Fig. 2: Individual and interactive effects of environmental stressors on the abundances of genes involved in microbial P cycling.

a Number of individual effects of environmental stressors on the abundances of the genes involved in microbial P cycling. b Boxplots of individual effects of acidification and drought on the abundances of genes involved in microbial P cycling. c Number of interactive effects of environmental stressors on the abundances of genes involved in microbial P cycling. d Interactive effects of acidification*drought on the abundances of genes involved in organic P mineralization (phoD, phnK, bpp, phoX and cphy) and inorganic P dissolution (gcd and pqqC). The error bars in the dots represent the 95% confidence interval (CI). If the 95% CI overlapped with zero, the interactive effect was considered additive. If the 95% CI did not overlap with zero, the synergistic or antagonistic interactive effects were suggested. The criteria for defining synergistic or antagonistic interactive effects are outlined in the Methods section. Total PCM: total P cycling microorganisms; Mineralization: organic P mineralization by microorganisms; Dissolution: inorganic P dissolution by microorganisms. The genes involved in microbial P cycling are listed in Table S1.