TABLE 1.
Summary statistics of the 11 lake‐level predictor variables used in the Random Forest SDMs to predict Eurasian watermilfoil invasion risk and frequency of occurrence. Longitude and latitude summarize the geographic distribution of the sampled lakes
| Variable name (units) | Mean | SD | Min | Max |
|---|---|---|---|---|
| CDOM_a440 (m−1) | 2.38 | 2.27 | 0 | 15.1 |
| Chlorophyll‐A (µg/L) | 31 | 84 | 0.093 | 2,231 |
| Conductance (µS/cm) | 313 | 215 | 8.53 | 1,750 |
| Water temperature degree days (base 10, °C*days) | 1671 | 225 | 1,078 | 2,465 |
| Lake depth (m) | 10.2 | 9.58 | 0.914 | 141 |
| Lake size (acres) | 759 | 4984 | 8.82 | 128,251 |
| pH | 8.03 | 0.633 | 6.02 | 9.71 |
| Phosphorus (mg/L) | 0.090 | 0.116 | 0.004 | 1.18 |
| Road density (m/ha) | 40.6 | 29.3 | 0 | 211 |
| Secchi depth (m) | 2.35 | 1.48 | 0.167 | 12.9 |
| Stream density (m/ha) | 4.18 | 3.5 | 0 | 21.2 |
| Latitude (DD) | 46.1 | 1.22 | 43.5 | 48.5 |
| Longitude (DD) | −93.9 | 1.21 | −96.7 | −90.1 |