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 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 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 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 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 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 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 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 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 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 Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Estimation of population abundance from samples has inherent practical challenges. Moreover, analytical methods to estimate abundance may vary in statistical assumptions and prediction uncertainties. I evaluated the performance of design-based and model-based methods to estimate Canada geese (Branta canadensis) abundance based on aerial fixed-width transect surveys in the Hudson Bay… more 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 Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Cytokinins (CKs) are adenine derivative molecules that are present in all kingdoms of life. CKs are known to have a role in cell growth and development in plants. However, the role of CKs in vertebrate systems is not well understood. Frog virus 3 (FV3) is a type species of the Iridioviridae family, genus Ranavirus. FV3 is a major contributor to the amphibian population decline in North… more Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Wildlife translocation programs are widely employed as a strategy to reintroduce extirpated species into regions they once inhabited but no longer do. Reintroduction programs can be successful at re-establishing extirpated populations and also provide unique opportunities to study post-reintroduction population dynamics and behavioural ecology. The wild turkey (Meleagris gallopavo) is a… more 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 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 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 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 Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Arctic breeding shorebirds are often considered alternate or secondary prey to avian and terrestrial predators that primarily feed on cyclic populations of rodents. Predation risk can strongly influence habitat selection; however, there is limited understanding of how nest placement by shorebirds and subsequent risk of nest predation are affected by spatiotemporal patterns involving the… more
