Statistics: effect of plant diversity on insect abundance.

Results of a generalised linear mixed model describing the abundances of the herbivorous weevil Mecinus pascuorum and the parasitoid Mesopolobus incultus in the field. Estimates (β) with standard errors (SE) are given for the minimal adequate model (evaluated by Akaike information criterion (AIC)). P values are marked bold if significant. Direction of relationship is given in parenthesis. Seventy-seven plots were involved in the analysis. a ln transformed; NA: excluded from the model; –: not included in the full model.