Correlation matrix of environmental variables and species traits in the analysis.

Abbreviations: BMR �C log10 basal metabolic rate; M - log10 body mass; Abs. latitude (not analyzed further) �C absolute latitude; NPP avg �C average annual net primary productivity (t Carbon ha?1 y?1); NPP max �C total NPP of most productive three months; Prec avg �C avg monthly precipitation (mm); Temp avg �C average annual temperature (��C); Temp max �C average temperature of the warmest three months (��C); PET avg �C average potential evapotranspiration (mm); Aridity �C Prec avg/PET avg; Temp range �C absolute difference between average January and July temperature (��C); Prec range �C difference between average maximum and minimum monthly precipitation (mm); Prec CV �C coefficient of variation of monthly precipitation across 30 years (%). All absolute values of r >0.38 are significant at p