Composition and seasonal dynamics of seed rain in broad-leaved Korean pine (Pinus koraiensis) mixed forest, Changbai Mountain Species composition, structure, and spatial distribution of shrubs in broad-leaed Korean pine (Pinus koraiensis) mixed forest in Changbai Mountains. Effects of biotic and abiotic factors on tree seedling survival in a broad-leaved Korean pine (Pinus koraiensis) mixed forest on Changbai Mountain BROAD-LEAVED KOREAN PINE (PINUS KORAIENSIS) MIXED FOREST PLOT IN CHANGBAISHAN (CBS) OF CHINA: COMMUNITY COMPOSITION AND STRUCTURE