DNA barcoding of echinoderms: Species diversity and patterns of molecular evolution

dc.contributor.advisorHebert, Paul D.N.
dc.contributor.authorCorstorphine, Erin A.
dc.date.accessioned2020-08-24T15:52:18Z
dc.date.available2020-08-24T15:52:18Z
dc.date.copyright2010
dc.degree.departmentDepartment of Integrative Biologyen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractThis thesis investigates species diversity and patterns of molecular evolution in the phylum Echinodermata. The first chapter tests and confirms the utility of DNA barcoding for species identification in 131 species of echinoderms. The impact of larval development and dispersal on intraspecific divergence is examined for trans-oceanic and putative cryptic species. The second chapter investigates the association between rates of molecular evolution and developmental mode by employing phylogenetically independent comparisons between species with contrasting modes of larval development (e.g., planktotrophy vs. maternal brood-protection). The results show that species with nonpelagic development have accelerated rates of evolution when compared to those with pelagic development. However, further investigation is required to determine the factors responsible for this trend. These results suggest that reproductive mode is an important factor in the establishment and maintenance of patterns and rates of genetic divergence in echinoderms.en_US
dc.identifier.urihttps://hdl.handle.net/10214/20441
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectspecies diversityen_US
dc.subjectmolecular evolutionen_US
dc.subjectphylum Echinodermataen_US
dc.subjectDNA barcodingen_US
dc.subjectspecies identificationen_US
dc.subjectechinodermsen_US
dc.subjectlarval developmenten_US
dc.subjectdispersalen_US
dc.subjectintraspecific divergenceen_US
dc.subjecttrans-oceanicen_US
dc.subjectputative cryptic speciesen_US
dc.subjectnonpelagic developmenten_US
dc.subjectpelagic developmenten_US
dc.subjectreproductive modeen_US
dc.titleDNA barcoding of echinoderms: Species diversity and patterns of molecular evolutionen_US
dc.typeThesisen_US

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