The polychaeta of Canada: Exploring diversity and distribution paterns using DNA barcodes

dc.contributor.advisorHebert, P.D.N.
dc.contributor.authorCarr, Christina M. of Integrative Biologyen_US of Guelphen_US of Scienceen_US
dc.description.abstractThis thesis investigates the diversity and distribution of polychaetes from Canadian marine waters employing both morphological (literature reports) and molecular (mtDNA) approaches. Collation of species reports from the literature indicated that nearly 15% of the 1,023 Canadian polychaete species occur in all three of Canada's oceans. In contrast, DNA barcode analysis of these widespread species indicated that most were species complexes. Barcode analysis of 333 provisional polychaete species revealed 40 times more sequence divergence between than within species, and extensive cryptic diversity in 36 morphospecies. Further examination of genetic discontinuities between Pacific and Atlantic-Arctic sister taxa indicated that periodic ice retreats during the Pleistocene enabled multiple migrations of polychaete species across the Bering Strait, ultimately increasing polychaete diversity in Canada. This thesis demonstrates the utility of DNA barcoding as a tool for species identification in polychaetes and for illuminating evolutionary and biogeographic patterns among species.en_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectDNA barcodesen_US
dc.subjectDistribution patternsen_US
dc.subjectCanadian marine watersen_US
dc.titleThe polychaeta of Canada: Exploring diversity and distribution paterns using DNA barcodesen_US


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