Speciation, hybridization, lineage persistence, and conservation of North American musk turtles: (genus sternotherus)

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dc.contributor Reed, Laura K.
dc.contributor Lopez-Bautista, Juan M.
dc.contributor Glenn, Travis C.
dc.contributor.advisor Rissler, Leslie J.
dc.contributor.advisor Lozier, Jeffrey D.
dc.contributor.author Scott, Peter Alexander
dc.date.accessioned 2017-04-26T14:27:27Z
dc.date.available 2017-04-26T14:27:27Z
dc.date.issued 2016
dc.identifier.other u0015_0000001_0002487
dc.identifier.other Scott_alatus_0004D_12929
dc.identifier.uri http://ir.ua.edu/handle/123456789/3131
dc.description Electronic Thesis or Dissertation
dc.description.abstract Species are the most fundamental units of biodiversity, and importantly the only unit of biodiversity that can be explicitly evolutionarily defined. Thus, understanding biodiversity on all levels (e.g. ecosystem, community, population, or evolutionary potential) is dependent upon an accurate understanding of species level diversity and the ecological and evolutionary processes responsible for shaping or maintaining them. This dissertation aims to expand our understanding of population and species level diversity and mechanisms underlying formation of this diversity in the North American turtle genus: Sternotherus. Firstly, I quantified population level extinction and introgression for the federally threatened flattened musk turtle (S. depressus). This species has undergone rapid population-level extirpation and potentially recent introgression with a sister species, both of which have important conservation implications for this species. Second, genomic data and robust coalescent and demographic analyses are used to infer species limits and relationships for the genus. This work uncovers multiple cryptic species within the genus while using a novel framework to resolve species level relationships in a rapid radiation with post-diversification introgression. Lastly, a genomic hybrid zone between two species of Sternotherus is characterized, and within the context of anthropogenically mediated genomic introgression, this helps to expand our understanding of the genomic mechanisms underlying maintenance of lineage boundaries between species. The combinations of approaches conducted here, rooted in empirical ecology, systematics, and populations genetics, transform our understanding of biodiversity in Sternotherus and show promise for similar methods to be successfully used across a wide variety of organisms.
dc.format.extent 161 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Evolution & development
dc.subject.other Systematic biology
dc.subject.other Conservation biology
dc.title Speciation, hybridization, lineage persistence, and conservation of North American musk turtles: (genus sternotherus)
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Dept. of Biological Sciences
etdms.degree.discipline Biological Sciences
etdms.degree.grantor The University of Alabama
etdms.degree.level doctoral
etdms.degree.name Ph.D.

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