SPATIAL PATTERNS OF INVASIVE ALIEN PLANTS IN CHINA AND ITS RELATIONSHIP WITH ENVIRONMENTAL AND ANTHROPOLOGICAL FACTORS Latitudinal gradient in beta diversity of forest communities in America A REVIEW OF GRADIENT CHANGES IN SPECIES DIVERSITY OF LAND PLANT COMMUNITIES 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