Climate change-related shifts in species interactions and diet in an Arctic marine ecosystem

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dc.contributor.authorOgloff, Wesley
dc.contributor.authorOgloff, Wesley
dc.contributor.examiningcommitteeFerguson, Steve (Biological Sciences)en_US
dc.contributor.examiningcommitteeHedges, Kevin (Fisheries and Oceans Canada)en_US
dc.contributor.guestmembersYurkowski, David (University of Manitoba)en_US
dc.contributor.supervisorDavoren, Gail (Biological Sciences)en_US
dc.date.accessioned2018-09-14T21:57:14Z
dc.date.available2018-09-14T21:57:14Z
dc.date.issued2018en_US
dc.date.submitted2018-08-30T21:38:46Zen
dc.degree.disciplineBiological Sciencesen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractWith climate change, temperate species are becoming increasingly able to occupy Arctic regions that were previously unsuitable. In Cumberland Sound, Nunavut, the forage fish capelin has become abundant in recent decades, as has the seasonally-migrant harp seal during the summer months. Coincident have been reported decreases to resident ringed seal numbers. While capelin foraging is well studied in other regions, it is less so in Cumberland Sound. In addition, no research has yet examined whether harp seals may act as competitors to Cumberland Sound ringed seals. The objectives of this thesis were to (1) quantify capelin diet and isotopic niche characteristics, and (2) examine ringed and harp seal diet and isotopic niches and determine the degree of overlap. Results from this thesis have provided insight into trophic interactions within the Cumberland Sound food web and provide a baseline for future studies examining the impacts of climate change in Arctic ecosystems.en_US
dc.description.noteOctober 2018en_US
dc.identifier.urihttp://hdl.handle.net/1993/33405
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectRinged sealen_US
dc.subjectHarp sealen_US
dc.subjectCapelinen_US
dc.subjectForaging ecologyen_US
dc.subjectArcticen_US
dc.subjectDieten_US
dc.subjectStable isotopesen_US
dc.subjectStomach contentsen_US
dc.titleClimate change-related shifts in species interactions and diet in an Arctic marine ecosystemen_US
dc.typemaster thesisen_US
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