雅鲁藏布江河岸植物物种丰富度分布格局及其环境解释

拉琼, 扎西次仁, 朱卫东, 许敏, 钟扬

Plant species-richness and association with environmental factors in the riparian zone of the Yarlung Zangbo River of Tibet, China

La Qiong,Zhaxi Ciren,Weidong Zhu,Min Xu,Yang Zhong

表3 雅鲁藏布江流域河岸植物群落调查样方CCA排序特征值、累计变异百分率以及环境因子与排序轴的相关关系

Table 3 Eigenvalues, cumulative variance, and correlation coefficients between CCA axes and environmental factors for the surveyed riparian plots of the Yarlung Zangbo River

排序轴 Axes 1 2 3 4 合计 Total 特征值总和 Eigenvalues 0.60 0.44 0.23 0.16 8.132 物种与环境相关系 Species-environment correlation 0.97 0.90 0.88 0.82 物种数据累计变异百分率 Cumulative percentage variance of species data 7.30 12.70 15.60 18.00 物种与环境关系累计变异百分率 Cumulative percentage variance of species-environment relationship 43.4 72.3 88.3 100 海拔 Altitude 0.94 -0.27 -0.08 -0.04 年均降雨量 Annual average precipitation -0.54 0.51 0.61 0.24 年均温度 Annual average temperature -0.92 -0.18 0.18 0.29 经度 Longitude -0.94 -0.20 0.24 0.02 植被盖度 Vegetation cover -0.01 0.70 -0.23 0.49