Table 2 Variables used as predictors in random forest models
Category | Variable | Description |
|---|---|---|
Climate | Bio2 | Mean diurnal range (Mean of monthly (max temp - min temp)) |
Bio6 | Minimum temperature of coldest month | |
Bio8 | Mean temperature of wettest quarter | |
Bio15 | Precipitation seasonality (coefficient of variation) | |
Bio16 | Precipitation of wettest quarter | |
Bio18 | Precipitation of warmest quarter | |
Landscape | Landsc. cond. | Landscape condition |
Prop. forest | Forest area density | |
Landscape soil | DI | Soil drainage index |
PI | Soil productivity index | |
Local soil | Bedrock depth | Depth to bedrock (cm |
Pct. clay | Percent clay (< 0.002 mm size) | |
Pct. org. Matt. | Organic matter content (% by weight) | |
Pct. sand | Percent sand (0.05–2.0 mm size) | |
Pct. silt | Percent silt (0.02–0.05 mm size) | |
pH | Soil pH | |
Sieve 10 | Percent soil passing sieve No. 10 (coarse) | |
Topographic | East | Easting: sin(aspect) |
Elevation | Elevation | |
North | Northing: cos(aspect) | |
Slope | Slope | |
TPI | Topographic Position Index |