Table 2.
Multimodel inference from spatial‐error simultaneous autoregressive (SAR) models of phylogenetic diversity (PD), Net Relatedness Index (NRI), and phylogenetic endemism (PE) of angiosperms and gymnosperms in all grid cells covering continental North America north of the US–Mexican border
| Model parameters | SAR‐averaged coefficients | Importance: sum Akaike weight | OLS R 2 |
|---|---|---|---|
| Angiosperms PD | 0.551 | ||
| ACC | 0.083*** | 0.993 | |
| WBL | 0.049*** | 1.000 | |
| EHET | 0.129*** | 1.000 | |
| Angiosperms NRI | 0.390 | ||
| TMIN | −0.498*** | 0.997 | |
| EHET | 0.118*** | 0.999 | |
| Angiosperms PE | 0.779 | ||
| MAT | 0.097*** | 0.605 | |
| WBL | 0.097*** | 1.000 | |
| PRS | 0.033*** | 0.821 | |
| EHET | 0.139 | 1.000 | |
| Gymnosperms PD | 0.215 | ||
| TMIN | −0.214** | 0.810 | |
| WBL | 0.264*** | 1.000 | |
| EHET | 0.328*** | 1.000 | |
| Gymnosperms NRI | 0.271 | ||
| ACC | 0.108*** | 0.560 | |
| WBL | −0.062*** | 0.680 | |
| EHET | 0.059*** | 0.633 | |
| Gymnosperms PE | 0.387 | ||
| ACC | 0.164*** | 0.958 | |
| WBL | 0.275*** | 0.995 | |
| PRS | 0.127*** | 1.000 | |
| EHET | 0.261*** | 1.000 |
Only predictors with Akaike weights exceeding 0.5 are shown. Importance values and model‐averaged standardized parameters were reported. To describe explained variance, additional adjusted R 2 values were given for the ordinary least square (OLS) multiple regressions with the same formula of the lowest AIC SARerr models.
Predictors include: MAT, mean annual temperature; TMIN, temperature of coldest month; WBL, water balance; PRS, precipitation seasonality; TES, temperature seasonality; VT, temperature change velocity since LGM; ACC, tree accessibility; EHET, elevation heterogeneity.
The significances of predictors in the lowest AIC models were given in the following scales: *** < 0.001 < ** < 0.01 < * < 0.05.