Summary of mixed-effects models evaluating measures of trait-based niches as predictors for diversity effects on species performances in terms of shoot biomass.

Alternative models were fitted with single predictor variables. Listed are AIC and Chi2 results of likelihood-ratio tests that were applied to assess model improvement and the statistical significance of the explanatory terms, where* P ≤ 0.05,** P *** P Arrows indicate positive (↑) or negative (↓) relationships of single predictors to diversity effects on shoot biomass.Summary of mixed-effects models evaluating measures of trait-based niches as predictors for diversity effects on species performances in terms of shoot biomass.