图2. 蒙古莸群落物种多样性指数与环境因子的冗余分析(RDA)排序。HPielou, 草本层Pielou均匀度指数; HRich, 草本层物种丰富度; HShannon, 草本层Shannon-Wiener多样性指数; HSimpson, 草本层Simpson多样性指数; SPielou, 灌木层Pielou均匀度指数; SRich, 灌木层物种丰富度; SShannon, 灌木层Shannon-Wiener多样性指数; SSimpson, 灌木层Simpson多样性指数。Altitude, 海拔; Latitude, 纬度; Longtitude, 经度; MAP, 年降水量; MAT, 年平均气温; MSR, 太阳辐射量。

Fig. 2. Redundancy analysis (RDA) ordinations between species diversity indices of Caryopteris mongholica communities and environmental factors. HPielou, Pielou evenness index of herb; HRich, species richness of herb layer; HShannon, Shannon-Wiener diversity index of herb layer; HSimpson, Simpson diversity index of herb layer; SPielou, Pielou evenness index of shrub layer; SRich, species richness of shrub layer; SShannon, Shannon-Wiener diversity index of shrub layer; SSimpson, Simpson diversity index of shrub layer. MAP, mean annual precipitation; MAT, mean annual air temperature; MSR, solar radiation.