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Assessing Algal Community Structure and Nutrient Uptake Kinetics Across a Nutrient Gradient in Agricultural Streams
DownloadFall 2020
Streams provide important ecosystem services, such as the transformation of organic matter and water purification, while transporting water from headwaters to larger receiving waterbodies downstream. Excess nutrients introduced through anthropogenic land use put stress on aquatic ecosystems and...
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Assessing Spatial and Temporal Variation in Source Water Quality and Drinking Water Treatability Across a Gradient of Forest Harvest on Vancouver Island, BC
DownloadFall 2021
On Canada’s Pacific Coast, forestry is integral to society. Although economically important, harvesting practices may alter source waters that originate in forested watersheds through changes in suspended solids (SS) and dissolved organic matter (DOM). Each of these metrics has the potential to...
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Fall 2021
Streams provide essential ecosystem services including nutrient cycling and uptake, organic matter processing and ecosystem production and respiration. Stream ecosystem functioning provides an integrated metric of biological structures and processes that can respond to anthropogenic land use...
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Composition and Biodegradation of DOM Leached from Permafrost End-members across the Western Canadian Arctic
DownloadFall 2020
Organic matter, upon dissolution into the aqueous state as dissolved organic matter (DOM), can undergo mineralization by microbes (biodegradation). There has been increasing effort to characterize DOM released from thawing permafrost because it may perpetuate a permafrost carbon feedback....
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Dissolved Organic Carbon Mobilization and Degradation Patterns in Retrogressive Thaw Slumps of the Peel Plateau, Northwest Territories, Canada
DownloadFall 2016
Anthropogenic climate change has affected the Canadian Arctic cryosphere, accelerating the development of retrogressive thaw slumps (RTS) across the Peel Plateau, NWT, Canada. RTS result from the thawing of ice-rich permafrost and develop due to ablation of ground ice exposed in the slump...
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Icing dynamics in the lake-dominated, discontinuous permafrost Taiga Shield, and effects on fluvial biogeochemistry, carbon cycling and microbial communities
DownloadFall 2023
Climate warming is affecting freshwater systems across the western Canadian subarctic, due to widespread shifts in precipitation regimes, permafrost degradation, and multi-decadal increases in winter baseflow. These changes are significant on the Taiga Shield, which comprises ~20% of North...
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Limnology of a Large Northern Lake (Lhù’ààn Mânʼ [Kluane Lake], Yukon) in an Era of Reconciliation and Rapid Climate Change
DownloadSpring 2022
Almost 60% of Canada’s freshwater drains North, where air temperatures are increasing at twice the global rate. Despite the exposure of northern lakes to higher rates of change and their ecological, hydrological, and cultural importance, baseline knowledge and monitoring of their water properties...
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Nutrient limitation of periphyton in agricultural streams: Implications for watershed management
DownloadSpring 2021
Freshwater streams are ecologically important as sources of habitat, unique biodiversity, and valued ecosystem services. Yet, stream health can be threatened by intensified nutrient loading derived from adjacent anthropogenic land-uses such as agricultural and municipal developments. Since algal...
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Rapid thaw-driven geomorphic change transforms fluvial, sedimentary, and biogeochemical environments in the Willow River, NT
DownloadSpring 2023
The effects of global climate change are acute in permafrost environments. In the western Canadian Arctic, permafrost degradation of ice-rich slopes is resulting in the development of thermokarst and other forms of mass wasting, which transports previously frozen materials into aquatic systems....
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Shifts in organic matter character and microbial community dynamics from glacier headwaters to downstream rivers in the Canadian Rocky Mountains
DownloadSpring 2023
Climate change is causing mountain glacial systems to warm rapidly, leading to increased water fluxes from these catchments and concomitant export of glacially-derived sediment and organic matter (OM). Glacial OM represents an aged, but potentially bioavailable carbon pool that is compositionally...