Table 1. The ten best environmental climate models of 28 models tested explaining variation in pigmentation intensity among Drosophila americana populations from dataset A in Wittkopp et al. (2010).
| Rank | Model | AIC | wi |
|---|---|---|---|
| 1 | SOLRAD+MDTR | 92.040 | 0.431 |
| 2 | MDTR | 93.993 | 0.162 |
| 3 | LONG | 94.090 | 0.155 |
| 4 | SOLRAD+TMIN+SOLRAD*TMIN | 95.787 | 0.066 |
| 5 | LAT+LONG | 96.033 | 0.058 |
| 6 | LAT+LONG+LAT*LONG | 97.950 | 0.022 |
| 7 | RH+SOLRAD+SOLRAD*RH | 98.220 | 0.020 |
| 8 | SOLRAD+APP+MAT | 98.513 | 0.017 |
| 9 | SOLRAD+TMIN | 98.725 | 0.015 |
| 10 | SOLRAD+APP+TMIN | 99.688 | 0.009 |
Abbreviations: AIC, Akaike information criterion; APP, mean annual precipitation (mm); LAT, latitude (°); LONG, longitude (°); MAT, mean annual temperature (°C); MDTR, mean diurnal temperature range (°C); RH, relative humidity (%); TMIN, minimum temperature of the coldest month (°C); wi, Akaike weight.
Climate variables were extracted from http://www.worldclim.org (at 2.5 arc min resolution) for data gathered over 1950–2000 and mean annual solar radiation (SOLRAD, W m−2) was obtained from the IPCC Data Distribution Centre (0.5° resolution). Only non-collinear variables were included in each model.