图3. 生态系统功能指标及使用情况。A, 碳循环, 文献使用比例大于10%的指标, 主图为不考虑期刊影响因子, 右上角小图为考虑影响因子。AGB, 地上生物量; BG, β-1,4-葡萄糖苷酶; BGB, 地下生物量; LD, 凋落物分解; SOC, 土壤有机碳。B, 碳循环, 不考虑期刊影响因子时文献使用比例在5%-10%的指标。AC, 芳香族化合物; AMF, 丛枝菌根真菌; BC, β-D-纤维二糖苷酶; DOC, 溶解有机碳; He, 己糖; MBC, 微生物生物量碳; Pe, 戊糖; Ph, 酚类化合物; SOM, 土壤有机质; SR, 土壤呼吸。C, 氮循环, 文献使用比例大于10%的指标, 主图为不考虑期刊影响因子, 右上角小图为考虑影响因子。AvN, 有效氮; NH₄⁺, 铵根离子; NO₃^-, 硝酸根离子; PN, 植物氮含量; STN, 土壤总氮。D, 氮循环, 不考虑期刊影响因子时文献使用比例在5%-10%的指标。AA, 氨基酸; AR, 氨化速率; LAP, 亮氨酸氨基肽酶; NAG, β-1,4-N-乙酰葡糖胺糖苷酶; NMR, 氮矿化速率; NR, 硝化速率; SP, 土壤蛋白; Ur, 脲酶。E, 磷循环和水循环, 主图为不考虑期刊影响因子时文献使用比例大于5%的指标, 右上角小图为考虑影响因子时文献使用比例大于10%的与磷循环相关的指标。AvP, 有效磷; Ps, 磷酸酶; PP, 植物磷含量; SIP, 土壤无机磷; SM, 土壤含水量; STP, 土壤总磷; SWHC, 土壤持水能力。F, 涉及碳、氮、磷、水循环的所有指标所占比例。

Fig. 3. Indicators of ecosystem function and their applications in literature. A, Carbon cycle indicators with the proportion of literature appearance greater than 10%. The main panel displays values without considering journal impact factor, and the insert displays values considering the journal impact factor. AGB, aboveground biomass; BG, β-1,4-glucosidase; BGB, belowground biomass; LD, litter decomposition; SOC, soil organic carbon. B, Carbon cycle indicators with the proportion of literature appearance between 5% and 10%, without considering journal impact factor. AC, aromatic compounds; AMF, arbuscular mycorrhiza fungi; BC, β-D-cellobiosidase; DOC, dissolved organic carbon; He, hexose; MBC, microbial biomass carbon; Pe, pentose; Ph, phenolic compounds; SOM, soil organic matter; SR, soil respiration. C, Nitrogen cycle indicators with the proportion of literature appearance greater than 10%. The main panel displays values without considering journal impact factor, and the insert displays values considering journal impact factor. AvN, available nitrogen; NH₄⁺, ammonium; NO₃^-, nitrate; PN, plant nitrogen content; STN, soil total nitrogen. D, Nitrogen cycle indicators with the proportion of literature appearance between 5% and 10%, without considering journal impact factor. AA, amino acid; AR, ammoniation rate; LAP, leucine aminopeptidase; NAG, β-1,4-N-acetylglucosaminidase; NMR, nitrogen mineralization rate; NR, nitrification rate; SP, soil protein; Ur, urease. E, Phosphorus cycle and water cycle indicators with the proportion of literature appearance greater than 5%. The insert displays values of the phosphorus cycle indicators with the proportion of literature appearance greater than 10%, considering journal impact factor. AvP, available phosphorus; PP, plant phosphorus content; Ps, phosphatase; SIP, soil inorganic phosphorus; SM, soil moisture; STP, soil total phosphorus; SWHC, soil water holding capacity. F, Percentage of all indicators related to carbon, nitrogen, phosphorus and water cycles.