Fig. 3: Structural equation model of the N-driven mode and the P-driven mode based on additional treatments (sample size: n = 90).
From: Large-scale experimental evidence of carbon-mediated N and P co-amplification in proglacial soils
Red lines indicate positive path coefficients, and green lines indicate negative path coefficients. Arrow widths indicate the strength of standardized path coefficients. The numbers associated with the arrows indicate the path coefficients. R2 values indicate the proportion of variance explained by variables. p < 0.001: ***, p < 0.05: *. NH4+–N: ammonium N; cbbL: C fixation genes cbbL; amoA: amoA genes—ammonia oxidation genes associated with nitrification process; DOC: dissolved organic C; (NOx−–N: nitrate and nitrite N; gcd: gcd genes associated with acid production process; LMWOA: low-molecular-weight organic acids; AP: available P; nifH: nitrogen fixing gene nifH; Nase: nitrogenase. A Structural equation model of the N-driven mode based N addition treatments. B Structural equation model of the P-driven mode based P addition treatments.
