLOUS EVERGREEN BROAD-LEAF FORESTS ----QUERCETUM PANNOSUM NIMB0RUM The Dominant Species of the Dwarfing Mossy Forest on the Summit of Mt. Ailao in Jingdong Yunnan Lithocarpus pachy Phylloides