Environmental variation between sympatry and allopatry.

<p>Box-and-whisker plots showing environmental space occupied by predicted allopatric populations of <i>S. bombifrons</i> (abbreviated “<i>Sb</i> allopatry”), predicted allopatric populations of <i>S. multiplicata</i> (abbreviated “<i>Sm</i> allopatry”), and predicted sympatric populations of both species for each environmental variable used in the Maxent models. Non-overlapping notches are roughly equivalent to 95% confidence intervals, and therefore provide strong evidence that the medians differ <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032748#pone.0032748-R1" target="_blank">[48]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032748#pone.0032748-Chambers1" target="_blank">[58]</a>. An “*” above the sympatry box indicates variables for which sympatric sites are significantly hotter or drier than both allopatric sites.