Browsing Theses by Supervisor "Hall, Roland"
Now showing items 1-6 of 6
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Application of artificial substrate samplers to assess enrichment of metals of concern by river floodwaters to lakes across the Peace-Athabasca Delta
(University of Waterloo, 2021-05-19)Potential for downstream delivery of contaminants via Athabasca River floodwaters to lakes of the Peace-Athabasca Delta (PAD), northeastern Alberta (58.6°N, 111.8°W), has raised local to international concern. Prior ... -
Assessing relations among multiple environmental gradients for shallow lakes in Old Crow Flats, Yukon, using hydrological, limnological and community-collaborative research approaches
(University of Waterloo, 2018-01-09)Shallow freshwater ecosystems are undergoing marked hydrological changes associated with a warming Arctic, which causes concern for remote northern communities that access these regions to maintain their traditional ... -
Developing pre-industrial baselines from floodplain lake sediment cores to quantify the extent of metals pollution within the Alberta Oil Sands Region
(University of Waterloo, 2018-11-28)Oil sands mining operations began in 1967, but the onset of a monitoring program to assess water and sediment quality in the Athabasca River watershed began 30 years later. Consequently, no knowledge of pre-industrial, ... -
Environmental controls of sediment mercury accumulation in a large, glacially-fed lake
(University of Waterloo, 2017-07-19)Mercury is an environmental contaminant of concern, especially in northern regions where human exposure to mercury through fish consumption can be high. Mercury accumulation in northern lakes has increased over the past ... -
Long-term changes in spring phytoplankton community composition in five south-central Ontario lakes and their relations with spring water chemistry and climate
(University of Waterloo, 2019-05-23)Spring is an ecologically important period for phytoplankton communities, as environmental stressors such as acid deposition and recovery, climate warming, and shoreline development may exert strong influence at this time ... -
Spatiotemporal patterns of arsenic, antimony, and lead deposition in a sub-arctic gold mining region of Canada
(University of Waterloo, 2021-01-25)Mining operations at Giant and Con mines (Northwest Territories, Canada) resulted in the release of >20,000 tonnes of arsenic trioxide (As2O3) into the atmosphere, mainly during the 1950s, which were deposited on the ...