Potential for microbial degradation of terrestrial dissolved organic carbon in coastal Hudson Bay

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dc.contributor.authorKazmiruk, Zakhar
dc.contributor.examiningcommitteePapakyriakou, Tim (Environment and Geography) Gueguen ,Céline (Chemistry, Trent University)en_US
dc.contributor.supervisorKuzyk, Zou Zou (Environment & Geography)en_US
dc.date.accessioned2019-01-08T15:51:33Z
dc.date.available2019-01-08T15:51:33Z
dc.date.issued2018-12-31en_US
dc.date.submitted2019-01-03T16:23:44Zen
dc.degree.disciplineEnvironment and Geographyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe fate of terrestrial organic carbon (OC) in the global ocean is largely unknown and it is speculated to be rapidly degraded in the coastal waters. Arctic marine waters, especially Hudson Bay, have a disproportionally large terrestrial dissolved organic carbon (tDOC) input compared to the global ocean, which is increasing due to climate change. The findings of these first studies of microbial degradation of terrestrial OC in Hudson Bay have revealed the presence of high Apparent Oxygen Utilization in a subsurface, winter-ventilated water mass that cannot be explained by respiration of settling marine-produced OC as currently understood. I hypothesize that tDOC deposited into coastal waters ultimately gets degraded (consuming oxygen) under the ice cover. The findings from incubation experiments that 20-50% of the tDOC deposited into Hudson Bay by southern rivers in late winter is biodegradable within a few weeks are consistent with this hypothesis.en_US
dc.description.noteFebruary 2019en_US
dc.identifier.urihttp://hdl.handle.net/1993/33646
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectCoastal oceanen_US
dc.subjectDissolved organic carbonen_US
dc.subjectArctic Oceanen_US
dc.subjectMicrobial degradationen_US
dc.subjectApparent Oxygen Utilizationen_US
dc.subjectIncubation experimenten_US
dc.subjectHudson Bayen_US
dc.subjectNelson Riveren_US
dc.subjectHayes Riveren_US
dc.subjectGreat Whale Riveren_US
dc.subjectTerrestrialen_US
dc.titlePotential for microbial degradation of terrestrial dissolved organic carbon in coastal Hudson Bayen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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