GAP-PHASE REGENERATION RULES OF CONIFER-BROADLEAVED MIXED FOREST IN WOLONG NATURE RESERVE, CHINA Gap Characteristics and Disturbance Regime in a Dark Coniferous Forest in Changbai Mountain Areas Spatial distribution pattern of main populations and gap makers in Picea koraiensis and Abies nephrolepis forest of Xiaoxing’an Mountains, Northeast China. Gap Related Disturbance in Mixed Mountain Forests at Mt. Dalaoling in the Three Gorges ¢ò. Topographic Patterns Characteristics of Gap Makers and Plant Diversity in Picea asperata and Abies fabri Forest in Xiaoxing’an Mountains Analysis on Spatial Distribution Pattern for Main Populations and Gap Makers in Korean Pine Broad-leaved Forest in Xiaoxing‘anling Mountains of Northeast China