Fig. 4 Observed and predicted species richness effects for (A) community biomass, (B) net biodiversity effects, (C) selection effects, and (D) complementarity effects. Data from a current (2016-2017) and pre-existing experiments (2003-2004; Roscher et al. 2004) shown in black and grey, respectively. Null and PSF model predictions shown in green and blue, respectively. Standard error bars shown represent error from replicate field plots. Statistical analyses in Supplementary Tables 1 and 2.