长期人为干扰对桂西北喀斯特草地土壤微生物多样性及群落结构的影响

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裴广廷¹^,², 孙建飞¹^,², 贺同鑫¹^,²^,^*(

), 胡宝清¹^,²

Effects of long-term human disturbances on soil microbial diversity and community structure in a karst grassland ecosystem of northwestern Guangxi, China

PEI Guang-Ting¹^,², SUN Jian-Fei¹^,², HE Tong-Xin¹^,²^,^*(

), HU Bao-Qing¹^,²

图4. 桂西北喀斯特草地生态系统土壤性质与土壤微生物多样性和群落结构的冗余分析。A, 细菌多样性。B, 细菌群落结构。C, 真菌多样性。D, 真菌群落结构。C:N, 碳氮比; FRB, 细根生物量; M, 含水量; MBC, 微生物生物量碳含量; MBN, 微生物生物量碳含量; SOC, 有机碳含量; TN, 总氮含量。Chao1, Chao1指数; PD, 谱系多样性指数; Shannon, 香农指数。Aci, 酸杆菌门; Act, 放线菌门; Asc, 子囊菌门; Bac, 拟杆菌门; Bas, 担子菌门; Chl, 绿弯菌门; Chy, 壶菌门; Fir, 后壁菌门; Gem, 牙单胞菌门; Glo, 球囊菌门; Nit, 硝化螺旋菌门; Pla, 浮霉菌门; Pro, 变形菌门; Tec, 护微菌门; Zyg, 接合菌门。

Fig. 4. RDA analysis for the relationship between soil properties and microbial diversity and community in a karst grassland ecosystem of northwestern Guangxi, China. A, bacterial diversity. B, bacterial community structure. C, fungal diversity. D, fungal community structure. C:N, carbon-nitrogen ratio; FRB, Fine root biomass; M, moisture; MBC, microbial biomass carbon content; MBN, microbial biomass nitrogen content; SOC, soil organic carbon content; TN, total nitrogen content. Chao1, Chao1 index; PD, Pedigree diversity index; Shannon, Shannon index. Aci, Acidobacteria; Act, Actinobacteria; Asc, Ascomycota; Bac, Bacteroidetes; Bas, Basidiomycota; Chl, Chloroflexi; Chy, Chytridiomycota; Fir, Firmicutes; Gem, Gemmatimonadetes; Glo, Glomeromycota; Nit, Nitrospirae; Pla, Planctomycetes; Pro, Proteobacteria; Tec, Tectomicrobia; Zyg, Zygomycota.