Gap formation features of humid evergreen broad-leaved forest in central subtropical Wawushan Mountain,Sichuan Province,China Influence of topography on coarse woody debris in a mixed broadleaved-Korean pine forest in Xiaoxing′an Mountains, China Spatial point pattern analysis for coarse woody debris in a mixed broadleaved-Korean pine forest in Xiaoxing′an Mountains, China Spatial point pattern analysis of Abies georgei var. smithii in forest of Sygera Mountains in southeast Tibet, China. A character study on the dead wood of primeval Abies of Sejila Mountain in Southeastern Tibet