Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Many communities in Canada rely on water sourced from boreal forest headwaters for their drinking water. The Boreal Shield Ecozone is highly susceptible to climate change which threatens to exacerbate the effects of natural and human-driven disturbances such as wildfire, insect infestation and harvesting on water quality. Therefore, examining source water quality in headwater catchments… more Full Text: The effects of forest disturbance on dissolved organic carbon in the Algoma region, central Ontario A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Penney, Chantelle, Thesis advisor (ths): Wilson, Chris C, Thesis advisor (ths): Burness, Gary, Degree committee member (dgc): Scott, Graham, Degree committee member (dgc): Craig, Paul, Degree committee member (dgc): Freeland, Joanna, Degree granting institution (dgg): Trent University Abstract: <p>Climate change is a major conservation concern, especially for many cold-adapted species. The rate of warming due to climate change will likely outpace adaptive responses, and many populations will likely need to rely on phenotypic plasticity to cope with environmental warming. It is currently unclear whether plasticity in physiological responses to warming will be sufficient to offset… more Full Text: WITHIN-GENERATION AND TRANSGENERATIONAL THERMAL PLASTICITY IN COLD-ADAPTED SALMONIDS OF THE GENUS SALVELINUS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements for the Degree of Doctor of Philosophy in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Acoustic communication is vital for mediating interactions between individuals and their environment. From echolocating bats to isolated rodent pups, ultrasonic vocalizations are a useful mechanism for producing localized and cryptic acoustic signals. Flying squirrels have been demonstrated to produce almost exclusively ultrasonic calls which is rare in both squirrels and mammals, though… more Full Text: The ecological, evolutionary, and behavioural context of ultrasonic vocalizations in flying squirrels A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements for the Degree of Doctor of Philosophy in the Faculty …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Wabigoon River is known for an historic mercury (Hg) pollution source, caused by a chlor-alkali facility operating in the 1960s. As legacy Hg contamination continues to cause serious adverse health effects to the local communities living in the Wabigoon River region, it is imperative to undertake additional research to understand the deposition and transport of historical mercury in… more Full Text: Assessing Mercury and Methylmercury levels in the Wabigoon River with special aten�on on mercury methyla�on A Thesis Submited to the Commitee on Graduate Studies in Par�al Fulfilment of the Requirements for the Degree of Doctor of Philosophy in the Faculty …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Solmundson, Kirsten, Thesis advisor (ths): Wilson, Paul, Thesis advisor (ths): Bowman, Jeff, Degree committee member (dgc): Patterson, Brent, Degree committee member (dgc): Manseau, Micheline, Degree granting institution (dgg): Trent University Abstract: <p>Globally, wildlife populations are experiencing increasing rates of range loss, population decline, and extinction. Caribou (Rangifer tarandus) have experienced dramatic declines in both range and population size across Canada over the past century. Boreal caribou (R. t. caribou), one of twelve Designatable Units, have lost approximately half of their historic range in the last 150 years… more Full Text: CONSERVATION GENOMICS OF THE LAKE SUPERIOR CARIBOU A dissertation submitted to the Committee on Graduate Studies in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>A key knowledge gap in aeolian transport research concerns the adjustment of saltation processes to the extreme conditions found within high-latitude regions. A series of wind tunnel experiments were carried out under full climate control and over a wide range in humidity. Particle entrainment and transport within shearing flows of varied wind speed were monitored over beds of varied… more Full Text: i INVESTIGATION OF DYNAMICS OF PARTICULATE TRANSPORT UNDER VARYING CLIMATE CONDITIONS A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In Ontario, farmers commonly use a MZ (Maize (Zea mays L.))-SB (Soybean (Glycine max))/WW (Winter wheat (Triticum aestivum)) – CC (mixed cover crop) rotation to maximize economic benefits. This study aimed to investigate the short-term impacts of the crop rotation phases and their associated management practices in this diversified cash crop rotation on soil health and the abundance of… more Full Text: SOIL HEALTH AND SOIL MICROBIAL RESPONSES TO CASH CROP MANAGEMENT IN ONTARIO A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Roy, Tyler, Thesis advisor (ths): Vreugdenhil, Andrew AV, Degree committee member (dgc): Parnis, Mark MP, Degree committee member (dgc): Shetranjiwalla-Merchant, Shegufta SM, Degree committee member (dgc): Rafferty, Steven SR, Degree granting institution (dgg): Trent University Abstract: <p> Naphthenic acids are a major contaminant of concern and a focus of much research around remediation of oil sand process affected waters, OSPW. Using activated carbon adsorbents are an attractive option given their low cost of fabrication and implementation. A deeper evaluation of the effect naphthenic acid structural differences have on uptake affinity is warranted. In this thesis an in… more Full Text: The Characterization of Model Naphthenic Acid Adsorption onto Activated Carbons: Effects of both Textural and Functional Properties A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The detection of ciguatoxins (CTXs) in biological samples is challenging due to their low concentrations, the presence of various congeners, and the absence of standardized methods. This study uses high resolution mass spectrometry (HRMS) with P-CTX-3B as a reference standard. The protonated molecules ([M+H]+) were most prevalent, especially when acetonitrile/water was utilized,… more Full Text: Advancements and Challenges in Ciguatoxin Detection: Developing a HighResolution Mass Spectrometric Method for the Identification of P-CTX-3B A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Northern flying squirrels (NFS) are mycophagous specialists (fungi-dominated diet) thatmay be displaced with southern flying squirrel (SFS) range expansion, thereby limiting
fungal dispersal in forest communities. To understand the implications of squirrel
species turnover on mycophagy, we investigated the home ranges of both flying squirrel
species who are living in stable sympatry. We… more Full Text: Movement patterns, food availability, and fungal diets of sympatric flying squirrels in the Kawartha Highlands A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Great Lakes represent nearly a fifth of the global freshwater surface supply, and support culturally, economically, and ecologically important fish species such as Walleye (Sander vitreus). With water temperatures projected to rise by several degrees in the coming century, understanding the energetic impacts on fishes is crucial for effective habitat and fisheries management. I… more Full Text: Calibration of accelerometer transmitters for estimating field metabolic rates in walleye (Sander vitreus) A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Long-term avian population declines, particularly for the avian insectivore guild, are a conservation concern. With widespread and continuing population trends, climate change and its negative effects on avian food resources is a plausible cross-species driver. My goal was to evaluate whether bottom-up trophic effects of climate change could be influencing avian populations. I used a… more Full Text: Bottom-up pathways for arthropods and forest breeding birds in a southern Ontario forest. A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The neuronal ceroid lipofuscinoses (NCLs), commonly known as Batten disease, are a family of fatal neurodegenerative disorders that primarily affect children. Several subtypes of NCLs have been reported, each being caused by a mutation in a distinct ceroid lipofuscinosis neuronal (CLN) gene; this results in aberrant lysosome function and the accumulation of lipoprotein aggregates (known… more Full Text: Insights from Dictyostelium: Examining the role of cellular stress in Batten disease A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for Degree of Master of Science in the Faculty of Arts and Science …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Taylor, Courtney Erin, Thesis advisor (ths): Dunlop, Erin S, Degree committee member (dgc): Lauzon, Ryan, Degree committee member (dgc): Raby, Graham, Degree committee member (dgc): Rennie, Michael, Degree granting institution (dgg): Trent University Abstract: <p>Lake Huron's food web has experienced drastic changes in response to multiple stressors including declines in offshore productivity, decreased trophic transfer efficiency and a transformation of the benthic food web. However, how these changes have affected the diets and isotopic niches of predatory fish is largely unexplored. My diet study analysed stomach contents from five… more Full Text: Regional diet and isotopic niche of predatory fish following a regime shift in Lake Huron A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Giardia intestinalis is the causative agent of a diarrheal