Table 2 Model selection results based on logistic regression of factors influencing the occurrencea of American three-toed woodpeckers in survey plots at the Hayman burn (2003 to 2004), Colorado, USA. Logit models are listed beginning with the best-fitting model and sorted by ΔAIC c . AIC c weights (w i ), indicate the relative likelihood of each model.
Model (n = 28) | K | AIC c | ΔAIC c | w i |
|---|---|---|---|---|
dNBRp + (dNBRp)2 + Beetlesb | 4 | 33.64 | 0.00 | 0.45 |
Beetles | 2 | 35.37 | 1.73 | 0.19 |
dNBRp + (dNBRp)2 + Beetles + dbh | 4 | 36.48 | 2.84 | 0.11 |
dNBRp + (dNBRp)2 + dbh | 5 | 36.55 | 2.91 | 0.10 |
dNBRp + (dNBRp)2 | 4 | 37.29 | 3.65 | 0.07 |
dbh | 3 | 37.70 | 4.07 | 0.06 |
Constant | 2 | 40.38 | 6.75 | 0.02 |
dNBRp | 1 | 42.24 | 8.60 | 0.00 |