Variability of fish production : nutrients as chemical drivers across a diverse geographic range

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dc.contributor.authorGood, Caitlin
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorRasmussen, Joseph B.
dc.date.accessioned2014-08-19T16:24:44Z
dc.date.available2014-08-19T16:24:44Z
dc.date.issued2013
dc.degree.levelMastersen_US
dc.degree.levelMasters
dc.descriptionxi, 114 leaves : maps ; 29 cmen_US
dc.description.abstractTotal phosphorus (TP) is an essential nutrient established as a driver of primary productivity that we predict plays a large role in the fish biomass in rivers, lakes and reservoirs. Watershed catchment geology and anthropogenic modification to river flow including hydropower influence nutrient variability in rivers. The relationship between nutrient variation and fish biomass was compared on a local-scale between two geological distinct mountain watersheds in southeastern BC, providing an opportunity to examine smaller-scale ecosystem response to nutrient availability. Nutrient regimes were also characterised in rivers regulated by hydropower and reference rivers across Canada to assess water quality trends and expected variability in fish biomass across a broad geographic scale. Local scale aquatic assessment is useful for identifying trends in ecosystem response within a watershed, whereas regional assessments are at a scale that is more applicable for management. Using TP and fish biomass relationships from a meta-analysis of literature, we developed regionally specific nutrient-based fish models. Establishing baseline nutrient regimes and developing models to estimate expected fish biomass specific to regional fish diversity, provides a useful predictive tool for initiating mitigation and compensation for rivers affected by hydropower.en_US
dc.identifier.urihttps://hdl.handle.net/10133/3483
dc.language.isoen_CAen_US
dc.proquestyesNoen_US
dc.publisherLethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, c2013en_US
dc.publisher.departmentDepartment of Biological Sciencesen_US
dc.publisher.facultyArts and Scienceen_US
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en_US
dc.subjectFish populations -- British Columbiaen_US
dc.subjectFishes -- Effect of water quality on -- British Columbiaen_US
dc.subjectFishes -- Nutritionen_US
dc.subjectRivers -- British Columbiaen_US
dc.subjectStream ecology -- British Columbiaen_US
dc.subjectWater quality -- British Columbiaen_US
dc.subjectWatersheds -- British Columbiaen_US
dc.subjectWatershed management -- British Columbiaen_US
dc.subjectDissertations, Academicen_US
dc.titleVariability of fish production : nutrients as chemical drivers across a diverse geographic rangeen_US
dc.typeThesisen_US
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