disease in mammals, but the mechanisms of disease pathogenesis are unclear. While proteins secreted by Giardia affect the host cells, the potential of hormone secretion has not been investigated to date. Cytokinins (CKs) are classified as phytohormones, but little is known about their role beyond plants. Mass spectrometry-based… more Full Text: The effect of cytokinins on the metabolite secretome of Giardia intestinalis during trophozoite growth, nutrient deprivation, and encystation A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Animal migration is defined as the seasonal movement from one independent and non-overlapping range to another. Understanding how and why animals migrate is important not only to understand their life history processes but also for informing other important ecological processes such as the spread of wildlife disease and habitat alteration. Animal migrations have been impacted by human… more Full Text: i Assessing the drivers of white-tailed deer (Odocoileus virginianus) migration: Exploring changing predation risk and food availability in an Ontario population A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Muskrat populations are declining across North America. In recent decades, hybrid cattail Typha x glauca has been invading wetlands in North America. This invasion is degrading wetland habitat, leading to reduced interspersion of water and vegetation. Muskrats are wetland-obligates and their populations are positively linked to marsh interspersion. Therefore, muskrat populations may be… more Full Text: Impacts of invasive hybrid cattail Typha x glauca and reduced marsh interspersion on muskrats (Ondatra zibethicus) in North America A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of Master …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Fungi are a diverse group of organisms that play crucial roles in various ecological processes and have immense economic importance. Understanding the intricate mechanisms underlying fungal growth and development is fundamental to harnessing their potential and exploring their applications in different fields. Signalling molecules, such as hormones, have been identified as key regulators… more Full Text: The search for myco-hormones in the metabolome of the model organism Sordaria macrospora via LC-MS/MS. A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirement for the Degree of Master of Science In the Faculty of …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Animals are essential to freshwater biogeochemistry and productivity. Through their excretion, aquatic consumers release bioavailable nutrients and carbon that can vary with animal taxonomic rank, trophic position, and abiotic factors such as light and nutrient supply. In fresh waters, light and nutrient supply is often modulated by dissolved organic matter (DOM), a "murky"… more Full Text: Animal-mediated elemental cycling across time, space, and animal functional traits A Dissertation Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Knight, Caitlyn, Thesis advisor (ths): Kapron, Carolyn, Degree committee member (dgc): Tobin, Stephanie, Degree committee member (dgc): Huber, Robert, Degree committee member (dgc): West, Sarah, Degree granting institution (dgg): Trent University Abstract: <p>Cadmium is a toxic metal that has detrimental effects on blood vessel development and function. To examine the effect of varying concentrations of cadmium on angiogenesis, two in vitro assays were used. First, developing yolk sac blood vessels were studied in gestation day 8 mouse embryos exposed to medium alone, 1.25, or 1.75 μM cadmium chloride (CdCl2). Embryos exposed to 1.25 μM… more Full Text: Concentration-Dependent Effects of Cadmium on Mouse Angiogenesis In Vitro A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Phosphorus is the growth-limiting nutrient in freshwater environments. Dissolved organic phosphorus (DOP) refers to phosphorus within dissolved organic matter (DOM). Much of DOP is bioavailable, but it is poorly understood due to its complexity. This thesis explores the export DOP to Lake Erie from its tributaries, by investigating its speciation and concentration seasonally through… more Full Text: DISSOLVED ORGANIC PHOSPHORUS AND DISSOLVED ORGANIC MATTER IN LAKE ERIE AND ITS TRIBUTARIES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Wetlands are highly susceptible to the invasion of invasive species. The invasive hybrid cattail (Typha × glauca) is prevalent in the southeastern Prairie Pothole Region (PPR) wetlands. However, concerns arise about its recent proliferation in the northwestern PPR without maternal T. angustifolia. To determine taxonomic distribution, I used species-specific PCR-RFLP and microsatellite… more Full Text: Range Expansion of Invasive Hybrid Cattails (Typha × Glauca) in the Prairie Pothole Region A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I investigated the climate vulnerability of a cold-water salmonid by observing the upper thermal tolerance of brook trout (Salvelinus fontinalis) across multiple life stages. Using hatchery- and wild-ancestry fish, I assessed variation in thermal tolerances and carryover effects within and among brook trout life stages and populations that were reared under varying winter thermal regimes… more Full Text: Impacts of embryo incubation temperature on ontogenic thermal tolerance of brook trout (Salvelinus fontinalis) A Thesis submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>ABSTRACT</p><p>Development of Forest Degradation Indicators from Long-term Trajectories of Multispectral Satellite Images, and their Projections into the Future
under Climate Change, in Ontario, Canada</p><p>Md. Mozammel Hoque</p><p>Ontario forests are affected by natural and anthropogenic disturbances leading to forest degradation, which significantly… more Full Text: Development of Forest Degradation Indicators from Long-term Trajectories of Multispectral Satellite Images, and their Projections into the Future under Climate Change, in Ontario, Canada A Dissertation Submitted to the Committee on Graduate Studies in …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Giardia intestinalis is a parasitic protozoan that possesses a flavohemoglobin (gFlHb), an enzyme that plays a role in the detoxification of reactive nitrogen species (RNS) and reactive oxygen species (ROS) via its nitric oxide dioxygenase (NOD) activity as well as its NADH-oxidase activity. This enzyme is a potential target for imidazole-based antigiardial drugs that act as ligands of… more Full Text: Rapid Assays to Test for Flavohemoglobin Inhibitors A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the Faculty of Arts and Science Trent University Peterborough, …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Eutrophication is an ongoing global problem and agriculture is an important non-point source of nutrient loading. Specifically, nitrogen (N) and phosphorus (P) losses from agricultural landscapes continue to drive water quality issues. In southern Ontario, agriculture has intensified in recent decades, with major expansions of cash crop production and extensive tile drainage (TD).… more Full Text: Effects of tile drainage, seasonality, and cash crop rotation on edge-of-field nitrogen and phosphorus losses from southern Ontario Watersheds A thesis submitted to the Committee on Graduate Studies In partial fulfillment of these thesis requirements for …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Population cycles are characterized by predictable temporal oscillations in population size and are influenced by densities of both predators and prey. These oscillations are influenced by the predator functional response, i.e. the influence of prey density on predator kill rate. The Canada lynx (Lynx canadensis) is a predatory mammal with cyclic northern populations driven by snowshoe… more Full Text: Behavioural responses of Canada lynx (Lynx canadensis) to cyclic declines in the snowshoe hare (Lepus americanus) A Dissertation Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>We studied the physiological and molecular responses of lab-grown Daphnia pulex to shifts in dietary (carbon, nitrogen, phosphorus, and cyanobacteria) and growth media (calcium) nutrient supply using a set of potential biomarkers via qPCR. Each examined nutrient had a strong effect on Daphnia mass-specific growth rate, and we found significant dose-dependent effects of treatment level (… more Full Text: GENES RESPOND IN A DOSE-DEPENDENT MANNER TO NUTRITIONAL STRESS IN THE FRESHWATER ZOOPLANKTER, DAPHNIA PULEX A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Due to climate change and managed care, birds may face interacting effects of novel diets and environmental temperatures. I examined how captive zebra finches (Taeniopygia guttata) responded to a 6-month acclimation to either thermoneutral or cool temperatures when provided with saturated or unsaturated fatty acid enriched diets. Body mass was lower on the unsaturated fatty acid diet,… more Full Text: DIETARY FATTY ACID CONTENT CHANGES THE LONG-TERM ACCLIMATION RESPONSE OF A CAPTIVE BIRD (TAENIOPYGIA GUTTATA) TO AMBIENT TEMPERATURES A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Agricultural and urban land uses have been linked to the recent resurgence of eutrophication and salinization issues in the lower Great Lakes. This thesis examined the relationship between watershed land use and stream nitrate-nitrogen (NO3-N), total phosphorus (TP), and chloride (Cl) concentrations