| the phylogenetics of desmognathine salamander populations across the southern appalachians. | salamanders in the genus desmognathus (caudata: plethodontidae) are distributed along an aquatic to terrestrial habitat gradient in the southern appalachian mountains. the spatial distribution of species is believed to have formed as aquatic ancestors displaced lineages by competition and predatory interactions into less optimal terrestrial habitats. aquatic and terrestrial species may also display different patterns of genetic diversity due to the differing likelihood of gene flow via aquatic c ... | 2003 | 12695085 |