Figure legends
Figure 1. Common garden. Early-season relative differences in species growth rates in monoculture (\({\text{RGR}_{t}}_{\text{ij}},\ t=53\)) predict relative differences in species biomass (\(B_{\text{ij}}\)) at harvest date (\(t=171\)) in A) ten pairwise mixtures of five species and B) ten combination of pairs of species within five species mixtures under productive (left panels) and unproductive (right panels) conditions. Relative differences were calculated as the natural logarithm of the ratio between pairs of species in a treatment combination. Al =Alopecurus pratensis , An =Anthoxanthum odoratum ,Ar =Arrhenatherum elatius , F =Festuca rubra ,H =Holcus lanatus . The grey region indicates the 95% confidence interval around the regression.
Figure 2. Field experiment. RGR predicts competitive dominance and exclusion. A) Early-season relative differences in species growth rates in a nutrient addition combination (\({\text{RGR}_{t}}_{\text{ij}}\)) predict relative differences in species biomass in pairs of species combinations of the respecting nutrient addition combination (\(B_{\text{ij}}\)) at harvest date (\(t=213-221\)). B) Early season growth rate in a nutrient addition combination (RGR) predicts the likelihood of a species to be lost in the respecting nutrient addition combination (Likelihood of loss; a species was considered lost when it was present in a plot in 2011 and absent from that plot in 2013). Dots in Fig. B indicate RGR at day t of species that were lost (1) or not lost (0). Results are shown for the day t at which the percentage of variation explained by the regression (R2) was maximum for each nutrient addition combination (see Fig. S2). Within each graph (A, B) fertile conditions with added N (right) are separated from less fertile conditions without added N (left). The grey region indicates the 95% confidence interval around the regression.