The effect of traveling on the interspecific correlation of dominant populations in Lishan subalpine meadow,Shanxi Province Interspecific Correlations among Dominant Tree Species in the Coniferous and Broad-Leaved Mixed Forest Communities in Jiaohe, Jilin Province Inter-Specific Correlations among Dominant Populations of Woody Syringa reticulata Communities in Wulu Mountain Nature Reserve, Shanxi Province of China INTER-SPECIFIC CORRELATIONS AMONG DOMINANT POPULATIONS OF TREE LAYER SPECIES IN EVERGREEN BROAD-LEAVED FOREST IN JIULIANSHAN MOUNTAIN OF SUBTROPICAL CHINA Comparative analysis of inter-specific association within the Stipa grandis-S. krylovii community in typical steppe of Inner Mongolia, China