气候因子通过土壤微生物生物量氮促进青藏高原高寒草地地上生态系统功能

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王毅¹^,², 孙建²^,^*(

), 叶冲冲²^,³, 曾涛¹^,^*(

)

Climatic factors drive the aboveground ecosystem functions of alpine grassland via soil microbial biomass nitrogen on the Qingzang Plateau

WANG Yi¹^,², SUN Jian²^,^*(

), YE Chong-Chong²^,³, ZENG Tao¹^,^*(

)

图2. 气候因子、地下生物量和土壤因子与地上生态系统功能(AEF)的关系。A, AEF值与各因子间的相关性热度图, 黑色表示正相关, 红色表示负相关。相关显著性: *, p < 0.05; **, p < 0.01。B, AEF值和各因子的主成分分析。AI, 干旱指数; AMT, 年平均气温; ATP, 年降水量; BGB, 地下生物量; EMF, 生态系统多功能性; MBC, 土壤微生物生物量碳含量; MBN, 土壤微生物生物量氮含量; SAN, 土壤速效氮含量; SAP, 土壤速效磷含量; SOC, 土壤有机碳含量; STN, 土壤全氮含量; STP, 土壤全磷含量。

Fig. 2. Relationships between climate factors, belowground biomass, soil factors and aboveground ecosystem functions (AEF). A, The correlation between AEF value and each factor; black box indicates positive correlation, and red box indicates negative correlation, * and ** represented significantly correlated with AEF value (p < 0.05 and p < 0.01). B, Principal component analysis of AEF value and each factor. AI, aridity index; AMT, mean annual air temperature; ATP, mean annual precipitation; BGB, belowground biomass; EMF, ecosystem multi-function; MBC, microbial biomass carbon content; MBN, microbial biomass nitrogen content; SAN, soil available nitrogen content; SAP, soil available phosphorus content; SOC, soil organic carbon content; STN, soil total nitrogen content; STP, soil total phosphorus content.