across southern Ontario. Using a self-organizing map analysis, the watersheds were… more Full Text: EVALUATING THE RELATIONSHIPS BETWEEN LAND USE AND STREAM NUTRIENT AND CHLORIDE CONCENTRATIONS ACROSS SOUTHERN ONTARIO A thesis submitted to the Committee of Graduate Studies in partial fulfilment of the requirements for the Degree of Master of Science in …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Recovery of forest soils from chronic acidification can be enhanced with the use of non-industrial wood ash (NIWA). Non-industrial wood ash is alkaline and contains high concentrations of macronutrients, but trace metal concentrations must be evaluated to limit risk of metal toxicity following application. Additionally, understanding how different forest ecosystem components respond to… more Full Text: Biogeochemical Responses to a Non-Industrial Wood Ash Addition in a SouthCentral Ontario Forest A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the Faculty of Arts …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I used 31 years of Semipalmated Plover (Charadrius semipalmatus) population data to assess the effects of vital rates on a local breeding population of plovers in Churchill, Manitoba, Canada. I used three similar Bayesian Integrated Population Models (IPMs), with the last a coupled IPM population viability analysis (PVA) approach to predict the impact of changing spring temperatures on… more Full Text: Thirty Years of Local Semipalmated Plover (Charadrius semipalmatus) Population Dynamics in Churchill, Manitoba, Canada: A Long-Term Study on Factors Influencing the Rate of Population Change Over Time A Thesis submitted to the Committee on Graduate …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Quantifying the impacts of environmental conditions on the abundance of wildlife populations is important for making informed management decisions in the face of increasing environmental threats. Managers require robust tools to estimate abundance and density of wildlife rapidly and with precision. Within the context of studying white-tailed deer, I evaluated the use of camera-traps and… more Full Text: Remote Camera-traps as a Management Tool: Estimating Abundance and Landscape Effects on the Density of White-tailed Deer A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Hybridization contributes to the genetic diversity and can impact speciation. This study investigates the genetic evidence of recent hybridization under climate change in sympatric populations of northern and southern flying squirrels in Ontario. Using low-coverage whole-genome sequences, my research examines the existing population structure and measures the genomic variation of the… more Full Text: 1 2 3 GENOMIC SIGNATURES OF SPECIATION IN SYMPATRIC FLYING SQUIRRELS 4 5 6 7 8 9 A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science 10 …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Bonar, Maegwin, Thesis advisor (ths): Northrup, Joseph M, Thesis advisor (ths): Shafer, Aaron BA, Degree committee member (dgc): Koen, Erin, Degree committee member (dgc): Schaefer, James, Degree granting institution (dgg): Trent University Abstract: <p>Animal migrations are ubiquitous and one of the most threatened ecological processes globally. Because of the multifaceted nature of migration – seasonal movements between home ranges – it can be difficult to tease apart the underlying mechanisms influencing this behaviour. It is necessary to understand these mechanisms, not only to deepen our fundamental understanding of migration in… more Full Text: The ecology and evolution of animal migration – an integrative approach to the drivers of phenotypic variation A dissertation submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of Doctor of Philosophy …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Blondin, Anne, Thesis advisor (ths): Nol, Erica, Degree committee member (dgc): Drever, Mark, Degree committee member (dgc): Flemming, Scott, Degree committee member (dgc): Burness, Gary, Degree granting institution (dgg): Trent University Abstract: <p>Many species of shorebirds depend on stopover sites to rest and refuel during their long-distance migrations. To determine how shorebirds use migratory stopover sites, we tracked three species of shorebirds at two stopover sites in British Columbia, Canada from 2018-2021 during northward and southward migration using automated telemetry. Western Sandpipers (Calidris mauri) stayed longer… more Full Text: Length of stay and habitat use of shorebirds at two migratory stopover sites in British Columbia, Canada A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the Faculty …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This study examines the atmospheric (synoptic) controls on snowmelt and snow-free season carbon dioxide (CO2) fluxes at Daring Lake, Northwest Territories. Atmospheric circulation patterns were derived from 500 hPa geopotential height and classified using the self-organizing maps artificial neural network. Snowmelt timing was not found to be influenced by atmospheric circulation patterns… more Full Text: THE INFLUENCE OF ATMOSPHERIC CIRCULATION ON SNOWMELT AND CARBON FLUXES IN THE CANADIAN LOW ARCTIC A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Dissolved organic matter (DOM) plays a vital role in lake ecosystems, yet its temporal and spatial variations in lakes remain poorly understood. This study investigates DOM dynamics in boreal lakes during the warm season and the Laurentian Great Lakes ice during winter. Sampling 10 boreal lakes in early and late June 2022, revealed subtle changes in DOM in the epilimnion and hypolimnion… more Full Text: Spatiotemporal patterns of dissolved organic matter in Boreal Shield lakes and ice of the Laurentian Great Lakes A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirement for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Glyphosate burndown and tillage, followed by the cultivation of cash crops, are frequently used techniques in LUC from perennial cropping systems (PS) to annual cropping systems (AS). Agricultural LUC can result in the loss of soil nitrogen (N) via emission of nitrous oxide (N2O), a potent greenhouse gas (GHG). The purpose of this thesis is to investigate the short-term impacts of… more Full Text: SHORT-TERM IMPACTS OF AGRICULTURAL LAND USE CHANGE ON SOIL HEALTH AND NITROGEN CYCLING MICROBIAL COMMUNITIES A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Advanced generation/backcrossed (non-F1) hybrids can be challenging to identify when their traits are similar to those of parental taxa, F1 hybrids, or both. This is particularly evident in the North American hybrid zone involving Typha latifolia, T. angustifolia, F1 T. × glauca and non-F1 hybrids. Cattails are challenging to differentiate based on gross morphological characteristics.… more Full Text: Accuracy and reliability of microscopic characteristics to identify Typha species and their hybrids A thesis submitted to the Committee on Graduate Studies in partial fulfilment of the requirements for the degree of Master of Science in the Faculty of …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Although stormwater management ponds (SWMPs) are frequently used to mitigate flooding in urban areas, we still do not fully understand how these systems impact water quality in a watershed. Currently, most research focuses on the effectiveness of SWMPs to retain nutrients during high flows, even though there is potential for internal nutrient releases to occur in these systems during low… more Full Text: NUTRIENT DYNAMICS AND STOICHIOMETRY IN STORMWATER MANAGEMENT PONDS A Dissertation Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and Science. TRENT …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Orr, Amanda, Thesis advisor (ths): Stotesbury, Theresa, Thesis advisor (ths): Wilson, Paul, Degree committee member (dgc): Stotesbury, Theresa, Degree committee member (dgc): Wilson, Paul, Degree committee member (dgc): Stock, Naomi, Degree granting institution (dgg): Trent University Abstract: <p>Access to human blood for forensic research and training in bloodstain pattern analysis (BPA) can be difficult due to many ethical, safety and cost concerns. Mammalian blood alternatives can be sourced, especially from local and willing abattoirs, but some concerns remain, and the added difficulties of high variation and species-specific differences in cellular components pose other… more Full Text: The design of DNA-containing biomaterials for forensic science A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for Degree of Doctor of Philosophy in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Objectives/purpose: This study examined the psychosocial health (including resilience, hope, social functioning, mental wellbeing, and stress) of childhood cancer patients attending a recreational oncology camp (ROC).Methods: Childhood cancer patients enrolled for ROC participated in a survey on the first (T1) and last (T2) day of camp, and 3 months post-camp (T3). This survey included… more Full Text: THE EFFECT OF ONCOLOGY CAMP ON THE PSYCHOSOCIAL HEALTH OF CHILDHOOD CANCER PATIENTS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Jermilova, Una, Thesis advisor (ths): Hintelmann, Holger, Thesis advisor (ths): Kirk, Jane L, Degree committee member (dgc): Hintelmann, Holger, Degree committee member (dgc): Kirk, Jane L, Degree committee member (dgc): Landis, Wayne, Degree committee member (dgc): Buell, Mary-Claire, Degree granting institution (dgg): Trent University Abstract: <p>A significant portion (15-20%) of mercury (Hg) in the Arctic Ocean is believed to originate from Arctic rivers, such as the Mackenzie River watershed in the NWT. Recent (2005- 2020) Hg monitoring data of freshwater and fish tissue and environmental model outputs were compiled and used to develop a Bayesian Network Relative Risk model (BN-RRM), a probabilistic model capable of analyzing… more Full Text: BAYESIAN NETWORK MODEL OF MERCURY EXPOSURE TO AQUATIC ECOSYSTEMS OF THE MACKENZIE WATERSHED A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Mineral feedstocks, including alkaline mine wastes, can sequester CO2 as a dissolved phase (e.g., HCO3-) or a solid carbonate via enhanced rock weathering (ERW). For this thesis, the release of easily accessible Ca and Mg from non-carbonate sources was determined for kimberlite residues from several diamond mines and commonly proposed ERW rock types, including wollastonite and olivine.