Appendix C. The jackknife test of variable importance for C. splendens and C. virgo in Sweden and Finland.

The jackknife test of variable importance for C. splendens and C. virgo in Sweden and Finland

Appendix E. Figures depicting the top three variables in Maxent environmental niche models for C. splendens and C. virgo across Sweden and Finland.

Figures depicting the top three variables in Maxent environmental niche models for C. splendens and C. virgo across Sweden and Finland

Appendix A. Overview of climate and remote sensing data sets used in this study.

Overview of climate and remote sensing data sets used in this study

Appendix B. Minimum, maximum, mean, and standard deviations for the top three variables in Maxent environmental niche models for C. splendens and C. virgo.

Minimum, maximum, mean, and standard deviations for the top three variables in Maxent environmental niche models for C. splendens and C. virgo

Appendix D. Graphical representation of principal components from the second background test.

Graphical representation of principal components from the second background test

Spatially interpolated predicted 0.1 northern-allele frequency contours for the locus WW1 from the GAM logistic regression geographic model overlaid on elevation background.

<p>The 0.5 isocline represents the center of the cline. The background represents a hill-shade digital elevation model (DEM). The map has a 30 arc-second resolutions and is projected using the Swedish RT 90 0 gon Mercator projection.</p

Parameter estimates for the GAM cline model examining geographical (i.e., latitude, longitude, and their interaction) and altitude variation in the northern-allele frequency for the AFLP marker WW1.

<p>Parameter estimates for the GAM cline model examining geographical (i.e., latitude, longitude, and their interaction) and altitude variation in the northern-allele frequency for the AFLP marker WW1.</p

Parameter estimates for the GAM model examining variation in the northern-allele frequency for the AFLP-WW1, where insignificant terms were removed using stepwise regression evaluating the reduction in deviance and significance.

<p>Final model variables include the mean monthly maximum temperature for May and mean annual potential evapotranspiration (PET).</p

Maps of Scandinavia with backgrounds representing a digital elevation model (DEM) with Sample site locations.

<p>Sample sites within the willow warbler contact zone have square symbols, while those outside triangles. The maps have a 30 arc-second resolutions and is projected using the Swedish RT 90 0 gon Mercator projection.</p