Effects of plant size and covariables on species richness of ectophagous and endophagous arthropods.

<p>Effects of plant size on species richness of (a) ectophagous and (d) endophagous herbivores and of (b, e) their respective natural enemies. Additionally, effects of important covariables representing the amount of food resource for (c, f) natural enemies are shown. SR = species richness, H = herbivores, NE = natural enemies. Species richness of herbivores and natural enemies refer to five plant individuals per plot (N = 84 plots). Axes of variables were transformed corresponding to analyses (species richness of natural enemies: sqrt-transformation). Data points in (c, f) were jittered. Predictions derive from the lme-model with the lowest AICc including all explanatory variables with a parameter weight > 0.5.