… more Full Text: PREDICTING AND MONITORING DRAINAGE CHEMISTRY DURING MINERAL WEATHERING FOR CO2 SEQUESTRATION A thesis submitted to Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Levasseur, Patrick, Thesis advisor (ths): Watmough, Shaun, Degree committee member (dgc): Aherne, Julian, Degree committee member (dgc): Sager, Eric, Degree committee member (dgc): Emilson, Erik, Degree granting institution (dgg): Trent University Abstract: <p>Mining and smelting degraded landscapes are characterised by heavily eroded soils that are acidic, contaminated with toxic metals, and depleted of essential nutrients. Regreening degraded landscapes has been proposed to support global carbon (C) mitigation measures and protect biodiversity. One of the world's largest regreening programs in the City of Greater Sudbury, Canada has… more Full Text: The biogeochemistry of regreened forests on a mining and smelting degraded landscape A Thesis Submitted to the Committee on Graduate Studies in the Partial Fulfilment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Migratory fish can influence the rivers where they spawn by depositing nutrients and organic matter which increase primary and secondary production. Past research in the Laurentian Great Lakes has focused on individual tributaries, accordingly, the spatial extent of subsidies and how environmental factors influence subsidies are not clear. To determine which tributaries received… more Full Text: Spatial Patterns of Resource Subsidies in Great Lakes Tributaries from Migratory Fishes A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This study reports on as series of laboratory wind tunnel experiments aimed at furtheringour understanding of aggregate breakdown and dust release during aeolian transport, and
thereby, has implications for air quality and the management of dust emission through water
application. Particles aggregates 500 um in diameter were formed and isolated by the
wetting, drying, and screening of… more Full Text: LABORATORY WIND TUNNEL EXPERIMENT ON DUST GENERATION DURING THE SALTATION OF AGGREGATES FORMED FROM OWENS LAKE PLAYA SEDIMENTS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Lake whitefish (Coregonus clupeaformis) are ecologically, economically, and culturally significant across their range, yet little is documented about the species' spawning behaviour. Recruitment of lake whitefish has dramatically declined over the past two decades across many regions of the Laurentian Great Lakes, most notably in lakes Huron and Michigan, prompting research efforts… more Full Text: Sex-specific spawning behaviour of lake whitefish in Lake Huron revealed by fine-scale acoustic telemetry A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Brown, Rachel, Thesis advisor (ths): Aherne, Julian, Degree committee member (dgc): Koprivnjak, Jean-François, Degree committee member (dgc): Sager, Eric, Degree committee member (dgc): Lafleur, Peter, Degree granting institution (dgg): Trent University Abstract: <p>In this study, twenty lake catchments surrounding Iqaluit, Baffin Island, were assessed for trace element concentrations (Al, As, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Se, THg, V, Zn) in lake water, catchment soil, lake sediment, and moss (Hylocomium splendens). Additionally, the sources of each trace element were determined through the positive matrix factorization (PMF) model and… more Full Text: i Trace elements in lake catchments surrounding Iqaluit, Baffin Island, NU A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the Faculty of Arts and Science Trent …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Annan, Melanie Joslyn, Thesis advisor (ths): Frost, Paul C, Degree committee member (dgc): Koprivnjak, Jean-François, Degree committee member (dgc): Bailey, Robert, Degree committee member (dgc): Raby, Graham, Degree granting institution (dgg): Trent University Abstract: <p>In situ chlorophyll sensors are beneficial for monitoring of long-term impacts of algal blooms and accessing water quality issues in bodies of water. However, more research is needed to validate their efficacy and understand how environmental conditions can influence sensor measurements. I assessed the performance of an in situ chlorophyll sensor under controlled environmental conditions… more Full Text: IN SITU CHLOROPHYLL MEASUREMENTS WITH FLUOROMETRY: IN-LAB VALIDATION AND USE IN LAKE VERTICAL PROFILING A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Understanding the spatial ecology of large carnivores in increasingly complex, multi-use landscapes is critical for effective conservation and management. Complementary to this need are robust monitoring and statistical techniques to understand the effect of bottom-up and top-down processes on wildlife population densities. However, for wide-ranging species, such knowledge is often… more Full Text: LINKING LARGE SCALE MONITORING AND SPATIALLY EXPLICIT CAPTURE– RECAPTURE MODELS TO IDENTIFY FACTORS SHAPING LARGE CARNIVORE DENSITIES: CASE STUDY OF THE AMERICAN BLACK BEAR IN ONTARIO, CANADA A Thesis Submitted to the Committee of Graduate Studies in …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Land cover change has the potential to alter the hydrologic regime from its natural state. Southern Ontario contains the largest and fastest growing urban population in Canada as well as the majority of prime (Class I) agricultural land. Expansions in urban cover at the expense of agricultural land and resultant 'agricultural intensification', including expansion of tile… more Full Text: Land Cover Effects on Hydrologic Regime within Mixed Land Use Watersheds of East-Central Ontario A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Thesis Requirements for the Degree of Master of Science in the Faculty of …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Phenolic compounds are used in industry, such as agriculture and biotechnology, and inevitably end up in our environment. These compounds may serve as a phenolic precursor to produce raw materials for a wide range of applications. Chemical oxidation has been the common synthetic pathway to oxidize phenols and related compounds. However, traditional chemical approaches suffer from use of… more Full Text: Electrochemical versus Chemical Oxidation of Bulky Phenols: 2,6-diphenylphenol and 2,2dihydroxybiphenol A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty …
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 Full Text: Abundance and Distribution of Microplastics in Lake Scugog Catchment, Ontario A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Fungal pathogens adapt to environmental changes faster than their hosts, due in part to their adaptive mechanisms exhibited in response to stress. Ustilago maydis was used to investigate potential natural antisense transcript (NAT) RNA-mediated mechanisms that enhance fungal adaptation to stress. Of the 349 NATs conserved amongst U. maydis and two related smut fungi, five NATs were… more Full Text: Exploring the Role of Natural Antisense Transcripts in the Stress Response of Ustilago maydis A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In Ontario, the dominant cash crop rotations consist of soybean (SB), which is a leguminous crop grown in rotation with maize (MZ) and winter wheat (WW). In addition to these crops, some farmers integrate cover crops (CC) into crop rotation, especially during the fallow period and winter seasons, to reduce nitrogen (N) losses via nitrate (NO3-) leaching and emission of N2 and the… more Full Text: i IMPACTS OF COVER CROPS ON SOIL HEALTH, SOIL NITROGEN DYNAMICS, AND CYTOKININ PROFILES A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Nutrient losses from forest soils caused by decades of acid deposition and intensive tree harvesting have affected tree growth and forest health in North America and Europe. Non-industrial wood ash (NIWA), a substance rich in macronutrients, may be a potential remediation strategy to return lost nutrients to forest. However, the chemical composition of NIWA and its effects on soil and… more Full Text: Non-industrial wood ash chemistry and its biogeochemical effects on sugar maple (Acer saccharum, Marsh.) in three central Ontario sugar-bushes A Thesis Submitted to the Committee on the Graduate Studies in Partial Fulfillment of the Requirements for the …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The accelerated recovery of base-poor soils from the legacy effects of acidic deposition may be possible by applying industrial wood ash