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035 a| (Sirsi) o919448049;

035 a| (OCoLC)919448049;

043 a| n-usu--;

049 a| EREE;

090 a| QL668.C274;

100 1 a| Beamer, David A.,e| author.?| UNAUTHORIZED;

245 10 a| Rectifying limitations on species delineation in dusky salamanders :b| lineage detection using an ecoregion-drainage sampling regime /c| by David A. Beamer.;

264 1 a| [Greenville, N.C.] :b| [East Carolina University],c| 2015.;

300 a| 182 pages :b| illustrations (some color), map;

336 a| textb| txt2| rdacontent;

337 a| computerb| c2| rdamedia;

338 a| online resourceb| cr2| rdacarrier;

347 a| text fileb| PDFc| 13.07Mb2| rda;

538 a| System requirements: Adobe Reader.;

538 a| Mode of access: World Wide Web.;

502 b| Ph.D.c| East Carolina Universityd| 2015.;

500 a| Presented to the faculty of the Department of Biology.;

500 a| Advisor: Trip Lamb.;

500 a| Title from PDF t.p. (viewed October 7, 2015).;

520 3 a| The dusky salamanders (Desmognathus) constitute a large, species-rich group, and although a considerable body of literature exists on systematic relationships and adaptive trends, these issues have heretofore been approached in piecemeal fashion. Recent work has revealed Desmognathus to be far more lineage rich than previously imagined and demonstrated just how complex the taxon's evolutionary history has been. These recent advances underscore the need for additional sampling in areas and within lineages that have thus far been sparsely evaluated. I conceived and implemented a sampling regimen involving level IV ecoregion X independent river drainages designed for the comprehensive recovery of all genealogically exclusive lineages within the genus. I sampled over 550 populations across the range-wide distribution of described dusky salamander species and generated mtDNA sequence data for each population. A Bayesian phylogenetic reconstruction of the resulting haplotypes revealed forty-five independent evolutionary lineages, eleven of which have never been included in a comprehensive phylogenetic reconstruction and three of which have not been included in any molecular systematic survey. Although general limitations associated with mtDNA data preclude delineation of new species, I have redefined several species complexes and have also erected new informal species complexes. The dataset assembled here, which contains topotypic samples for all currently recognized species as well as most synonymies, should serve as a robust framework for future efforts to delimit species within Desmognathus.;

504 a| Includes bibliographical references.;

650 0 a| Dusky salamandersz| Southern States.=| ^A888075;

650 0 a| Sampling (Statistics)=| ^A4094;

650 0 a| Bayesian statistical decision theory.=| ^A20878;

650 0 a| Evolution (Biology)z| Southern States.=| ^A273017;

650 0 a| Phylogeny.=| ^A10509;

650 0 a| Speciesz| Southern States.=| ^A26277;

653 a| Biology;

653 a| Coastal plain;

653 a| Desmognathus;

653 a| Ecoregion;

653 a| Mito-nuclear discordance;

653 a| Speciation;

700 1 a| Lamb, Trip,e| degree supervisor.=| ^A1277551;

710 2 a| East Carolina University.b| Department of Biology.=| ^A637467;

856 40 z| Access via ScholarShipu| http://hdl.handle.net/10342/4987;

949 o| jgml;

994 a| C0b| ERE;

596 a| 1 4;

998 a| 3808130;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 3808130-1001l| JNETm| JOYNERr| Ys| Yt| JNE3ETDu| 8/31/2015x| ETDz| JERESOURCE;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 3808130-2001l| HSLELECm| HSLr| Ys| Yt| HEETDu| 8/31/2015x| ETDz| HERESOURCE;

Rectifying limitations on species delineation in dusky salamanders : lineage detection using an ecoregion-drainage sampling regime / by David A. Beamer.

Author/creator	Beamer, David A. author.
Other author	Lamb, Trip, degree supervisor.
Other author	East Carolina University. Department of Biology.
Format	Theses and dissertations
Publication	[Greenville, N.C.] : [East Carolina University], 2015.
Description	182 pages : illustrations (some color), map
Supplemental Content	Access via ScholarShip
Subjects	Dusky salamanders--Southern States. Sampling (Statistics) Bayesian statistical decision theory. Evolution (Biology)--Southern States. Phylogeny. Species--Southern States.

Summary	The dusky salamanders (Desmognathus) constitute a large, species-rich group, and although a considerable body of literature exists on systematic relationships and adaptive trends, these issues have heretofore been approached in piecemeal fashion. Recent work has revealed Desmognathus to be far more lineage rich than previously imagined and demonstrated just how complex the taxon's evolutionary history has been. These recent advances underscore the need for additional sampling in areas and within lineages that have thus far been sparsely evaluated. I conceived and implemented a sampling regimen involving level IV ecoregion X independent river drainages designed for the comprehensive recovery of all genealogically exclusive lineages within the genus. I sampled over 550 populations across the range-wide distribution of described dusky salamander species and generated mtDNA sequence data for each population. A Bayesian phylogenetic reconstruction of the resulting haplotypes revealed forty-five independent evolutionary lineages, eleven of which have never been included in a comprehensive phylogenetic reconstruction and three of which have not been included in any molecular systematic survey. Although general limitations associated with mtDNA data preclude delineation of new species, I have redefined several species complexes and have also erected new informal species complexes. The dataset assembled here, which contains topotypic samples for all currently recognized species as well as most synonymies, should serve as a robust framework for future efforts to delimit species within Desmognathus.
General note	Presented to the faculty of the Department of Biology.
General note	Advisor: Trip Lamb.
General note	Title from PDF t.p. (viewed October 7, 2015).
Dissertation note	Ph.D. East Carolina University 2015.
Bibliography note	Includes bibliographical references.
Technical details	System requirements: Adobe Reader.
Technical details	Mode of access: World Wide Web.

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Rectifying limitations on species delineation in dusky salamanders : lineage detection using an ecoregion-drainage sampling regime / by David A. Beamer.

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