Additional file 1 of Nitrogen addition mediates the response of foliar stoichiometry to phosphorus addition: a meta-analysis
Creators: name: You, Chengming
name: Peng, Changhui
name: Xu, Zhenfeng
name: Liu, Yang
name: Zhang, Li
name: Yin, Rui
name: Liu, Lin
name: Li, Han
name: Wang, Lixia
name: Liu, Sining
name: Tan, Bo
name: Kardol, Paul
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Global distribution of the study sites included in the meta-analysis. Figure S2. Repeat analysis of the effects of phosphorus (P) addition on the foliar nitrogen (N) concentrations (a), foliar P concentrations (b), and foliar N to P ratios (c) for different sample sizes. Figure S3. Frequency distribution of the response ratio (RR) of phosphorus (P) addition on the foliar nitrogen (N) concentrations (a), foliar P concentrations (b), and foliar N to P ratios (c). The curves were fitted by a Gaussian function. Figure S4. Response ratios of the foliar nitrogen (N): phosphorus (P) ratios to the P addition rates (a) without N addition (b) with N addition. Different letters indicate significant differences between the P addition rates at the 0.05 level. Table S1. Comparison of the effects of phosphorus (P) addition with or without N addition on the foliar nitrogen (N) concentrations (Foliar N), foliar P concentrations (Foliar P), foliar N to P ratios (Foliar N:P), N resorption efficiency (NRE), P resorption efficiency (PRE), soil N availability (Soil N) and soil P availability (Soil P). The effect sizes indicate the mean of the effect of P addition on the variables, and 95% CI represents the 95% confidence interval. The heterogeneity between subgroups (Qb, QB) is significant at p &lt; 0.05; Qb represents the difference between each grouping variable (including the P addition rates, the experimental durations, the community and species levels and the plant growth types), and QB indicates that the effects of P addition with N addition on the target variables are different from those without N addition. Table S2. Correlation analysis of the relationship between the response ratio (RR) of the foliar nitrogen concentration (N), phosphorus (P), N to P ratios (N:P) and N and P resorption efficiencies (NRE and PRE, respectively), and soil N and P availabilities (Soil N and Soil P, respectively). The numbers in black in the upper right refer to P addition without N addition, and the numbers in blue in the lower left refer to P addition with N addition. The numbers inside and outside the parentheses represent the sample sizes and correlation coefficients, respectively. * and ** indicate the relationship is significant at the p &lt; 0.05 and p &lt; 0.01 level, respectively. Table S3. F-values from the regression analysis of the relationship between the response ratios (RRs) of foliar nitrogen (N) concentrations (Foliar N), foliar phosphorus (P) concentrations (Foliar P), foliar N to P ratios (Foliar N:P ratios), N and P resorption efficiencies (NRE and PRE, respectively) and soil N and P availabilities (Soil N and Soil P, respectively) to P addition with and without N addition and geographical [including latitude (°), longitude (°) and altitude (m)] and climatic factors [i.e., mean annual precipitation (MAP, mm) and the mean annual temperature (MAT, °C)]. Appendix S1. List of 168 articles from which data were extracted for the meta-analysis.