Pacific salmon in the Canadian Arctic: indicators of change

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dc.contributor.authorDunmall, Karen
dc.contributor.examiningcommitteeAnderson, Gary (Biological Sciences) Halden, Norman (Geological Sciences) Tonn, William (Biological Sciences, University of Alberta)en_US
dc.contributor.guestmembersZimmerman, Christian (Alaska Science Center, U.S. Geological Survey)en_US
dc.contributor.supervisorReist, James (Biological Sciences) Docker, Margaret (Biological Sciences)en_US
dc.date.accessioned2018-01-18T15:14:05Z
dc.date.available2018-01-18T15:14:05Z
dc.date.issued2013en_US
dc.date.issued2016en_US
dc.degree.disciplineBiological Sciencesen_US
dc.degree.levelDoctor of Philosophy (Ph.D.)en_US
dc.description.abstractThe Arctic is rapidly changing. Warming temperatures are both facilitating new opportunities and threatening biodiversity. Despite a global effort to conserve biodiversity, and the recent acceleration of related conservation initiatives in Canada, species are already responding to a changing Arctic. However, our abilities to assess these changes, including shifting distributions and their impacts, are limited. Therefore, innovative approaches are necessary to focus the vastness of the Arctic to key habitats, the breadth of species diversity to key indicators of change, and to integrate knowledge in order to predict and manage a future Arctic. In this thesis, I establish Pacific salmon Oncorhynchus spp. as indicators of ecosystem-level change in the Canadian Arctic. More broadly, however, I have developed tools and strategies to help assess the impending biodiversity crisis in the Arctic. I developed a novel model to successfully apply citizen science to monitor rapidly shifting biodiversity in the Canadian Arctic and I extend the breadth of community-based monitoring across species and their habitats to encompass broad-scale areas and fine-scale assessments. By aligning thermal tolerances with thermal regimes at critical groundwater spring oases, I developed a novel model that predicts watersheds vulnerable to colonizations by salmon, and identifies the associated risk of competition with native char. I also use genetic tools to establish that chum salmon O. keta colonized the upper Mackenzie River at deglaciation, and that vagrants are currently accessing the Mackenzie River via coastal pathways. Together, I advance science regarding: 1) the application of citizen science to monitor biodiversity shifts in the Arctic; 2) predictions of distributional shifts to extreme environments; and 3) assessing the viability of the Arctic freshwater and marine environments as fish habitat over the past several thousand years. By integrating the subsistence way-of-life with scientific approaches, we can better manage the development opportunities and predict the conservation impacts in a future Arctic.en_US
dc.description.noteFebruary 2018en_US
dc.identifier.citationDunmall, K.M., Reist, J.D., Carmack, E.C., Babaluk, J.A., Heide-Jørgensen, M.P., and Docker, M.F. 2013. Pacific salmon in the Arctic: Harbingers of recent great changes. In Responses of Arctic Marine Ecosystems to Climate Change. Edited by F.J. Mueter, D.M.S. Dickson, H.P. Huntington, J.R. Irvine, E.A. Logerwell, S.A. MacLean, L.T. Quakenbush, and C. Rosa. Alaska Sea Grant, University of Alaska Fairbanks. pp. 141-163. doi: 10.4027/ramecc.2013.07en_US
dc.identifier.citationDunmall, K.D., Mochnacz, N.J., Zimmerman, C.E., Lean, C., and Reist, J.D. 2016. Using thermal limits to assess establishment of fish dispersing to high elevation and high latitude watersheds. Can. J. Fish. Aquat. Sci. 73(12): 1750-1758. doi: 10.1139/cjfas-2016-0051en_US
dc.identifier.urihttp://hdl.handle.net/1993/32856
dc.language.isoengen_US
dc.publisherAlaska Sea Grant, University of Alaska Fairbanks.en_US
dc.publisherCanadian Journal of Fisheries and Aquatic Sciencesen_US
dc.rightsopen accessen_US
dc.subjectArcticen_US
dc.subjectPacific salmonen_US
dc.subjectClimate changeen_US
dc.subjectBiodiversityen_US
dc.subjectDistributional shiftsen_US
dc.subjectBiologyen_US
dc.subjectGeneticsen_US
dc.titlePacific salmon in the Canadian Arctic: indicators of changeen_US
dc.typedoctoral thesisen_US
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