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Appendix S1. Multi-scale dynamics and processes relevant to persistence of Ochotona princeps.

Appendix S2. Comparison of variable weights (wj), average Akaike weight per model, number of models in which the variable had positive and negative coefficients, and coefficient of variation (CV) across the fitted coefficients of the variable for each predictor, for each of three periods. Within each period, variables are listed in order of decreasing weight per model. The left columns include the variables used in Beever et al. (2003), whereas the right columns replace the maximum elevation variable with a novel variable that indexes the latitude-adjusted maximum elevation of habitat available at each site. The climate-related predictors appear in bold font, and the two versions of maximum elevation appear in bold italics. Note consistency of the sign of regression coefficients for all predictors except distance to road. The null model was plausible for analysis of Recent data that used the original variable describing maximum upslope refuge (MaxElev; see **). Column headings are as in Table 1.

Appendix S3. Classifications of habitat area occupiable by O. princeps at study sites across the hydrographic Great Basin, at the mountain-range scale.

Appendix S4. Mean temperature during June-August across the hydrological Great Basin (western USA), from 1945–2010, illustrating that most summers after 1990s sampling through the end of 2000s sampling (i.e., during 2000–2008) have been warmer than those of the previous ~50 yrs. Trend is depicted with both a linear regression and a locally weighted regression (curved line).

Appendix S5. Characteristics of sites in the hydrological Great Basin, western USA, used in relevant analyses, 1994–2008.

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