| lineage diversification and historical demography of a sky island salamander, plethodon ouachitae, from the interior highlands. | sky islands provide ideal opportunities for understanding how climatic changes associated with pleistocene glacial cycles influenced species distributions, genetic diversification, and demography. the salamander plethodon ouachitae is largely restricted to high-elevation, mesic forest on six major mountains in the ouachita mountains. because these mountains are separated by more xeric, low-elevation valleys, the salamanders appear to be isolated on sky islands where gene flow among populations o ... | 2008 | 19121000 |