Trent University Graduate Thesis Collection

Item Description
Identifier
tula:etd
Type
Collection
Language
eng
Extent
1 item
Rights
Copyright for all items in the Trent University Graduate Thesis Collection is held by the author, with all rights reserved, unless otherwise noted.
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Displaying 1 - 4 of 4

Rare earth and trace element geochemistry in Ontario agricultural soils

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Year: 2025, 2025
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Wetzl, Ruby J., Thesis advisor (ths): Thompson, Karen A., Thesis advisor (ths): Dang, Huy, Degree committee member (dgc): Watmough, Shaun, Degree granting institution (dgg): Trent University
Abstract: <p>Agriculture may result in soil disturbances, including contamination by rare earth elements (REE) and trace elements (TEs) from agricultural inputs (e.g. fertilizers, pesticides). Regulations concerning agricultural inputs currently do not consider TE background concentrations, concurrent use of inputs, and emerging contaminants. Therefore, they may not sufficiently protect against TE… more

Inorganic and Organic Carbon Dynamics of a South-Central Ontario Forest After the Application of Non-Industrial Wood Ash

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Year: 2025, 2025
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Foley, Kaylen, Thesis advisor (ths): Watmough, Shaun, Degree committee member (dgc): Power, Ian, Degree committee member (dgc): Thompson, Karen, Degree granting institution (dgg): Trent University
Abstract: <p>Forests play a critical role in the global carbon cycle, acting as carbon sinks that remove and store an estimated 0.4 to 4.1 Pg of atmospheric carbon annually. However, historical acid deposition and timber harvesting have disrupted nutrient cycles, leading to nutrient-deficient soils that hinder tree growth, particularly for sugar maple (Acer saccharum), a keystone species in Ontario… more

The biogeochemical fate of rare earth elements in aquatic ecosystems

Kernaghan_trentu_0513N_11288-Thumbnail Image.png
Year: 2025, 2025
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Kernaghan, Ashlyn, Thesis advisor (ths): Dang, Huy D, Degree committee member (dgc): Fortin, Claude, Degree committee member (dgc): Watmough, Shaun, Degree granting institution (dgg): Trent University
Abstract: <p>Rare earth elements (REEs) are in high demand globally for the green transition and high technologies. The growing demand leads to their release into aquatic ecosystems from various point and non-point sources, which creates urgency to investigate their fate and enrichment. This thesis further investigates the biogeochemical fate and REE uptake mechanisms throughout aquatic ecosystems.… more

Impacts of wildfire on dissolved organic matter in boreal headwater streams

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Year: 2025, 2025
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Matula, Erin Rae, Thesis advisor (ths): Tanentzap, Andrew, Thesis advisor (ths): Emilson, Erik, Degree committee member (dgc): Watmough, Shaun, Degree granting institution (dgg): Trent University
Abstract: <p>Increasing wildfire frequency, driven by climate change, can change the concentration andcomposition of dissolved organic matter (DOM) exported from land into receiving waters by
removing terrestrial vegetation, changing soil hydrology, and interrupting microbial degradation.
In this thesis, I tested how wildfire impacts the molecular composition and reactivity of DOM. I
compared DOM… more