Fig. 2: Effects of phosphorus (P) addition on plant biomass across growth forms and experimental settings. | Nature Communications

Fig. 2: Effects of phosphorus (P) addition on plant biomass across growth forms and experimental settings.

From: Leaf economic strategies drive global variation in phosphorus stimulation of terrestrial plant production

Fig. 2

a Average effects (%) of P addition on plant biomass among growth forms for all data. b Average effects (%) of P addition on plant biomass under different experimental settings. Points and error bars represent the bootstrapped mean and 95% confidence interval, respectively. The numbers outside and inside parentheses indicate the number of observations and plant species, respectively. If the 95% confidence interval do not overlap zero, the effects of P addition on plant biomass are considered significant (two-sided test, p < 0.05); otherwise, the effect of P addition is considered not significant. The p values indicate a significant level between growth forms or experimental settings, based on linear mixed models with ‘growth form’ or ‘experiment type’ as fixed factors and ‘study’ as a random factor, tested using two-sided F-tests with Satterthwaite approximation of degrees of freedom. Source data are provided as a Source Data file.

Back to article page