Table 1.
Model selection statistics for the analysis of the effects of GDD>0°C during the spring of pollination, potentially acidifying deposition, their interaction, infection rate with M. bipunctatus, cone density and shrub height on the viability of SP2 seed
| Intercept | Growing degree-days (GDD) pollination | Potentially acidifying deposition (PAD) | GDD:PAD | Infection rate with M. bipunctatus | Cone density | Shrub height | d.f. | ΔAICc | Weight |
|---|---|---|---|---|---|---|---|---|---|
| 3·50 | –3·09 × 10−3 | –11·9 | + | 8 | 0 | 0·48 | |||
| 3·55 | –3·02 × 10−3 | –0·0979 | –12·1 | + | 9 | 1·85 | 0·19 | ||
| 3·40 | –3·12 × 10−3 | –11·7 | + | + | 10 | 1·92 | 0·18 | ||
| 3·96 | –3·41 × 10−3 | –0·447 | 3·27 × 10−4 | –12·4 | + | 10 | 3·72 | 0·08 | |
| 3·45 | –3·06 × 10−3 | –0·0951 | –11·9 | + | + | 11 | 3·78 | 0·07 | |
| Importance | 1·00 | 0·34 | 0·07 | 1·00 | 0·26 | 1·00 | – | – | – |
+, a factorial variable is included in the model.
ΔAICc, difference in values of the corrected Akaike Information Criterion between a model and the best model; weight, Akaike weight indicating the relative support for the model; importance, the relative importance of the explanatory variables based on the sum of the Akaike weights of the models in which the variables appear.