as a soil amendment. Wood ash may be an effective soil amendment due to its high alkalinity and concentrations of several essential nutrients, such as calcium, magnesium, potassium, and phosphorus, that are retained after the volatilization of the… more Full Text: Short-term biogeochemical response of hardwood forest soils to wood ash additions in central Ontario A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by progressive loss in function of motor neurons. Elevated levels of biologically important metal ions, such as copper (II) (Cu(II)), zinc (II) (Zn(II)) or iron (III) (Fe(III)), may contribute to the disease. Moreover, Cu(II) interactions with other proteins associated with ALS have been investigated;… more Full Text: ELECTROCHEMICAL AND SURFACE ANALYSIS OF METAL IONS AND TDP-43 PROTEIN INTERACTIONS A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Cytokinins (CKs) are a pervasive group of growth-promoting signaling molecules spanning every kingdom of life. Their roles are best known in plants, where they act as phytohormones controlling nearly all aspects of plant growth and development. CKs continue to be detected in new organisms, posing questions about their roles in such widespread forms of life. The research presented in this… more Full Text: CYTOKININS IN Dictyostelium discoideum: NEW INSIGHTS FOR EXPANDED ROLES DURING THE LIFE CYCLE OF THE SOCIAL AMOEBA A dissertation submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Doctor of …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Beaton, Andy, Thesis advisor (ths): Metcalfe, Robert A, Thesis advisor (ths): Buttle, James M, Degree committee member (dgc): Franklin, Steven E, Degree committee member (dgc): Tolson, Bryan A, Degree granting institution (dgg): Trent University Abstract: <p>Understanding snowpack variability is important as it plays an imperative role in environmental, hydrologic, and atmospheric systems. Research questions related to three linked areas were investigated in this thesis: 1) scaling issues in snow hydrology, 2) forest-snowpack relationships, and 3) methods of integrating snow water equivalent (SWE) into a hydrologic model for a large,… more Full Text: SNOWPACK ESTIMATION AND MODELLING ACROSS SCALES USING FIELD-BASED AND REMOTELY SENSED DATA IN A FORESTED REGION OF CENTRAL ONTARIO A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Nurses have a vital role in counselling their patients towards healthier living. However, nurses tend to have poor metabolic health that may be influenced by lifestyle. Whether this begins during their nursing education is poorly understood. Undergraduate nursing (n=42) and biology (n=15) students had their metabolic health assessed through body measurements, fasting blood glucose and… more Full Text: Discriminating Metabolic Health Status in a Cohort of Nursing Students: A Cross-Sectional Study A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The replacement of petroleum with renewable feedstock for energy and materials has become a priority because of concerns over the environment and finite nature of petroleum. The structures of the available natural biomass feedstocks fall short in delivering key functionality required in materials such as lubricants and phase change energy storage materials (PCMs). The approach taken in… more Full Text: MOLECULAR ARCHITECTURES FOR IMPROVED BIOMATERIALS DERIVED FROM VEGETABLE OILS – APPLICATION TO ENERGY STORAGE AND LUBRICANTS A dissertation submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Habitat loss and fragmentation have significantly contributed to amphibian population declines, globally. Evaluating the state of remaining habitat patches can prove to be beneficial in identifying areas to prioritize in conservation efforts. Pelee Island, Ontario is home to a complex of salamanders including small-mouthed salamanders (Ambystoma texanum), blue-spotted salamanders (A.… more Full Text: Assessing habitat suitability and connectivity for an endangered salamander complex A thesis submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>AbstractDifferences and similarities in exploration and risk-taking behaviours
of two Myotis bat species.
Laura Michele Scott
Behaviours that are repeatable across circumstances and time determine an individual's personality. Personality and behavioural variation are subject to selective pressures, including risks related to the use of different habitat types. I explored the… more Full Text: Differences and similarities in exploration and risk-taking behaviours of two Myotis bat species. A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Walleye (Sander vitreus) are an ecologically and economically significant fish harvestedby recreational and commercial fisheries across Ontario. Adult Walleye are piscivores, but
anecdotal evidence from anglers suggests that Walleye often target aquatic insects such as
mayfly larvae (Ephemeroptera). My research examined the diet of Walleye caught from May to
September in Lake St. Joseph… more Full Text: THE CONTRIBUTIONS OF MAYFLIES (EPHEMEROPTERA: HEXAGENIA SPP.) AND OTHER INVERTEBRATES TO THE SEASONAL DIET OF WALLEYE (PERCIDAE: SANDER VITREUS) A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Increased plant size is expected to have negative consequences for mating by increasing pollen transfer among the same plant. However, recent theoretical studies have demonstrated that this may not be true for clonal plants. Instead, clonal expansion could enhance outcrossing opportunities without increasing selfing by reducing distances to potential mates. I investigated how the spatial… more Full Text: CLONAL STRUCTURE AND MATING PATTERNS IN A NATURAL POPULATION OF SAGITTARIA LATIFOLIA A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Microplastics, plastic particles less than 5 mm in diameter, are ubiquitous in the environment. This study estimated the abundance of microplastics (MP) in atmospheric deposition from four background monitoring stations in Muskoka-Haliburton, south-central Ontario, Canada and quantified the fate of microplastics to three background headwater lake catchments in Muskoka-Haliburton.… more Full Text: Anthropogenic particles and microplastics in headwater lake catchments in Muskoka-Haliburton, Canada A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Species are faced with a variety of challenges in the environment, including natural challenges, such as variability in ambient temperature, and anthropogenic threats, such as habitat transformation associated with urbanisation. Understanding how animals respond to these kinds of challenges can advance the field of behavioural ecology and guide management decisions for wild species. Yet… more Full Text: Behavioural ecology and population dynamics of freshwater turtles in a semi-urban landscape at their northern range limit A Dissertation Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Giardia intestinalis is a waterborne enteric parasite that lacks mitochondria and the capacity for heme biosynthesis. Despite this, Giardia encodes several heme proteins, including four cytochrome b5 isotypes (gCYTB5-I – IV) of unknown function. The aim of this thesis is to gain insight into the function of the Giardia cytochrome b5 isotype III (gCYTB5-III) that is found in the nucleus,… more Full Text: Interactome study of the Giardia intestinalis nuclear localized cytochrome b5 A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I used the Motus Wildlife Tracking System to monitor the fall migration behaviour and assess the underlying drivers of migration strategy in a small shorebird, the Semipalmated Plover (Charadrius semipalmatus), breeding at two subarctic sites: Churchill, Manitoba and Burntpoint Creek, Ontario, Canada. Semipalmated Plovers from both sites departed breeding areas between mid-July and early… more Full Text: Fall Migratory Behaviour and Cross-seasonal Interactions in Semipalmated Plovers (Charadrius semipalmatus) Breeding in the Hudson Bay Lowlands, Canada A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The following study measured dissolved organic carbon (DOC) and total mercury (THg) concentrations in acid sensitive lakes in the Republic of Ireland. Sixty-eight upland lakes and 48 lowland lakes were sampled for DOC; the upland lakes were additionally sampled for THg. Spatial variability of DOC was explained by regional precipitation and soil organic matter. A subset of lakes was… more Full Text: Organic Matter and Total Mercury in Acid-Sensitive Lakes in Ireland A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Objectives/purpose: The current study examined whether attending a 1-month virtual oncology camp (VOC)
improved resilience and hope in childhood cancer patients and parental/caregiver stress.</p><p>Methods:Childhood cancer patients/survivors and their parent/caregivers enrolled for VOC,
