Summary of the Wald χ2-test for the GLMM to analyze the factors affecting seed predation (proportion of full samaras predated in each depot).

Microhabitat (M) refers to open vs. shrub cover; foragers (F) refers to depot type (exclosures) for different guild of seed foragers; samara quality (Q) is the proportion of empty samaras in the depot and samara availability (A) is the natural availability of samaras in the study area. Data for the best-fitting model (ΔAIC = 0); AIC = 282.4; Akaike weight = 0.69; Residual deviance = 258.4. Confidence intervals for the parameter estimates of this model and the randomized models are shown in Table S1 (bootstrapping).