| molecular detection of vertebrates in stream water: a demonstration using rocky mountain tailed frogs and idaho giant salamanders. | stream ecosystems harbor many secretive and imperiled species, and studies of vertebrates in these systems face the challenges of relatively low detection rates and high costs. environmental dna (edna) has recently been confirmed as a sensitive and efficient tool for documenting aquatic vertebrates in wetlands and in a large river and canal system. however, it was unclear whether this tool could be used to detect low-density vertebrates in fast-moving streams where shed cells may travel rapidly ... | 2011 | 21818382 |
| accounting for coalescent stochasticity in testing phylogeographical hypotheses: modelling pleistocene population structure in the idaho giant salamander dicamptodon aterrimus. | several theoretical studies have demonstrated the importance of accounting for coalescent stochasticity in phylogeographical studies, however, there are few empirical examples that do so in the context of explicit hypothesis testing. here, we provide an example from the idaho giant salamander (dicamptodon aterrimus) using 118 mtdna sequences, nearly 2 kb in length. this species is endemic to mesic forests in northern and central idaho, and several a priori hypotheses have been erected based both ... | 2005 | 15643968 |
| testing hypotheses of speciation timing in dicamptodon copei and dicamptodon aterrimus (caudata: dicamptodontidae). | giant salamanders of the genus dicamptodon are members of the mesic forest ecosystem that occurs in the pacific northwest of north america. we estimate the phylogeny of the genus to test several hypotheses concerning speciation and the origin of current species distributions. specifically, we test competing a priori hypotheses of dispersal and vicariance to explain the disjunct inland distribution of the idaho giant salamander (d. aterrimus) and to test the hypothesis of pleistocene speciation o ... | 2005 | 15904859 |
| scale-dependent genetic structure of the idaho giant salamander (dicamptodon aterrimus) in stream networks. | the network architecture of streams and rivers constrains evolutionary, demographic and ecological processes of freshwater organisms. this consistent architecture also makes stream networks useful for testing general models of population genetic structure and the scaling of gene flow. we examined genetic structure and gene flow in the facultatively paedomorphic idaho giant salamander, dicamptodon aterrimus, in stream networks of idaho and montana, usa. we used microsatellite data to test populat ... | 2010 | 20149085 |