图3. 中华蚊母树群落多样性指数(A)、物种分布(B)与环境因子典范对应分析(CCA)排序图。Alti, 海拔; AP, 速效磷含量; APO, 速效钾含量; D, Simpson优势度指数; E, Pielou均匀度指数; H, Shannon-Wiener多样性指数; HN, 水解氮含量; OM, 土壤有机质含量; R, Margalef丰富度指数; S, 物种数; TN, 全氮含量; TP, 全磷含量; TPO, 全钾含量; WFS, 土壤含水量。Abu, 苘麻; Ake, 三叶木通; Alt, 喜旱莲子草; Ast, 紫云英; Bid, 狼杷草; Boe, 序叶苎麻; Car, 小梾木; Care, 羊须草; Cin, 川桂; Cor, 马桑; Cyn, 狗牙根; Cyp, 香附子; Deb, 水麻; Dis, 中华蚊母树; Ela, 佘山羊奶子; Equ, 节节草; Fic, 长柄竹叶榕; Ficu, 地果; Geu, 细叶水团花; Gna, 鼠麴草; Hou, 蕺菜; Imp, 白茅; Lig, 小叶女贞; Mis, 五节芒; Pae, 鸡矢藤; Phy, 商陆; Plo, 水蓼; Pte, 枫杨; Pter, 蕨; Pyr, 火棘; Ran, 刺果毛茛; Ros, 野蔷薇; Rum, 酸模; Sal, 水柳; Sau, 守宫木; Set, 狗尾草; Vib, 球核荚蒾; Xan, 苍耳。S1-S6为取样点, 样点信息见表1。

Fig. 3. Canonical correspondence analysis (CCA) ordination diagram of diversity index and species distribution with soil environmental factors in Distylium chinense communities. Alti, altitude; AP, available phosphorus content; APO, available potassium content; D, Simpson dominance index; E, Pielou evenness index; H, Shannon-Wiener diversity index; HN, hydrolyzed nitrogen content; OM, soil organic matter content; R, Margalef richness index; S, number of species; TN, total nitrogen content; TP, total phosphorus content; TPO, total potassium content; WFS, soil moisture. Abu, Abutilon theophrastic; Ake, Akebia trifoliata; Alt, Alternanthera philoxeroides; Ast, Astragalus sinicus; Bid, Bidens tripartita; Boe, Boehmeria clidemioides var. diffusa; Car, Swida paucinervis; Care, Carex callitrichos; Cin, Cinnamomum wilsonii; Cor, Coriaria nepalensis; Cyn, Cynodon dactylon; Cyp, Cyperus rotundus; Deb, Debregeasia orientalis; Dis, Distylium chinense; Ela, Elaeagnus argyi; Equ, Equisetum ramosissimum; Fic, Ficus stenophylla; Ficu, Ficus tikoua; Geu, Adina rubella; Gna, Gnaphalium affine; Hou, Houttuynia cordata; Imp, Imperata cylindrica; Lig, Ligustrum quihoui; Mis, Miscanthus floridulus; Pae, Paederia scandens; Phy, Phytolacca acinosa; Plo, Polygonum hydropiper; Pte, Pterocarya stenoptera; Pter, Pteridium aquilinum var. latiusculum; Pyr, Pyracantha fortuneana; Ran, Ranunculus muricatus; Ros, Rosa multiflora; Rum, Rumex acetosa; Sal, Salix warburgii Seemen; Sau, Sauropus androgynus; Set, Setaria viridis; Vib, Viburnum propinquum; Xan, Xanthium sibiricum. S1-S6 are sampling sites, the location information see Table 1.