Table 1. Candidate models considered in model selection and multimodel inference procedures.
Models were compared based on the second-order Akaike information criterion (AICc). K: number of model parameters; w: Akaike weight. Bold characters represent the best model for each response variable. INT: Proportion of intensive crops; FLO: Proportion of flowering crops; LOC: Local floral richness; JJ: Julian day.
Candidate models* | Weight | Thorax width | Wing length | Head length | Tibia length | Foraging activity | Pollen load richness | Difference pollen vs habitat | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | K | ΔAICc | w | |
1 ~ Null | 4 | 0.00 | 0.76 | 4 | 0.00 | 0.82 | 4 | 1.85 | 0.20 | 4 | 0.00 | 0.80 | 4 | 0.00 | 0.79 | 5 | 198.72 | 0.00 | 4 | 1.92 | 0.17 | 2 | 21.75 | 0.00 |
2 ~ INT + FLO | 6 | 3.38 | 0.14 | 6 | 3.76 | 0.12 | 6 | 0.00 | 0.49 | 6 | 3.51 | 0.14 | 6 | 3.36 | 0.15 | 10 | 2.38 | 0.20 | 6 | 0.00 | 0.45 | 4 | 14.74 | 0.00 |
3 ~ INT + FLO + LOC | 7 | 5.57 | 0.05 | 7 | 5.90 | 0.04 | 7 | 1.94 | 0.19 | 7 | 5.68 | 0.05 | 7 | 5.54 | 0.05 | 11 | 3.86 | 0.10 | 7 | 1.34 | 0.23 | 5 | 16.43 | 0.00 |
4 ~ INT + FLO + LOC + INT:FLO | 8 | 5.46 | 0.05 | 8 | 8.09 | 0.01 | 8 | 3.31 | 0.09 | 8 | 7.84 | 0.02 | 8 | 7.75 | 0.02 | 12 | 5.86 | 0.04 | 8 | 3.36 | 0.08 | 6 | 0.00 | 1 |
5 ~ INT + FLO + LOC + INT:FLO + INT:LOC + FLO:LOC + INT:JJ | 11 | 8.91 | 0.01 | 11 | 14.71 | 0.00 | 11 | 8.91 | 0.01 | 11 | 11.59 | 0.00 | 11 | 12.59 | 0.00 | 14 | 11.02 | 0.00 | 11 | 4.03 | 0.06 | |||
6 ~ Temperature + Time of the day | 8 | 0.00 | 0.66 |
*Temperature and time of day were also included in all models (#1 to #5) for the foraging activity response variable. The interaction INT:JJ was not included in model #5 for the foraging activity response variable.