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¹^,², 胡斌¹, 包维楷¹, 李芳兰¹^,^*(

), 胡慧¹^,², 韦丹丹¹^,², 杨婷惠¹^,², 黎小娟¹^,²

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

WANG Zi-Long¹^,², HU Bin¹, BAO Wei-Kai¹, LI Fang-Lan¹^,^*(

), HU Hui¹^,², WEI Dan-Dan¹^,², YANG Ting-Hui¹^,², LI Xiao-Juan¹^,²

图4. 西南干旱河谷植物群落及各组分生物量与环境因子的冗余分析(RDA)(n = 101)。Ca²⁺, 土壤钙离子交换量; CB, 群落生物量; CEC, 土壤阳离子交换量; H, 群落平均高度; HB, 草本生物量; HC, 草本盖度; HMf, 草本Margalef指数; Hr, 草本丰富度; HSW, 草本Shannon-Wiener指数; LB, 凋落物生物量; LC, 凋落物盖度; MAP, 年降水量; MAT, 年平均气温; Mg²⁺, 土壤镁离子交换量; SB, 灌木生物量; SC, 灌木盖度; SMf, 灌木Margalef指数; SOC, 土壤有机碳含量; Sr, 灌木丰富度; SSW, 灌木Shannon-Wiener指数; TC, 土壤总碳含量; TIN, 土壤总无机氮含量; TN, 土壤总氮含量; TP, 土壤总磷含量。

Fig. 4. Redundancy analysis (RDA) of community biomass and environmental factors in the arid valley, southwestern China (n = 101). Ca²⁺, soil calcium ion exchange capacity; CB, community biomass; CEC, soil cation exchange capacity; H, mean community height; HB, herb biomass; HC, herb coverage; HMf, herb Margalef index; Hr, herb richness; HSW, herb Shannon-Wiener index; LB, litter biomass; LC, litter coverage; MAP, mean annual precipitation; MAT, mean annual air temperature; Mg²⁺, soil magnesium ion exchange capacity; SB, shrub biomass; SC, shrub coverage; SMf, shrub Margalef index; SOC, soil organic carbon content; Sr, shrub richness; SSW, shrub Shannon-Wiener index; TC, soil total carbon content; TIN, soil total inorganic nitrogen content; TN, soil total nitrogen content; TP, soil total phosphorus content.