Model selection results for 2011.

Relative variable importance weights and parameter estimates with 95% confidence intervals for all variables from models predicting pumpkin yield in 2011. Significant factors are denoted with * (P<0.05). Variables included: bee visitation frequency to pumpkin flowers (Apis mellifera, Peponapis pruinosa, and Bombus impatiens), field size, and supplementation treatment (B. impatiens supplemented, A. mellifera supplemented and nonsupplemented).