Geographic Protein Variation and Speciation in Salamanders of the Plethodon Jordani and Plethodon Glutinosus Complexes in the Southern Appalachian Mountains with the Description of Four New Species

Highton, Richard; Peabody, Robert B.

doi:10.1007/978-1-4615-4255-1_3

Cited by 114 publications

(201 citation statements)

References 45 publications

Supporting

Mentioning

186

Contrasting

Unclassified

Order By: Relevance

“…The findings presented here have considerable potential to explain the patterns observed in other hybrid zones among Plethodon in the southern Appalachians. A rapid radiation leading to high species richness (Highton 1995;Wiens et al 2006) has resulted in myriad hybrid zones among Plethodon in the southeastern United States (Highton & Peabody 2000). Given the mountainous terrain encompassing the ranges of many of these species, the seemingly narrow climatic specificity of many high elevation Plethodon species (Kozak & Wiens 2006, and past oscillations in climate, we may reasonably expect many of these hybrid zones to be dynamic.…”

Section: Discussionmentioning

confidence: 99%

“…These included eight localities in the Great Smoky Mountains (the range of P. jordani), six from the Balsam Mountains (within the range of P. metcalfi) and six from low elevations in the Great Smoky Mountains (within the range of P. teyahalee). It should be noted that Highton & Peabody (2000) and uncovered two genetically divergent lineages of P. metcalfi corresponding to the Balsam and Blue Ridge Mountains. As only populations from the Balsam Mountains are known to hybridize with P. jordani, only these populations of P. metcalfi were sampled.…”

Section: Samplingmentioning

confidence: 99%

See 1 more Smart Citation

Patterns of differential introgression in a salamander hybrid zone: inferences from genetic data and ecological niche modelling

et al. 2010

View full text Add to dashboard Cite

Hybrid zones have yielded considerable insight into many evolutionary processes, including speciation and the maintenance of species boundaries. Presented here are analyses from a hybrid zone that occurs among three salamanders -Plethodon jordani, Plethodon metcalfi and Plethodon teyahalee -from the southern Appalachian Mountains. Using a novel statistical approach for analysis of non-clinal, multispecies hybrid zones, we examined spatial patterns of variation at four markers: single-nucleotide polymorphisms (SNPs) located in the mtDNA ND2 gene and the nuclear DNA ILF3 gene, and the morphological markers of red cheek pigmentation and white flecks. Concordance of the ILF3 marker and both morphological markers across four transects is observed. In three of the four transects, however, the pattern of mtDNA is discordant from all other markers, with a higher representation of P. metcalfi mtDNA in the northern and lower elevation localities than is expected given the ILF3 marker and morphology. To explore whether climate plays a role in the position of the hybrid zone, we created ecological niche models for P. jordani and P. metcalfi. Modelling results suggest that hybrid zone position is not determined by steep gradients in climatic suitability for either species. Instead, the hybrid zone lies in a climatically is currently studying interactions between the amphibian chytrid fungus and frogs of the eastern United States. K.H.K. is interested in the evolutionary processes of southern Appalachian salamanders, especially as revealed by ecological niche modelling and physiological limits. B.M.F. studies conservation, population genetics, and patterns of hybridization across a variety of salamander taxa. P.K.T.'s research focuses on speciation genetics, as informed by an extensive house mouse hybrid zone in Eastern Europe.Supporting information Additional supporting information may be found in the online version of this article. Table S1 Transects, sites codes, elevation, and latitude and longitude for animals captured in the hybrid zone Table S2 Sites codes, elevation, and latitude and longitude for parental taxa Table S3 Pure parental individuals (Plethodon jordani, P. metcalfi, and P. teyahalee) and marker scores used in panel for marker development Table S4 Samples (arranged by transect) and marker scores for all samples used in analyses Please note: Wiley-Blackwell are not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing material) should be directed to the corresponding author for the article. Author Manuscript homogenous region that is broadly suitable for both P. jordani and P. metcalfi. We discuss various selective (natural selection associated with climate) and behavioural processes (sex-biased dispersal, asymmetric reproductive isolation) that might explain the discordance in the extent to which mtDNA and nuclear DNA and colour-pattern traits have moved across this hybrid zone. HHS Public Access

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Samplingmentioning

confidence: 99%

Patterns of differential introgression in a salamander hybrid zone: inferences from genetic data and ecological niche modelling

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Some of these were not new but raised from synonymy (e.g., Plethodon grobmani, Plethodon cylandraceus), but others were newly named (Plethodon aureolus, Plethodon mississippi; Highton 1989). Well-known taxa such as Plethodon cinereus, Plethodon glutinosus, and Plethodon jordani were subdivided (summarized by Highton and Peabody 2000). Protein studies also contributed to the descriptions of species in other genera including Desmognathus, Eurycea, Nototriton, Pseudoeurcea, Oedipina, and Thorius among others.…”

Section: How Many Species Of Plethodontid Salamanders Shouldmentioning

confidence: 99%

Persistent Plethodontid Themes: Species, Phylogenies, and Biogeography

Wake

2017

Herpetologica

View full text Add to dashboard Cite

“…Constant connectivity is unrealistic because climatic cycles and the shifting ranges of ecological communities should restrict the time available for the evolution and maintenance of ring species. Older species, or those that evolve reproductive isolation slowly, such as salamanders (Highton and Peabody, 2000;Wake, 2006;Tilley et al, 2013), are more likely to form rings that have experienced episodes of fragmentation, isolation, differentiation, then expansion and secondary contact (Wake, 1997).…”

Section: Diagnosing Ring Speciesmentioning

confidence: 99%