Table 3 Model selection results based on logistic regression of factors influencing the use of foraging patches by American three-toed woodpeckers compared to subplots at the Hayman Fire (2003 to 2004), Colorado, USA. Logit models are listed with the best-fitting model first and sorted by ΔAIC c . The AIC c weights (w i ), indicate the relative likelihood of each model.
a. Foraging patch vs. subplots 2003. | ||||
|---|---|---|---|---|
Model ( n = 70) a | K | AIC c | ΔAIC c | w i |
dNBR + (dNBRh)2 + dbh + TBI | 5 | 61.85 | 0.00 | 0.81 |
dNBR + (dNBR)2 + TBI | 4 | 65.55 | 3.70 | 0.13 |
dNBRh + (dNBRh)2 + dbh | 4 | 67.36 | 5.51 | 0.05 |
dNBRh + (dNBRh)2 | 3 | 70.35 | 8.50 | 0.01 |
Constant | 1 | 89.20 | 27.35 | 0.00 |
b. Foraging patch vs. subplots 2004. | ||||
Model ( n = 58) a | K | AIC c | ΔAIC c | w i |
dNBRh + dbh | 3 | 49.05 | 0.00 | 0.41 |
dNBRh + dbh + Beetlesb + TBI | 5 | 50.22 | 1.17 | 0.23 |
dNBRh + dbh + Beetles | 4 | 50.28 | 1.23 | 0.22 |
dNBRh + dbh + TBI | 4 | 51.32 | 2.27 | 0.13 |
dNBRh + TBI + Beetles | 4 | 65.10 | 16.05 | 0.00 |
dNBRh + Beetles | 3 | 67.15 | 18.10 | 0.00 |
dNBRh | 2 | 70.02 | 20.97 | 0.00 |
dNBRh + TBI | 3 | 72.12 | 23.07 | 0.00 |
Constant | 1 | 81.85 | 32.80 | 0.00 |