Table 1.
Analysis of bee susceptibility to infection as a function of species identity, inoculum source colony, floral traits, bee traits, and bee foraging behavior, using generalized linear models with each focal variable as the one covariate (see text for details). Only the Species model includes data on Helianthus. Source file: SpeciesTraitsAndSusceptibility.R and scripts that it sources; Dryad repository.
| Variable | p value1 | χ2 | n | Coefficient |
|---|---|---|---|---|
| Species | 0.029 | 10.146 | 350 | - - - |
| Inoculum Source | 0.443 | 4.779 | 281 | - - - |
| Nectar Volume | 0.550 | 0.357 | 297 | −0.058 |
| Number of Open Flowers | 0.323 | 0.978 | 304 | 0.004 |
| Corolla Size | 0.501 | 0.453 | 310 | −0.006 |
| Corolla Shape | 0.152 | 2.057 | 310 | −0.050 |
| Repro. Structures per Infl. | 0.009 | 6.751 | 310 | 0.004 |
| Floral Longevity | 0.274 | 1.119 | 215 | 0.066 |
| Bee Size | 0.042 | 4.155 | 292 | −0.871 |
| Total Time Foraging (min) | 0.057 | 3.616 | 303 | 0.054 |
| Number of Flowers Probed | 0.993 | 0 | 304 | 0 |
| Number of Inoc. Drops Probed | 0.789 | 0.071 | 303 | 0.007 |
1
p-values were obtained from summary.gam (for Species, fitted as a random effect) or drop1 with test= “Chisq” (all others, fitted as fixed effects), χ2 is the value of the test statistic which has an approximately chi-square distribution, n is the sample size and coefficient is the coefficient of the focal variable in the linear predictor.