地形和土壤特性对亚热带常绿阔叶林内植物功能性状的影响

丁佳, 吴茜, 闫慧, 张守仁

Effects of topographic variations and soil characteristics on plant functional traits in a subtropical evergreen broad-leaved forest

Jia Ding, Qian Wu, Hui Yan, Shouren Zhang

图2 功能性状与地形因子(a)和土壤因子(b)的RDA约束排序分析的双标图。 图中实线特征向量表示功能性状, 虚线特征向量表示地形因子,横纵坐标表示负荷量。Chl, 叶绿素含量; Fv/Fm, PSII的最大光化学效率; PIABS, 基于光能吸收的PSII光化学综合性能指数; Ksp, 枝条比导率; SD, 气孔密度; T, 叶片厚度; SLA, 比叶面积; LL/LW, 叶长/宽比; mean elevation, 平均海拔; convexity, 凹凸度; TC, TN, TP, 土壤全碳、全氮、全磷含量; moisture, 土壤含水量; N/P, 土壤氮/磷比。

Fig. 2 Biplots of RDA analysis between functional traits and topological variations (a), and soil parameters (b). Functional traits are displayed in solid arrows and topological data in dashed arrows. Chl, Chlorophyll content; Fv/Fm, Maximal photochemical efficiency of photo system II; PIABS, Performance index on basis of light energy absorption; Ksp, Stem sapwood xylem specific hydraulic conductivity; SD, Stomata density; T, Leaf thickness; SLA, Specific leaf area; LL/LW, Ratio of leaf length to leaf width; TP, TC and TN, Content of total soil carbon, nitrogen and phosphorus, respectively; N/P, Ratio of nitrogen to phosphorus.