Table 2. Random forest models for each phenotypic trait and the percentage of phenotypic variance they explain.
For most traits, the combined models that include environmental and geographic variables together explain more of the phenotypic variation than the environmental only and geographic only models. When LONG is in cursive it means that it was not among the top variables of that particular model (Fig. 5), but was included to take into account spatial autocorrelation. The most important variable of the models is on the left, diminishing in importance towards the right.
| Traits | Best models including environmental and geographic variables. | % of phenotypic variation explained by the models including environmental and geographic variables. | % of phenotypic variation explained by environmental variables only | % of phenotypic variation explained by geographic variables only (i.e., LAT, LONG) |
|---|---|---|---|---|
| Body Dimensions | ||||
| Body length | LAT, Bio4, Bio11, Bio2, LONG | 14.95% | 11.82% | 9.96% |
| Hindfoot length | Bio11, LONG, LAT, Bio4 | 12.75% | 3.39% | 10.77% |
| Tail length | LAT, LONG, Bio4, Bio1, Bio11 | 47.42% | 36.91% | 50.05% |
| Ear length | Bio1, LAT, Bio4, ROUGH, LONG | 13.11% | 11.51% | −1.73% |
| Skin Pigmentation | ||||
| Tail pigmentation | LONG, LAT, Bio4, Bio11, Bio15 | 62.56% | 60.0% | 61.14% |
| Ear pigmentation | LONG, Bio15, Bio4, LAT | 62.18% | 49.07% | 60.78% |
| Toe ventral pigmentation | LAT, Bio 19, LONG, Bio4, Bio11 | 59.86% | 57.57% | 58.9% |
| Toe dorsal pigmentation | LAT, Bio11, Bio15, Bio1, LONG | 31.17% | 27.38% | 34.5% |
| Face coloration | ||||
| Rostrum lightness | LAT, Bio4, LONG, Bio11, Bio19 | 76.04% | 73.64% | 74.82% |
| Temporal lightness | LONG, LAT, Bio4, Bio11, Bio15 | 78.34% | 72.29% | 79.04% |
| Cheek lightness | ||||
| F | LAT, Bio4, Bio11, Bio19, LONG | 13.75% | 5.74% | 16.87% |
| M | LAT, Bio11, Bio4, Bio15, LONG | 29.75% | 27.65% | 24.06% |
| Torso lightness | ||||
| F | Bio4, Bio12, LAT, Bio11, LONG | 19.88% | 18.45% | 14.76% |
| M | Bio4, Bio11, LAT, Bio12, LONG | 14.41% | 15.78% | 0.25% |
Notes.
- F
- Females
- M
- Males
- Bio1
- annual mean temperature
- Bio2
- mean diurnal range
- Bio4
- temperature seasonality
- Bio11
- mean temperature of coldest quarter
- Bio12
- annual precipitation
- Bio15
- precipitation seasonality
- Bio19
- precipitation of coldest quarter
- ROUGH
- surface moisture
- LAT
- latitude
- LONG
- longitude