Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Karl, Katrina Anna-Marie, Thesis advisor (ths): Aherne, Julian, Degree committee member (dgc): Sager, Eric, Degree committee member (dgc): Liang, Tanner, Degree committee member (dgc): Hickie, Brendan, Degree committee member (dgc): McKenna-Neuman, Cheryl, Degree granting institution (dgg): Trent University Abstract: <p>Plastic pollution is a growing concern, owing to its durability, ubiquity, and potential health impacts. The overall objective of this study was to assess the abundance and distribution of microplastics within Lake Scugog catchment, Ontario. This was fulfilled through two tasks (i) the development of a microplastic particle budget for the lake catchment, and (ii) the determination of the… more Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Johannessen, Cassandra, Thesis advisor (ths): Metcalfe, Chris D, Thesis advisor (ths): Parnis, J. Mark, Degree committee member (dgc): Metcalfe, Chris D, Degree committee member (dgc): Parnis, J. Mark, Degree committee member (dgc): Dang, Huy, Degree committee member (dgc): Hickie, Brendan, Degree granting institution (dgg): Trent University Abstract: <p>Road runoff is a vector for the transport of potentially toxic chemicals into receiving waters. In this study, selected tire-derived chemicals were monitored in surface waters of rivers adjacent to two high traffic highways in the Greater Toronto Area in Ontario, Canada. Composite samples were collected from the Don River and Highland Creek in the GTA during 5 hydrological events that… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis investigated coloured and fluorescent dissolved organic matter in the Canada Basin, Arctic Ocean from 2007 to 2017. The first interannual time-series of its kind in the Canada Basin incorporated the use of EEM-PARAFAC to validate a seven-component model. Statistical temporal tests revealed (1) an increasing protein-like intensity in the upper polar mixed layer (UPML); (2)… more Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Environmental monitoring and investigation of metal biogeochemical cycling has been</p><p>carried out in the Pearl River Estuary (PRE), an important and complex system in Southern</p><p>China. In this study, rare earth element (REE) patterns as well as isotope ratios (i.e., Zn and Cd)</p><p>were evaluated as tools to identify contamination sources in… more Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Mixtures of metals occur in surface waters, toxicity of which has drawn world-wide attention due to their crucial role in both ecotoxicology and regulations. The present research was undertaken to study the acute toxicity of binary mixtures of Ni, Cu, Zn, and Cd to the freshwater organism, Daphnia magna. The experimental approach included single and binary metal toxicity tests based on… more Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Socio-ecological systems are inherently complex and marine mammals are fundamentally challenging to study. In the Arctic, marine mammals occupy a central ecological role, as nutrient cyclers and as a source of food and culture for Indigenous peoples. Inuit have developed a rich knowledge system, which has not been fully actualized in application in most Arctic research. Considering the… more Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis explored the contribution of mixed methods approaches to marine mammal science through the use of concurrent and sequential designs to study distribution and feeding ecology of bowhead whales (Balaena mysticetus) in the Arctic region of Nunavik, Quebec, Canada. The study combines Inuit knowledge (IK), collected through semi-directed interviews with Inuit harvesters, and… more Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Celsie, Alena Kathryn Davidson, Thesis advisor (ths): Mackay, Donald, Thesis advisor (ths): Parnis, Mark, Degree committee member (dgc): Hickie, Brendan, Degree committee member (dgc): Mackay, Donald, Degree committee member (dgc): Parnis, Mark, Degree committee member (dgc): Aherne, Julian, Degree granting institution (dgg): Trent University Abstract: <p>Models of partitioning, uptake, and toxicity of neutral organic chemicals in fish</p><p>Alena Kathryn Davidson Celsie</p><p>A novel dynamic fugacity model is developed that simulates the uptake of chemicals in fish by respiration as applies in aquatic toxicity tests. A physiologically based toxicokinetic model was developed which calculates the time-course of… more Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Baya, Pascale Anabelle, Thesis advisor (ths): Hintelmann, Holger, Degree committee member (dgc): Lamborg, Carl, Degree committee member (dgc): Hickie, Brendan, Degree committee member (dgc): Georg, Bastian, Degree granting institution (dgg): Trent University Abstract: <p>Monomethylmercury (MMHg), the most bioavailable form of mercury (Hg) and a potent neurotoxin, is present at elevated concentrations in Arctic marine mammals posing serious health threats to the local populations relying on marine food for their subsistence living. The sources of MMHg in the Arctic Ocean surface water and the role of dimethylmercury (DMHg) as a source of MMHg remain… more Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Abstract: <p>While there is an emerging body of literature on the role and effectiveness of community-based research (CBR) in addressing the needs of local communities, few studies have explored its promise in areas lacking established collaborative models. The purpose of this paper is to examine the potential of CBR to meet the sustainable community development needs of the primarily urban Durham… more Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Silver nanoparticles (AgNP) released into aquatic environments could threaten natural bacterial communities and ecosystem services they provide. We examined natural lake bacterioplankton communities' responses to different exposures (pulse vs chronic) and types (citrate and PVP) of AgNPs at realistic environmental conditions using a mesocosm study at the Experimental Lakes Area. An… more Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis was designed to quantify absorbance and fluorescence characteristics of dissolved organic matter (DOM) in North Atlantic, Pacific and Arctic Oceans. DOM was described in water masses of distinct sources and formation pathways as well as in regions where environmental forcings such as deep water upwelling, enhanced biological activity and receipt of freshwater discharge were… more
