Table 3.
Summary of model selection results. Variables included in best models as determined by AIC are indicated with a Y. Pseudo-R2 values given are the Cragg & Uhler's [42] pseudo-R2 for the best model. All regressions used models with Poisson error structure.
| model | number of images (S) | slope (±s.e.) | bloom period (BP) | interaction S × BP | pseudo-R2 |
|---|---|---|---|---|---|
| all beesa | Y | 0.05 ± 0.02 | Y | — | 0.594 |
| Apis bees | — | — | Y | — | 0.303 |
| non-Apis beesa | Y | 0.10 ± 0.04 | Y | — | 0.668 |
| syrphids | Y | 0.08 ± 0.72 | — | — | 0.003 |
aModels with statistically significant regression parameters at α = 0.05.