Table 2.
Ecological variables included in the Maxent model to predict the potential distribution of I. scapularis in Minnesota
| Variable | MN rangea | Presence points rangea | Maxent rangea |
|---|---|---|---|
| Mean diurnal temperature range (°C) | 9.8–13.5 | 10.0–13.0 | 9.9–13.5 |
| Maximum temperature during the warmest month (°C) | 21.8–30.1 | 23.6–28.8 | 21.8–29.9 |
| Annual temperature range (°C) | 40.2–50.5 | 40.6–48.5 | 40.2–50.1 |
| Precipitation during the wettest quarter (mm) | 214–336 | 275–324 | 221–336 |
| Precipitation during the coldest quarter (mm) | 39–116 | 50–80 | 39–116 |
| Elevation (m) | 175–668 | 190–492 | 177–660 |
| Land coverb | % MN | % Presence points | % Maxent predicted presence |
| Cool temperate forest | 14.3 | 52.0 | 67.1 |
| Lowland and montane boreal forest | 13.6 | 28.0 | 15.7 |
| Temperate flooded and swamp forest | 5.8 | 16.0 | 8.7 |
| Temperate grassland, meadow and shrubland | 1.4 | 4.0 | 5.6 |
| Developed and urban | 5.4 | 0.0 | 1.9 |
| Recently disturbed or modified | 1.8 | 0.0 | 0.5 |
| Temperate and boreal freshwater wet meadow and marsh | 1.5 | 0.0 | 0.4 |
| Boreal flooded and swamp forest | 10.8 | 0.0 | 0.1 |
| Herbaceous agricultural vegetation | 45.5 | 0.0 | < 0.1 |
| Introduced and seminatural vegetation | < 0.1 | 0.0 | < 0.001 |
a
The range for the entire state is reported in addition to the range of values of each variable at the presence points used to train the model and the range of each variable chosen to represent suitable habitat.
b
National Vegetation Classification—formation or land use classification