Table 5.
Results of the multivariate multiple regressions
| Predictor Variable | Proportion of the explained genetic variation | ||
|---|---|---|---|
| Marginal | Conditional | Sequential | |
| Phenotype (sub-species definition) | 0.2204 | 0.0156 | 0.0010 |
| Ecoregions | 0.0081 | 0.0075 | 0.0010 |
| Climate (all variables) | 0.8529 | 0.4812 | 0.4812 |
| Climate (per variable) | |||
| Temperature Seasonality (SD * 100) | 0.4856 | 0.2797 | 0.2797 |
| Precipitation Seasonality (CV) | 0.4118 | 0.1427 | 0.1100 |
| Mean Monthly Temperature Range | 0.1216 | 0.0472 | 0.0207 |
| Precipitation of Wettest Quarter (mm) | 0.0379 | 0.0249 | 0.0197 |
| Minimum Temperature of Coldest Month | 0.0195 | 0.0012 | 0.0154 |
| Temperature Annual Range | 0.3210 | 0.1919 | 0.0130 |
| Isothermality (2/7) (* 100) | 0.4364 | 0.2165 | 0.0106 |
| Precipitation of Driest Quarter (mm) | 0.2885 | 0.0685 | 0.0079 |
| Mean Temperature of Wettest Quarter | 0.1566 | 0.0846 | 0.0028 |
| Precipitation of Coldest Quarter (mm) | 0.0463 | 0.0080 | 0.0012 |
| Precipitation of Warmest Quarter (mm) | 0.0786 | 0.0552 | -- |
| Mean monthly minimum Temperature | 0.0734 | 0.0605 | -- |
| Mean Temperature of Coldest Quarter | 0.0510 | 0.0089 | -- |
| Mean Temperature of Warmest Quarter | 0.2424 | 0.1662 | -- |
| Mean Temperature of Driest Quarter | 0.0634 | 0.0461 | -- |
| Annual Mean Temperature | 0.1296 | 0.0894 | -- |
| Precipitation of Wettest Month (mm) | 0.0312 | 0.0207 | -- |
| Annual Precipitation | 0.0830 | 0.0480 | -- |
| Mean monthly maximum Temperature | 0.1615 | 0.0988 | -- |
| Precipitation of Driest Month (mm) | 0.2880 | 0.0743 | -- |
| Maximum Temperature of Warmest Month | 0.2987 | 0.1965 | -- |
Analyses were carried out for 150 individual mitochondrial sequences of burrowing parrots, 21 bio-climatic parameters, morphological subspecies identity, and Chilean and Argentinean eco-regions.
--, added < 0.000001 to the regression sum of squares; CV: coefficient of variation; SD: standard deviation. No. of permutations = 9999. Temperature Seasonality: the standard deviation of the weekly mean temperatures expressed as a percentage of the mean of those temperatures (i.e. the annual mean). Precipitation Seasonality: the standard deviation of the weekly precipitation estimates expressed as a percentage of the mean of those estimates (i.e. the annual mean). See also Additional file 1 Table S1.