Pearson correlation coefficients between each explanatory variable and both beta-diversity measures for the complete set of world data (Total) and the regional cells above (>37th) and below (th) the 37th parallel.

Bold values are statistically significant (pPRES = Mean annual temperature for the present; TPAST = Mean annual temperature for the LGM period; TDIF = Temperature difference between the present and LGM times; PET = Current annual potential evapotranspiration; PREC = Current annual precipitation; and ARANGE = Altitudinal variability.