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Research Article

Table 2

Summary of the environmental variables downloaded.

Environmental variable layers Signification Units Resolution
Reference
Spatial (km) Temporal
Altitude Elevation above sea level m ~1 × 1 WorldClima
BIO1 Annual mean temperature °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO2 Mean diurnal range (mean of monthly (max temp – min temp)) °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO3 Isothermality (BIO2/BIO7) (× 100) % ~1 × 1 Monthly, 1950–2000 WorldClim
BIO4 Temperature seasonality (standard deviation × 100) % ~1 × 1 Monthly, 1950–2000 WorldClim
BIO5 Max temperature of warmest month °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO6 Min temperature of coldest month °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO7 Temperature annual range (BIO5–BIO6) °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO8 Mean temperature of wettest quarter °C ~1 × 1 km Monthly, 1950–2000 WorldClim
BIO9 Mean temperature of driest quarter °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO10 Mean temperature of warmest quarter °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO11 Mean temperature of coldest quarter °C ~1 × 1 Monthly, 1950–2000 WorldClim
BIO12 Annual precipitation mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO13 Precipitation of wettest month mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO14 Precipitation of driest month mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO15 Precipitation seasonality (coefficient of variation) % ~1 × 1 Monthly, 1950–2000 WorldClim
BIO16 Precipitation of wettest quarter mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO17 Precipitation of driest quarter mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO18 Precipitation of warmest quarter mm ~1 × 1 Monthly, 1950–2000 WorldClim
BIO19 Precipitation of coldest quarter mm ~1 × 1 Monthly, 1950–2000 WorldClim

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