Table 2.
Candidate disturbance model set tested in the additive and interactive analysis
| Model group and set | Model type | Model predictors |
|---|---|---|
| Habitat only (HO) | ||
| 1a | N/A | Habitat and Spatial Variables Only |
| Linear (LI) | ||
| 2a | additive | NL + WL |
| 2b | interactive | NL + WL + NL × WL |
| Linear and energy (LE) | ||
| 3a | additive | NL + WL + WE |
| 3b | interactive | NL + WL + WE + WE × NL + WE × WL |
| 3c | interactive | NL + WL + WE + WE × NL + WE × WL + WE × NL × WL |
| Linear and forestry (LF) | ||
| 4a | additive | AL + HU |
| 4b | interactive | AL + HU + HU × AL |
| Cumulative (CU) | ||
| 5a | additive | AL + WE + HU |
| 5b | interactive | AL + WE + HU + HU × AL + HU × WE |
| 5c | interactive | AL + WE + HU + HU × AL + HU × WE + WE × AL + HU × WE × AL |
| Disturbance area (DA) | ||
| 6a | additive | all disturbances summed (combined AL, WE, HU) |
All models include habitat and spatial predictors selected for each landbird species. Stressor definitions: NL, narrow linear (percent cover of seismic lines); WL, wide linear (percent cover of pipelines, powerlines, all roads); AL, all linear (percent cover of narrow and wide linear combined); HU, harvest unit (percent cover harvest units with harvest activity <20 yr old); WE, wells (percent cover with bitumen, oil, and gas wells).