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
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王子龙, 胡斌, 包维楷, 李芳兰, 胡慧, 韦丹丹, 杨婷惠, 黎小娟
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Latitudinal patterns and underlying factors of component biomass in plant communities in the arid valley of southwest China
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WANG Zi-Long, HU Bin, BAO Wei-Kai, LI Fang-Lan, HU Hui, WEI Dan-Dan, YANG Ting-Hui, LI Xiao-Juan
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表2 西南干旱河谷植物群落及各组分生物量冗余分析(RDA)的前三轴特征值(n = 101)
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Table 2 First three axis eigenvalues of redundancy analysis (RDA) of biomass of community and component and environmental factors in arid valley, southwestern China (n = 101)
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变量 Variable | 第一轴 RDA1 | 第二轴 RDA2 | 第三轴 RDA3 | 土壤阳离子交换量 Soil cation exchange capacity | 0.22 | 0.41 | 0.19 | 土壤总磷含量 Soil total phosphorus content | -0.11 | 0.09 | 0.15 | 土壤总氮含量 Soil total nitrogen content | -0.37 | 0.08 | -0.18 | 土壤总碳含量 Soil total carbon content | -0.25 | 0.15 | -0.21 | 土壤 pH Soil pH | -0.28 | -0.25 | -0.50 | 土壤有机碳含量 Soil organic carbon content | -0.16 | 0.26 | 0.03 | 土壤钙离子交换量 Soil calcium ion exchange capacity | -0.14 | 0.11 | -0.28 | 土壤镁离子交换量 Soil magnesium ion exchange capacity | -0.47 | -0.06 | 0.24 | 土壤总无机氮含量 Soil total inorganic nitrogen content | 0.28 | 0.21 | -0.03 | 群落平均高度 Mean community height | 0.00 | 0.77 | 0.31 | 灌木盖度 Shrub coverage | -0.70 | 0.49 | 0.11 | 草本盖度 Herb coverage | 0.66 | -0.22 | 0.33 | 凋落物盖度 Litter coverage | 0.61 | 0.15 | 0.42 | 灌木丰富度 Shrub richness | -0.44 | 0.22 | 0.19 | 草本丰富度 Herb richness | -0.42 | -0.22 | 0.31 | 草本Shannon-Wiener指数 Herb Shannon-Wiener index | 0.64 | 0.61 | -0.21 | 草本Margalef指数 Herb Margalef index | 0.33 | 0.26 | -0.41 | 灌木Shannon-Wiener指数 Shrub Shannon-Wiener index | -0.63 | 0.03 | 0.16 | 灌木Margalef指数 Shrub Margalef index | -0.38 | 0.25 | 0.21 | 年降水量 Mean annual precipitation | 0.21 | 0.70 | 0.06 | 年平均气温 Mean annual air temperature | 0.65 | 0.42 | 0.07 | 群落生物量 Community biomass | 0.00 | 0.00 | 0.00 | 灌木生物量 Shrub biomass | -0.65 | 0.10 | 0.09 | 草本生物量 Herb biomass | 0.30 | -0.56 | 0.06 | 凋落物生物量 Litter biomass | 0.62 | 0.37 | 0.07 |
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