Figures

Figure 1. Map of species richness with locations of example sites from the xeric and Taiga ecoregions of Ricketts and others (1999).
Figure 2. Maps of North America illustrating mean temperature of coldest months and mean temperature of warmest months in degrees Celsius (°C).
Figure 3. Maps of North America illustrating mean annual temperature in degrees Celsius (°C) and growing degree days on a 5°C base.
Figure 4. Maps of North America illustrating mean January precipitation and mean July precipitation in millimeters (mm).
Figure 5. Maps of North America illustrating mean annual precipitation in millimeters (mm) and moisture index expressing ratio of actual to potential evapotranspiration (evap.).
Figure 6. Examples with xeric and Taiga sites showing graphical representations of mean temperature of coldest months in degrees Celsius (°C) of species in the assemblage and the curve with the sum of weights. See figure 1 for locations of xeric and Taiga ecoregions. Red and blue areas show temperature ranges where species live today. Obs, observed; MCR_un, unweighted Mutual Climatic Range; MCR_wt, weighted Mutual Climatic Range.