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035 a| (Sirsi) o148083412;

035 a| (OCoLC)148083412;

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049 a| EREE;

050 4 a| QL668.C274b| B4 2004;

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

245 10 a| Phylogenetics and population status of coastal plain dusky salamanders (Amphibia: Caudata: Plethodontidae) /c| by David A. Beamer.;

264 0 c| 2004.;

300 a| vi, 94 leaves :b| illustrations, maps (some color) ;c| 28 cm;

336 a| textb| txt2| rdacontent;

337 a| unmediatedb| n2| rdamedia;

338 a| volumeb| nc2| rdacarrier;

502 b| M.S.c| East Carolina Universityd| 2004;

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

500 a| Advisor: Trip Lamb;

520 3 a| Members of the plethodontid salamander genus Desmognathus are morphologically conservative and therefore have been traditionally problematic for herpetologists working on the systematics of this taxon. Despite recent molecular-based efforts to elucidate phylogenetic relationships within the genus, little attention has been given to coastal populations. Desmognathus is widespread throughout both the Gulf and Atlantic coastal plains. Historically, three species - D. auriculatus, D. conanti, and D. apalachicolae - have been recognized. However, equivocal species assignments (i.e., D. auriculatus vs. D. conanti) have prevailed for several populations over a broad geographic area. I sampled 31 populations throughout the coastal plain and sequenced a 411 bp segment of the mitochondrial COI gene to clarify the systematic status of coastal plain Desmognathus. Observed levels of sequences divergence suggest more than three species occur in the coastal plain. I documented within drainage sympatry of two undescribed species from the Tar River, both of which were historically considered to be D. auriculatus. The sequence data also suggest that the coastal plain has probably experienced multiple invasions of ancestral montane Desmognathus. Before the onset of my project, anecdotal observations indicated that some local populations of Desmognathus were declining. However, results from my survey indicate a pervasive decline in Desmognathus throughout the coastal plain. Finally, I present preliminary life history data that suggest coastal populations of Desmognathus display plasticity in duration of the aquatic larval period.;

504 a| Includes bibliographical references (leaves 87-94).;

650 0 a| Dusky salamandersz| North Carolina.=| ^A888075;

650 0 a| Dusky salamandersx| Geographical distribution.=| ^A888075;

650 7 a| Dusky salamanders.2| fast0| (OCoLC)fst00899626;

651 7 a| North Carolina.2| fast0| (OCoLC)fst01204304?| UNAUTHORIZED;

655 7 a| Academic theses.2| fast0| (OCoLC)fst01726453;

655 7 a| Academic theses.2| lcgft;

655 7 a| Thèses et écrits académiques.2| rvmgf0| (CaQQLa)RVMGF-000001173;

655 2 a| Academic Dissertation.0| (DNLM)D019478?| UNAUTHORIZED;

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

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

856 41 z| Access via ScholarShipu| http://hdl.handle.net/10342/11848;

949 a| Click on web addressw| asish| joyner101;

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Phylogenetics and population status of coastal plain dusky salamanders (Amphibia: Caudata: Plethodontidae) / 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
Production	2004.
Description	vi, 94 leaves : illustrations, maps (some color) ; 28 cm
Supplemental Content	Access via ScholarShip
Subjects	Dusky salamanders--North Carolina. Dusky salamanders--Geographical distribution.

Summary	Members of the plethodontid salamander genus Desmognathus are morphologically conservative and therefore have been traditionally problematic for herpetologists working on the systematics of this taxon. Despite recent molecular-based efforts to elucidate phylogenetic relationships within the genus, little attention has been given to coastal populations. Desmognathus is widespread throughout both the Gulf and Atlantic coastal plains. Historically, three species - D. auriculatus, D. conanti, and D. apalachicolae - have been recognized. However, equivocal species assignments (i.e., D. auriculatus vs. D. conanti) have prevailed for several populations over a broad geographic area. I sampled 31 populations throughout the coastal plain and sequenced a 411 bp segment of the mitochondrial COI gene to clarify the systematic status of coastal plain Desmognathus. Observed levels of sequences divergence suggest more than three species occur in the coastal plain. I documented within drainage sympatry of two undescribed species from the Tar River, both of which were historically considered to be D. auriculatus. The sequence data also suggest that the coastal plain has probably experienced multiple invasions of ancestral montane Desmognathus. Before the onset of my project, anecdotal observations indicated that some local populations of Desmognathus were declining. However, results from my survey indicate a pervasive decline in Desmognathus throughout the coastal plain. Finally, I present preliminary life history data that suggest coastal populations of Desmognathus display plasticity in duration of the aquatic larval period.
General note	Presented to the faculty of the Department of Biology.
General note	Advisor: Trip Lamb
Dissertation note	M.S. East Carolina University 2004
Bibliography note	Includes bibliographical references (leaves 87-94).
Genre/form	Academic theses.
Genre/form	Academic theses.
Genre/form	Thèses et écrits académiques.

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Phylogenetics and population status of coastal plain dusky salamanders (Amphibia: Caudata: Plethodontidae) / by David A. Beamer.

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