Fig 1. Bivariate relationships between plant species richness and the diversity indices.

abundance (a and b), species richness (c and d), Shannon evenness (e and f) and dominance (g and h) for herbivores (left panel) and carnivores (right panel). All response variables were standardized by removing the block effect, ie by substracting from each experimental unit (n = 80) the average value measured in the respective block. Abundance was log10-transformed and evenness logit-transformed. The lines show fitted regression lines from linear models, and solid lines indicate significant diversity effects (p <0.05). The R² values were taken from the linear models. Diversity indices and the fitted regression lines from the models were back-transformed to the original scale.