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. 2020 Oct 16;2(42):815–819. doi: 10.46234/ccdcw2020.223

Table 1. Environmental variables used in MaxEnt model.

Variable Classification Variable Name Definition Units Variable Type Source
Bioclimatic Data
BIO_01 Annual mean temperature ℃ continuous https://www.worldclim.org/data/worldclim21.html
BIO_02 Mean diurnal range ℃
BIO_03 Isothermality −
BIO_04 Standard deviation of temperature seasonality −
BIO_05 Max temperature of warmest month ℃
BIO_06 Min temperature of coldest month ℃
BIO_07 Temperature annual range ℃
BIO_08 Mean temperature of wettest quarter ℃
BIO_09 Mean temperature of driest quarter ℃
BIO_10 Mean temperature of warmest quarter ℃
BIO_11 Mean temperature of coldest quarter ℃
BIO_12 Annual precipitation mm
BIO_13 Precipitation of wettest month mm
BIO_14 Precipitation of driest month mm
BIO_15 Coefficient of variation of precipitation seasonality −
BIO_16 Precipitation of wettest quarter mm
BIO_17 Precipitation of driest quarter mm
BIO_18 Precipitation of warmest quarter mm
BIO_19 Precipitation of coldest quarter mm
Geographical Data
LU Land use − categorical http://www.resdc.cn/
LF Landform − categorical
NDVI Annual normalized difference vegetation index − continuous
VEG Vegetation − categorical
ELV Elevation m continuous https://www.worldclim.org/data/worldclim21.html