Table 2 Multiple regression model of phenotype–environment associations in hoary bats. The reduced model included six variables (in regular font), of which three showed a significant association with phenotypic variability. Multiple R2 = 0.585, adjusted R2 = 0.566; F-statistic = 31.2 on 6 and 133 DF; overall model P < 2.2e−16. Estimated variance inflation factors (VIF) for all variables in the reduced model are below 5, indicating low degree of multicollinearity. Two variables in the full model (bio15 and bio17, shown in italics) exceeded the VIF threshold of 5 and were excluded in the reduced analysis due to collinearity. Regression plots for each variable in the reduced model and variance inflation factors estimates are presented in Supplementary Fig. S4. Significant values are in bold.
Variable | Description | Slope | t value | Pr(> |t|) | VIF |
|---|---|---|---|---|---|
bio4 | Temperature seasonality | + | 4.035 | 9.16e−05 | 3.0 |
bio5 | Max. temperature of warmest month | + | 1.109 | 0.2693 | 1.1 |
bio16 | Precipitation of wettest quarter | − | 1.571 | 0.118 | 1.5 |
bioalt | Elevation | NA | 1.908 | 0.058 | 1.2 |
lat | Latitude | + | 5.655 | 9.13e−08 | 1.8 |
lon | Longitude | NA | 2.216 | 0.028 | 2.6 |
bio15 | Precipitation seasonality | NA | − 0.021 | 0.983 | 6.7 |
bio17 | Precipitation of driest quarter | NA | − 1.723 | 0.087 | 9.1 |