Table 1 The most important environmental variables used in modeling
variables | |||
|---|---|---|---|
Code/Unit Bioclimatic variable | Code/Unit Topographic variable | ||
Bio1°C | Annual mean temperature | Aalt/m | Elevation |
Bio2°C | Mean diurnal range (max. Temp – min. Temp) | Slope/% | Slope |
Bio3°C | Isothermality (Bio2/Bio7)×100 | Aspect (radian) | Aspect |
Bio4°C | Temperature seasonality (SD × 100) | Solar/ kJ m-2 day-1 | Solar radiation |
Bio5°C | Max temperature of warmest month | Code/Unit Edaphic variable | |
Bio6°C | Min temperature of coldest month | Depth /cm | Depth |
Bio7°C | Temperature annual range (Bio5-Bio6) Bio7 (°C) | Depth.to.bedrock /cm | Depth to bedrock |
Bio8°C | Mean temperature of wettest quarter | Cation.exchange.capacity /cmol/km | Cation exchange capacity |
Bio9°C | Mean temperature of driest quarter Bio9 (°C) | Bulk density kg/dm3 | Topsoil Bulk density |
Bio10°C | Mean temperature of warmest quarter | Soil | Soil |
bio11°C | Mean temperature of coldest quarter | Clay.content /% | Clay content |
Bio12mm | Annual precipitation | Silt.content % | Silt content |
bio13mm | Precipitation of wettest month | Sand.content % | Sand content |
Bio14mm | Precipitation of driest month | Soil.organic.carbon.content % | Topsoil organic carbon content |
Bio15mm | Precipitation seasonality | Coarse.fragments / cm3/dm3 | Volumetric fraction of coarse fragments |
Bio16mm | Precipitation of wettest quarter | Geology | Geology |
Bio17mm | Precipitation of driest quarter | Land | Land |
Bio18mm | Precipitation of warmest quarter | Land use | Land use |
Bio19mm | Precipitation of coldest quarter | PH.index | PH.index |