| north-facing slopes and elevation shape asymmetric genetic structure in the range-restricted salamander plethodon shenandoah. | species with narrow environmental tolerances are often distributed within fragmented patches of suitable habitat, and dispersal among these subpopulations can be difficult to directly observe. genetic data can help quantify gene flow between localities, which is especially important for vulnerable species with a disjunct range. the shenandoah salamander (plethodon shenandoah) is a federally endangered species known only from three mountaintops in virginia, usa. to reconstruct the evolutionary hi ... | 2019 | 31110664 |
| evidence that climate sets the lower elevation range limit in a high-elevation endemic salamander. | a frequent assumption in ecology is that biotic interactions are more important than abiotic factors in determining lower elevational range limits (i.e., the "warm edge" of a species distribution). however, for species with narrow environmental tolerances, theory suggests the presence of a strong environmental gradient can lead to persistence, even in the presence of competition. the relative importance of biotic and abiotic factors is rarely considered together, although understanding when one ... | 2018 | 30151170 |