Table 4. Summary of results for ecoregion 1 (Northern White Mountain) habitat models with their associated Akaike weights. N = 59 lakes. Models with empirical support, i.e., ΔiAICc ≤ 2, are indicated in bold.

Model Scale R² K† Log likelihood AICc ΔiAICc Weight wi AUC
2 Multiscale 0.87 3 −6.68 19.80 < 0.001 0.2444 0.989
5 Foraging 0.73 2 −7.86 19.93 0.14 0.2281 0.968
3 Catchment 0.72 2 −8.20 20.61 0.81 0.1627 0.951
4 Riparian 0.72 2 −8.26 20.74 0.94 0.1526 0.952
6 Nesting, 150-m radius 0.76 2 −8.46 21.14 1.34 0.1249 0.959
1 Global model 0.86 5 −5.36 21.85 2.06 0.0874 0.988
 
Explanatory variables for each fitted model‡
2 Multiscale lake size (+), open water 500N (+)
5 Foraging open water 500N (+)
3 Catchment lake size (+)
4 Riparian lake size (+)
6 Nesting, 150-m radius lake size (+)
1 Global model elevation (+), lake size (+), clarity (+), open water 500N (+)
 
Composite model: Nest presence = −8.655 + 3.127 (lake size) + 1.570 (open water 500N)
 
†K indicates the total number of parameters, i.e., the intercept and explanatory variables.
‡(+) = positive association, (−) = negative association, L = lake scale, N = nest scale.