participated in an online anonymous survey: before, after and 3-months after VOC. The… more Full Text: THE EFFECT OF ATTENDING A VIRTUAL ONCOLOGY CAMP ON CHILDHOOD CANCER PATIENT’S PYSHCOSOCIAL FUNCTIONING AND PARENTAL STRESS – A PILOT STUDY A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Muir, Gillian, Thesis advisor (ths): Brown, Glen, Degree committee member (dgc): Nol, Erica, Degree committee member (dgc): Metcalfe, Robert, Degree committee member (dgc): Hu, Baoxin, Degree granting institution (dgg): Trent University Abstract: <p>The fine-scale controls of active layer dynamics in the subarctic at the southern edge of continuous permafrost are currently poorly understood. The goal of this thesis was to understand how environmental conditions associated with upland tundra heath, open graminoid fen, and palsas/peat plateaus affected active layer thermal regime in a subarctic peatland in northern Canada. Indices of… more Full Text: Active layer thermal regime in subarctic wetlands at the southern edge of continuous permafrost in Canada A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Increased mining activity in the Canadian Arctic has resulted in significant changes to the environment that may be influencing some tundra-nesting bird populations. In this thesis I examine the direct and indirect effects of mining on birds nesting in the Canadian Arctic. I first perform a literature review of the effects that mining in the Arctic has on northern environments and… more Full Text: RELATIONSHIPS BETWEEN BIRD DENSITIES AND DISTANCE TO MINES IN NORTHERN CANADA A Thesis Submitted to the Committee of Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science In the Faculty of Arts and Science TRENT …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Fournier, Cory, Thesis advisor (ths): Manseau, Micheline, Thesis advisor (ths): Wilson, Paul, Degree committee member (dgc): Manseau, Micheline, Degree committee member (dgc): Wilson, Paul, Degree committee member (dgc): Simmons, Deborah, Degree granting institution (dgg): Trent University Abstract: <p>Understanding genetic structure, connectivity, and movement of a species iscritical to management and conservation. Genetic network approaches allow the analysis
of genetic information with flexibility and few prior assumptions. In chapter one, I tested
the ability of individual-based genetic networks to detect fine-scale structure and
connectivity in relation to sampling efforts. My… more Full Text: GENETIC NETWORKS TO INVESTIGATE STRUCTURE AND CONNECTIVITY OF CARIBOU AT MULTIPLE SPATIAL AND TEMPORAL SCALES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): DeBues, Max, Thesis advisor (ths): Eimers, Catherine, Degree committee member (dgc): Watmough, Shaun, Degree committee member (dgc): Mohamed, Mohamed, Degree committee member (dgc): Mueller, Jessica, Degree granting institution (dgg): Trent University Abstract: <p>Row crop agriculture and associated land use practices including tile drainage and conservation tillage have been cited as a probable cause of re-emerging eutrophication in the
lower Great Lakes. In this thesis, I sought to quantify and evaluate the effect of agricultural land
cover and land use changes on total phosphorus (TP) and nitrate-nitrogen (NO3-N)
concentrations and export in… more Full Text: THE EFFECTS OF AGRICULTURAL LAND USE CHANGE ON NITROGEN AND PHOSPHORUS IN NORTH SHORE LAKE ONTARIO TRIBUTARIES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Amino acids make up proteins, which are the building blocks of life. A balance of amino acids is needed to maintain a healthy state. Tyrosine (Tyr) is synthesized from the metabolism of phenylalanine, which is an essential amino acid, meaning it can only be obtained from the diet. It is related to many metabolic and neurodegenerative diseases. Tyr can undergo post-translational… more Full Text: USING FLUORESCENT CARBON DOTS FOR BIOSENSING APPLICATIONS OF AMINO ACIDS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master Science in the Faculty of Arts and Science TRENT …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Lake whitefish (Coregonus clupeaformis) recruitment has declined substantially in several regions of the Laurentian Great Lakes since the establishment of non-native dreissenid mussels in the early 1990's. In Lake Huron, the reasons for the observed recruitment declines are currently unknown and there is limited knowledge about larval life stage. In our study, we determined whether… more Full Text: Larval lake whitefish (Coregonus clupeaformis) recruitment dynamics in Lake Huron A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Jenkins, Deborah A., Thesis advisor (ths): Schaefer, James A, Thesis advisor (ths): Lecomte, Nicolas, Degree committee member (dgc): Conolly, James, Degree committee member (dgc): Ray, Justina, Degree granting institution (dgg): Trent University Abstract: <p>Central to wildlife conservation and management is the need for refined, spatially explicit knowledge on the diversity and distribution of species and the factors that drive those patterns. This is especially vital as anthropogenic disturbance threatens rapid large-scale change, even in the most remote areas of the planet. My dissertation examines theinfluence of land- and sea-scape… more Full Text: ISLANDS, UNGULATES, AND ICE: THE RESPONSE OF CARIBOU TO A CHANGING ENVIRONMENT A Dissertation Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Organismal nutrition lies at the interface between biotic and abiotic factors in an ecosystem, dictating the transfer of energy and nutrients across trophic levels. Our ability to detect nutritional limitation in consumers is reliant on a priori knowledge of dietary history due to our inability to differentiate nutrient stress based on body-wide responses. Molecular physiological… more Full Text: NUTRIGENOMICS OF DAPHNIA: EXAMINING EFFECTS OF NUTRIENTS ON THE DAPHNIA PULEX TRANSCRIPTOME AND IDENTIFYING NUTRITIONAL PHENOTYPES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirement for the Degree of Doctor …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Katanda, Yeukai, Thesis advisor (ths): Hutchinson, Tom, Thesis advisor (ths): Thompson, Karen, Degree committee member (dgc): Sharifi, Mehdi, Degree committee member (dgc): Van Eerd, Laura, Degree committee member (dgc): Hooker, David, Degree granting institution (dgg): Trent University Abstract: <p>Ontario grain corn is highly valuable, accounting for 60% of Canada's total corn output. Grain producers are increasingly interested in including cover crops (CCs) in their cropping systems, but they have concerns regarding successful CC establishment and potential adverse competitive effects on corn yield and nutrient status. One option to improve the success of CC establishment is… more Full Text: INTERSEEDED COVER CROPS IN ONTARIO GRAIN CORN SYSTEMS: POTENTIAL IMPLICATIONS FOR CORN NITROGEN UPTAKE, SOIL HEALTH, AND RESIDUE DECOMPOSITION A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>190 species of birds are known to breed in Ontario's far north making the region an important nursery for boreal birds. Digital point count data were collected using two different autonomous recording units (ARUs): one model with two standard microphones to detect birds and anurans, and one model with one standard microphone and one ultrasonic microphone for detecting bats. ARUs… more Full Text: DETERMINANTS OF BREEDING BIRD DIVERSITY IN ONTARIO’S FAR NORTH A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Roosts offer bats protection from predators, shelter from external environmental conditions, and a space where sociality, mating, and the rearing of young can occur. However, knowledge gaps still remain for many forest roosting species, such as the little brown bat (Myotis lucifugus) surrounding what roosts are selected, and what variables are influential at differing scales of selection… more Full Text: Forest Roost Use by Little Brown Bats (Myotis lucifugus) in Ontario A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Kennedy , Victoria, Thesis advisor (ths): Saville, Barry, Degree committee member (dgc): Emery, Neil, Degree committee member (dgc): Donaldson, Michael, Degree committee member (dgc): Farrow, Scott, Degree granting institution (dgg): Trent University Abstract: <p>Heavy metal pollution threatens human and ecosystem health. E. gracilis was investigated for its potential use in bioremediation due to its tolerance for heavy metals and ability to sequester them from the environment. E. gracilis can remove metals by producing metal binding compounds enriched in sulfur and nitrogen. In this thesis, E. gracilis cultures that were pretreated with elevated… more Full Text: The influence of sulfur and nitrogen on cadmium tolerance in Euglena gracilis: an RNA-sequencing investigation A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>During the COVID-19 pandemic, nucleic acid and antibody-based testing methods were heavily relied upon, but can be costly, time-consuming and exhibit high false -negative and -positive rates. Thus, alternative strategies are needed. Viral antigens such as the SARS-CoV-2 spike (S) glycoprotein are critical in the function of the virus and useful as diagnostic biomarkers for viral… more Full Text: SARS-CoV-2 PROTEIN-BASED DETECTION USING LOCALIZED SURFACE PLASMON RESONANCE A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Rapidly changing landscapes introduce challenges for wildlife management, particularly for large mammal populations with long generation times and extensive spatial requirements. Understanding how these populations interact with heterogeneous landscapes aids in predicting responses to further environmental change. In this thesis, I profile American black bears using microsatellite loci… more Full Text: Gene flow directionality and functional genetic variation among Ontario, Canada Ursus americanus populations. A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Vanderwolf, Karen J, Thesis advisor (ths): Davy, Christina, Thesis advisor (ths): Kyle, Christopher, Degree committee member (dgc): Donaldson, Michael, Degree committee member (dgc): McAlpine, Donald, Degree granting institution (dgg): Trent University Abstract: <p>White-nose syndrome (WNS) is a skin disease of bats caused by the fungus Pseudogymnoascus destructans (Pd) that damages flight membranes during hibernation and can lead to death. The disease causes mortality of multiple bat species in eastern North America and is spreading into western North America. Future impacts of WNS on naïve bat populations are unknown. Variation in host… more Full Text: THE MYCOBIOME AND SKIN CHEMISTRY OF BAT WINGS IN RELATION TO WHITE-NOSE SYNDROME A dissertation submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the faculty of Arts and …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The neuronal ceroid lipofuscinoses (NCLs), commonly known as Batten disease, are a family of inherited neurodegenerative lysosomal storage disorders. CLN7 disease is a subtype of NCL that is caused by mutations in the MFSD8 gene. MFSD8 encodes a lysosomal transmembrane protein that is predicted to play a role in transporting small substrates across membranes. However, little is known… more Full Text: Mfsd8 regulates growth and multicellular development in Dictyostelium discoideum A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): McFarlane, Samantha Amy, Thesis advisor (ths): Wilson, Paul J, Thesis advisor (ths): Manseau, Micheline, Degree committee member (dgc): Bowman, Jeff, Degree committee member (dgc): Steenweg, Robin, Degree granting institution (dgg): Trent University Abstract: <p>Variation in habitat quality and disturbance levels can strongly influence a species' distribution, leading to spatial variation in population density and influencing population dynamics. It is therefore critical to understand how density can lead to variability in demographic responses for effective conservation and recovery of species. My dissertation illustrates how density and… more Full Text: LANDSCAPE FITNESS: INTEGRATING DENSITY, FAMILIAL NETWORKS AND POPULATION DYNAMICS FOR THE CONSERVATION OF BOREAL WOODLAND CARIBOU A dissertation submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Maximum permitted SO2 emissions from an aluminum smelter in Kitimat, B.C., increased after modernization in 2015. An increase in acidic deposition can potentially acidify forest soils. Monitoring was conducted at two long-term soil monitoring plots at near (7 km) and far (41 km) sites downwind from the smelter. Change in soil properties was assessed between 2015 and 2018: for the near… more Full Text: THE SENSITIVITY OF FOREST SOILS TO ACIDIC DEPOSITION DOWNWIND OF AN ALUMINUM SMELTER, KITIMAT, B.C. A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Mining and resource development are growing industries in the Arctic, resulting in increased conflict with wildlife. Best practices for mitigation require an understanding of the potential ecological effects. One such effect concerns the flooding of terrestrial bird habitat from dewatering of lakes during mining pit development. I first assessed the efficacy of bird deterrents to… more Full Text: ASSESSING AND MITIGATING THE IMPACTS OF MINING-INDUCED FLOODING ON ARCTIC-NESTING BIRDS A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Similar to other shorebird trends around the world, the Piping Plover population (Charadrius melodus circumcinctus) is projected to decline if concerted conservation efforts are relaxed. To date, there is insufficient understanding of the connection between habitat type, prey abundance, and chick behaviour of the Piping Plover breeding population in Ontario. The aim of my thesis was to… more Full Text: PREY ABUNDANCE AND HABITAT DURING THE BREEDING SEASON FOR PIPING PLOVERS IN THE ONTARIO GREAT LAKES REGION A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Line transect sampling and photographic-identification (photo-ID) are common survey techniques for estimating the abundance and distribution of cetaceans. Combining these approaches in the field ('combined LTPI' surveys) and using data from both components has the potential for generating comprehensive ecological knowledge that can be far more valuable than when these… more Full Text: COMBINING LINE TRANSECT SAMPLING AND PHOTOGRAPHICIDENTIFICATION SURVEYS TO INVESTIGATE THE ABUNDANCE AND DISTRIBUTION OF CETACEANS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Owen Sound Bay, which is located within the traditional territory of the Saugeen Ojibway Nation (SON), is contaminated as a result of historical industrial and shipping activity. Gross contamination of the sediments in the inner part of the Bay (i.e., Owen Sound Harbour) includes high concentrations of polycyclic aromatic hydrocarbons (PAHs) and other organic compounds, as well as metals… more Full Text: A collaborative ecotoxicological risk assessment of in-place pollutants in Owen Sound Bay, Lake Huron within the Saugeen Ojibway Nation Territory A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In order to effectively manage recreational fisheries, it is important to understand how the resource is being used. In this thesis, long-term creel census data, collected on Lake Opeongo in Algonquin Provincial Park, Ontario, Canada was used to assess fine-scale angler dynamics within a recreational Lake Trout (Salvelinus namaycush) fishery. The spatial distribution of angler reported… more Full Text: Understanding Angler Dynamics in a Recreational Lake Trout (Salvelinus namaycush) Fishery in Algonquin Provincial Park Using Long-Term Access Creel Data A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Phytohormones, Cytokinin (CK) and Abscisic acid (ABA), are best known for controlling plant growth and stress responses; but they also mediate various developmental perspectives in alga. Yet, their mode of action in algal adaptive strategies to heavy metal responses, their involvement in orchestration of phytohormone crosstalk remain largely unknown and a molecular framework of… more Full Text: Phytohormone-enhanced heavy metal responses in Euglena gracilis: Ni, Pb and Cd uptake and associated hormone and metabolome profiles A thesis submitted to the committee on Graduate Studies in partial fulfillment of the requirements for the degree of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): McDonough, Andrew Michael, Thesis advisor (ths): Watmough, Shaun A, Degree committee member (dgc): Aherne, Julian, Degree committee member (dgc): Hutchinson, Tom, Degree committee member (dgc): Sager, Eric, Degree granting institution (dgg): Trent University Abstract: <p>In this study we seek to better understand the potential effects of short-term (5-year) N fertilization on jack pine forest biogeochemistry, vascular plant community composition and to project a temporal endpoint of nitrogen leaching below the major rooting zone. Aqueous ammonium nitrate (NH4NO3) was applied above the forest canopy across five treatment plots (20 x 80 m) four times… more Full Text: Ecosystem Response to Above Canopy Nitrogen Addition in a Jack Pine (Pinus banksiana) Forest in the Athabasca Bituminous Sands Region of Northeastern Alberta, Canada A Thesis Submitted to the Committee on Graduate Studies in the Partial Fulfilment of the …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Decades of acidic deposition have depleted base cation pools in soil over large parts of eastern north America, including the Muskoka-Haliburton region of central Ontario. This region has also experienced a shift in forest species composition over the past 200 years, favouring sugar maple (Acer saccharum Marsh.) at the expense of species such as white pine (Pinus strobus L.) and eastern… more Full Text: The influence of tree species litterfall on soil chemistry and implications for modelling soil recovery from acidification A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In Canada, eastern flowering dogwood (Cornus florida L.) is an endangered tree that occurs only in the Carolinian forest of southern Ontario. Threats to this species include habitat fragmentation and the fungal pathogen dogwood anthracnose (Discula destructiva). I conducted a population genetic analysis using seven nuclear microsatellite markers to determine if fragmented populations are… more Full Text: THE ASSESSMENT OF POTENTIAL THREATS TO EASTERN FLOWERING DOGWOOD (CORNUS FLORIDA) IN SOUTHERN ONTARIO A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Lake of the Woods (LOW) is a large international waterbody which suffers from frequent and widespread algae blooms. Previous studies have highlighted the importance of the lake's largest tributary, the Rainy River (RR) and its significance in total phosphorus (TP) delivery to the LOW. Unfortunately, little is known about TP contributions from the RR and its tributaries within the… more Full Text: Phosphorus delivery in the Rainy-River Lake of the Woods Watershed A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree Master of Science in the Faculty of Arts and Science Trent University …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The length of photoperiod can alter circadian rhythms and change fat depot mass whencombined with environmental temperatures below thermoneutral. To isolate photoperiod effects, we compared the effects of long and short photoperiod exposure at thermoneutrality in photoperiod sensitive, F1 generation adult male white-footed mice (P. leucopus). Mice were housed in long-day or short-day… more Full Text: Short photoperiod lowers visceral adiposity and shifts the molecular clock in Peromyscus leucopus A Thesis Submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the