西南干旱河谷植物群落组分生物量的纬度格局及其影响因素

王子龙, 胡斌, 包维楷, 李芳兰, 胡慧, 韦丹丹, 杨婷惠, 黎小娟

Latitudinal patterns and underlying factors of component biomass in plant communities in the arid valley of southwest China

WANG Zi-Long, HU Bin, BAO Wei-Kai, LI Fang-Lan, HU Hui, WEI Dan-Dan, YANG Ting-Hui, LI Xiao-Juan

表3 西南干旱河谷植物群落及各组分生物量与环境因子之间的Pearson相关系数(n = 101)

Table 3 Pearson correlation coefficient between biomass of community component and environmental factors in arid valley, southwestern China (n = 101)

变量 Variable 群落 Community 灌木 Shrub 草本 Herb 凋落物 Litter 土壤阳离子交换量 Soil cation exchange capacity 0.028 -0.011 -0.202* 0.244* 土壤总磷含量 Soil total phosphorus content -0.010 0.022 -0.088 -0.033 土壤总氮含量 Soil total nitrogen content 0.094 0.183 -0.074 -0.182 土壤总碳含量 Soil total carbon content 0.083 0.140 -0.082 -0.090 土壤pH Soil pH -0.236* -0.115 0.046 -0.418** 土壤有机碳含量 Soil organic carbon content 0.045 0.084 -0.128 -0.016 土壤钙离子交换量 Soil calcium ion exchange capacity -0.034 0.051 -0.076 -0.191 土壤镁离子交换量 Soil magnesium ion exchange capacity 0.055 0.155 -0.082 -0.213* 土壤总无机氮含量 Soil total inorganic nitrogen content 0.013 -0.046 -0.053 0.201* 群落均高 Mean community height 0.053 0.072 -0.414** 0.220* 灌木盖度 Shrub coverage 0.014 0.212* -0.483** -0.244* 草本盖度 Herb coverage 0.090 -0.100 0.282** 0.364** 凋落物盖度 Litter coverage 0.077 -0.092 0.074 0.436** 灌木丰富度 Shrub richness 0.157 0.250* -0.206* -0.097 草本丰富度 Herb richness 0.159 0.239* 0.045 -0.219* 草本Shannon-Wiener指数 Herb Shannon-Wiener index -0.155 -0.224* -0.295** 0.347** 草本Margalef指数 Herb Margalef index -0.143 -0.147 -0.151 0.082 灌木Shannon-Wiener指数 Shrub Shannon-Wiener index 0.073 0.224* -0.139 -0.314** 灌木Margalef指数 Shrub Margalef index 0.144 0.211* -0.185 -0.041 年降水量 Mean annual precipitation -0.262** -0.189 -0.449** 0.034 年平均气温 Mean annual air temperature -0.077 -0.199* -0.110 0.395**