FIGURE 5.

Distance-based redundancy analysis (db-RDA) sample (A) and exploration type (B) ordinations based on ectomycorrhizal fungal exploration type on interior Douglas-fir across five regions in western Canada. The ectomycorrhizal fungal exploration types are sized according to their relative abundance. MAP, mean annual precipitation; MAT, mean annual temperature; CN, soil carbon-to-nitrogen ratio. To aid comparison, predictor variables were standardized (z-scores) prior to analysis and are therefore unitless. Contact-, short- and medium-distance smooth exploration types are hydrophylic while medium-distance fringe and long-distance exploration types are hydrophobic.