faculty of Arts …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Peatlands can be found widely across all latitudes and play a significant role in global cycles within the earth's biosphere. The anoxic conditions in peatlands promotes the accumulation of organic matter through decreased rates of decomposition and the storage of certain elements, which have received contaminant loading over the course of human existence, with significant increases… more Full Text: Trace Metal Geochemistry of Peatlands A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY Peterborough, Ontario, Canada …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Assessments of the adaptive potential of natural populations are essential for understanding and predicting responses to environmental stressors like climate change and infectious disease. The range of stressors species face in a human-dominated landscape, often have contrasting effects. White-tailed deer (Odocoileus virginianus, deer) are expanding in the northern part of their range… more Full Text: Characterizing the demographic history and prion protein gene variation to infer susceptibility to chronic wasting disease in a naïve population of white-tailed deer (Odocoileus virginianus) A Thesis Submitted to the Committee on Graduate Studies in …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>As wild turkeys (Meleagris gallopavo silvestris) move farther north, informed management decisions are critical to support the sustainability of this reintroduced species. We tracked roost tree selection and patterns of the network of roost trees, for wild turkeys, over 2 years in Peterborough, ON, using GPS and VHF transmitters. Wild turkeys showed preference for taller and larger roost… more Full Text: ROOSTING SELECTION BEHAVIOUR OF THE EASTERN WILD TURKEY AT ITS NORTHERN RANGE EDGE A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
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 Full Text: Monitoring and fate of selected tire-derived organic contaminants A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Grich, Nourhene, Thesis advisor (ths): Emery, Neil NE, Degree committee member (dgc): Saville, Barry BS, Degree committee member (dgc): Morrison, Erin EM, Degree committee member (dgc): Donaldson, Michael MD, Degree granting institution (dgg): Trent University Abstract: <p>The oyster mushroom, Pleurotus ostreatus, is one of the most widely cultivated edible basidiomycetes. It has gained increased attention for its economic, environmental, and medicinal properties. While a lot is known about cytokinins (CKs) and their actions at the molecular and cellular levels in plants, much less is known about the function of CKs in other kingdoms. Cytokinins, which… more Full Text: BIOSYNTHESIS AND IMPACT OF CYTOKININS ON GROWTH OF THE OYSTER MUSHROOM, Pleurotus ostreatus A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirement for the Degree of Master of Science In the Faculty of Arts and …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Euglena gracilis is an enigmatic and adaptable organism that has great bioremediationpotential and is best known for its metabolic flexibility. The research done in this
dissertation addresses (1) how growth conditions impact cellular composition, and (2)
how chemometric approaches (such as statistical design of experiments and artificial
neural networks) are viable alternatives to the… more Full Text: Using ultra high-resolution mass spectrometry to characterize the biosorbent Euglena gracilis and its application to dysprosium biosorption A dissertation submitted to the Committee of Graduate Studies in partial fulfillment of the requirements of the …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Hudson Bay region is a sensitive environment, where anthropogenic (e.g., dams, diversions, and/or reservoirs) impacts have increased in recent decades, potentially influencing the functioning of the ecosystem. Dissolved organic matter (DOM) entering Hudson Bay comes from both terrestrial (allochthonous) and aquatic (autochthonous) sources. The chemical composition of DOM is important… more Full Text: Composition and Transformation of Dissolved Organic Matter in Hudson Bay, Canada A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and Science …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Fleming, Kaitlyn Julia, Thesis advisor (ths): Beresford, David V, Thesis advisor (ths): Schaefer, James A, Degree committee member (dgc): Smith, M. Alex, Degree committee member (dgc): Abraham, Kenneth F, Degree granting institution (dgg): Trent University Abstract: <p>Basic biogeographic information is lacking for many species, such as where species are found, and how they dispersed there. Using ground beetles collected during 2008-2015 from across northern Ontario and Akimiski Island, Nunavut, I present new information on ground beetle distribution in this eastern Nearctic boreal forest, including 2 first Canadian records, 9 first provincial and 48… more Full Text: Biogeography of Carabidae (Coleoptera) in the Boreal Forest A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment for the Degree of Doctor of Philosophy in the Faculty of Arts and Science TRENT UNIVERSITY Peterborough, Ontario, …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Opioid drugs are among the microcontaminants that are discharged with domestic wastewater into the aquatic environment with the potential to affect the development and reproductive capacity of aquatic organisms. To study the effects of exposure of fish to opioid drugs, Japanese medaka (Oryzias latipes) were exposed over a full life cycle to environmentally relevant (i.e. ng/L)… more Full Text: Effects of Opioids on the Development and Reproductive Capacity of Japanese Medaka, Oryzias latipes A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The emergence of fungal hybrid pathogens threatens sustainable crop production worldwide. To investigate hybridization, the related smut fungi, Ustilago maydis and Sporisorium reilianum, were selected because they infect a common host (Zea mays), can hybridize, and tools are available for their analysis. Hybrid dikaryons exhibited filamentous growth on plates but reduced virulence and… more Full Text: Fungal pathogen emergence: an Ustilago maydis x Sporisorium reilianum model A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science in the faculty of Arts and Science TRENT …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Transactive response (TAR) DNA-binding protein of 43 kDa (TDP-43) pathology, including fibrillar aggregates and mutations, develops in amyotrophic lateral sclerosis (ALS) and is characterized by hyperphosphorylation and aggregation patterns, a mechanism largely understudied. In addition, ALS remains without a cure. Herein, in vitro aggregation of phosphorylated TDP-43 was explored, and… more Full Text: IMMUNOTHERAPIES TARGETING THE AMYOTROPHIC LATERAL SCLEROSIS-ASSOCIATED PROTEIN TDP-43 A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The integration of genetic and environmental information can help wildlife managers better understand the factors affecting a species' population structure and their response to disturbance. This thesis uses genetic techniques to assess the broad and fine scale population structure of mountain goats in Alaska. The first chapter aims to determine the number of genetically distinct… more Full Text: THE EVOLUTIONARY ECOLOGY OF ALASKA’S MOUNTAIN GOATS WITH MANAGEMENT IMPLICATIONS A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Genetic variation is the raw material and basis for evolutionary changes in nature. The loss of genetic diversity is a challenge many species are facing, with genomics being a potential tool to inform and prioritize decision making. Whole genome analysis can be an asset to conservation biology and the management of species through the generation of more precise and novel metrics. This… more Full Text: DEMOGRAPHIC HISTORY AND CONSERVATION GENOMICS OF CARIBOU (RANGIFER TARANDUS) IN QUÉBEC A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Bhargav, V Vikram, Thesis advisor (ths): Dorken, Marcel MD, Thesis advisor (ths): Freeland, Joanna JF, Degree committee member (dgc): Bowman, Jeff JB, Degree committee member (dgc): Shafer, Aaron AS, Degree granting institution (dgg): Trent University Abstract: <p>Heterosis, expressed as phenotypic superiority over parental species, typically peaks in first generation hybrids (F1s), while later generations (F2 +) exhibit lower fitness. The decrease in hybrid fitness is called hybrid breakdown. The overall incidence of hybrid breakdown in invasive hybrid zones remains poorly understood. The Laurentian Great Lakes (LGL) region contains a hybrid zone… more Full Text: EVIDENCE FOR HYBRID BREAKDOWN IN THE CATTAIL (TYPHA) HYBRID SWARM IN SOUTHERN ONTARIO A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The influence of stress exposure on the body temperature of vertebrates has been known for nearly two-thousand years. While the proximate mechanisms supporting this phenomenon are well described, the ultimate mechanisms remain enigmatic. In this thesis, I propose a novel hypothesis which states that changes in body surface temperature (henceforth "surface temperature")… more Full Text: SURFACE TEMPERATURE REGULATION DURING STRESS EXPOSURE: EVIDENCE OF A TRADE-OFF BETWEEN THERMOREGULATION AND THE PHYSIOLOGICAL STRESS RESPONSE IN BIRDS A Dissertation Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements …
