ON THE FLORA OF SEED PLANTS IN LISHAN MOUNTAINS, SHANXI PROVINCE Interspecific segregation in Juglans mandshurica communities in Lishan Mountain, Shanxi Province Quantitative Classification and Ordination of Juglans mandshurica Communities in Lishan Nature Reserve, Shanxi Interspecific association and correlation of dominant species of Lishan Mountain meadow in Shanxi Province Interspecific Segregation in Carpinus cordataCommunities in Lishan Nature Reserve,Shanxi Vertical distribution of algae in semi-desert soil of Shapotou area,Ningxia Hui Autonomous Region Effects of disturbanceby tourism on plant diversity in Lishan subalpine meadow, Shanxi Province