Table 3. Description of predictive models for distributions of six seabird species.
| Variable | Black-footed albatross * | Northern fulmar * | Pink-footed shearwater* | Sooty shearwater* | Red phalarope † | Red-necked phalarope † |
|---|---|---|---|---|---|---|
| Oceanography | ||||||
| SSF | Q (-) | L (+) | Q (+) | |||
| SSS | L (+) | |||||
| SST | L(+) | Q (-) | ||||
| Bathymetric Features | ||||||
| Distance to Cordell Bank | L (-) | L (-) | Q (+) | |||
| Distance to 200-m isobath | L (-) | L (-) | Lg (-) | L (-) | L (-) | |
| Depth | L (-) | Q (-) | Q (-) | |||
| Terrestrial Features | ||||||
| Distance to mainland | L (+) | |||||
| Distance to island | Q (-) | Lg (+) | ||||
| Climate Indices | ||||||
| UI 3-month lag | Q (-) | |||||
| NPGO 1-month lag | L (-) | |||||
| NPGO 2-month lag | L (+) | L (-) | ||||
| NPGO 3-month lag | Q (+) | |||||
| PDO 1-month lag | Q (-) | |||||
| PDO 3-month lag | Q (-) | Q (-) | Q (-) | L (+) | ||
| SOI current | Q (+) | |||||
| SOI 2-month lag | Q (-) | |||||
| Detection Variables | ||||||
| Sea state | L (+) | L (+) | ||||
| Swell | L (-) | |||||
| Visibility | L (-) | |||||
| Model χ2 (df) | 517.81 (37) | 586.51 (31) | 308.55 (26) | 654.80 (40) | 169.44 (18) | 117.10 (15) |
| Model P value | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
| Model Pseudo-R2 | 0.2251 | 0.2556 | 0.1315 | 0.0970 | 0.1800 | 0.0829 |
| Vuong test for zero inflation P | 0.0007 | 0.0324 | 0.0002 | |||
| Model Validation | ||||||
| Model Pseudo-R2 | 0.10900 | 0.3025 | 0.0128 | 0.0401 | 0.1444 | 0.0185 |
| Validation P value | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
Strongest relationship of predictor variable from univariate testing is depicted as linear ‘L’, quadratic ‘Q’, or log-linear ‘Lg’. Coefficient value for main effect of predictor variable (i.e. without interaction) in predictive model is depicted as positive (+) or negative (-). Dominant climate index is outlined with a box.
Foraging type is depicted by:
* (generalist) and
† (planktivorous).
Variables exhibiting a significant interaction with year are in bold. Variables represented were significant (p < 0.05) in models of each associated seabird species.