Figure 4

Patterns of βNTI (a,b) and βNRI (c,d) in N deposition experiments. Boxplot was used to show βNTI patterns for all pairwise community comparisons between N levels (a) and within N levels (b). Boxes represented the median and 25th/75th percentile and the solid lines extended to 1.5 times the interquartile range. βNRI values were fitted against Ln-transformed absolute differences in N deposition rates (between N levels; c) and the raw N deposition rates (within N levels; d) using segmented regression approach. The corresponding statistics were provided in each panel. Horizontal dashed lines denoted values of +2 or −2, and the values beyond which an individual β-deviation value was considered statistically significant. Grey bands represented the bootstrapped 95% confidence intervals.