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Cryptic Genetic Introgression into an Appalachian Sky Island Population of Black-capped Chickadees (Poecile atricapillus)

dc.contributor.advisorVia, Saraen_US
dc.contributor.advisorBraun, Michael Jen_US
dc.contributor.authorDavidson, Brian Scotten_US
dc.date.accessioned2011-10-08T06:28:35Z
dc.date.available2011-10-08T06:28:35Z
dc.date.issued2011en_US
dc.identifier.urihttp://hdl.handle.net/1903/12055
dc.description.abstractBlack-capped chickadees (Poecile atricapillus) hybridize with Carolina chickadees (P. carolinensis) along the species' contact zone across the eastern United States and in the northern Appalachian Mountains. The Great Smoky Mountains harbor the last large breeding population of atricapillus in the southern Appalachians, isolated from the species main range by nearly 200 km. This population is believed to be reproductively isolated from local carolinensis due to a behaviorally-mediated elevational range gap during the breeding season, which may function as an incipient speciation mechanism. I characterized this population genetically, using hundreds of AFLP loci spread throughout the genome as well as cytochrome-b sequence data from the mitochondrial DNA. The Great Smoky Mountain population of atricapillus has experienced genetic introgression from carolinensis, but at a much lower level than other populations near the northern hybrid zone. This population is also differentiated from northern conspecifics, likely due to historically reduced gene flow.en_US
dc.titleCryptic Genetic Introgression into an Appalachian Sky Island Population of Black-capped Chickadees (Poecile atricapillus)en_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentBiologyen_US
dc.subject.pqcontrolledBiologyen_US
dc.subject.pqcontrolledEcologyen_US
dc.subject.pqcontrolledGeneticsen_US
dc.subject.pquncontrolledAdmixtureen_US
dc.subject.pquncontrolledAvesen_US
dc.subject.pquncontrolledHybridizationen_US
dc.subject.pquncontrolledHybrid Zoneen_US
dc.subject.pquncontrolledIntrogressionen_US
dc.subject.pquncontrolledSpeciationen_US


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