Association between environment and community of Pinus taiwanensis in Daiyun Mountain Relationships between Submerged Plants Community Composition and Hydro-Environmental Factors in Xizhuojiaying Wetland, Beijing Quantitative analysis of relationships between spatial and temporal variation of soil moisture content and environmental factors at a gully catchment of the Loess Plateau The ordination axes clustering based on detrended canonical correspondence analysis ordination and its application to the analysis of the ecological gradients of plant communities