A REVIEW OF GRADIENT CHANGES IN SPECIES DIVERSITY OF LAND PLANT COMMUNITIES Species Diversity of Baihua Mountain Forest Plant Community Latitudinal gradient in beta diversity of forest communities in America SPATIAL PATTERNS OF INVASIVE ALIEN PLANTS IN CHINA AND ITS RELATIONSHIP WITH ENVIRONMENTAL AND ANTHROPOLOGICAL FACTORS Latitudinal diversity gradients in bryophytes and woody plants: Roles of temperature and water availability Vernal soil respiration of Larix gmelinii Rupr. forests transplanted from a latitudinal transect