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 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 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 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 Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Soil and tree chemistry were measured across 15 limed sites that were established 14 to 37 years ago within the Sudbury barrens in Ontario, along with two unlimed pre-treatment condition reference sites and an unlimed remnant pine forest. Soil pH and base cation (calcium (Ca), magnesium (Mg), and potassium (K)) concentrations were elevated in surface organic [FH] horizons up to 37-years… more 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 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 Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Johannessen, Cassandra, Thesis advisor (ths): Metcalfe, Chris D, Thesis advisor (ths): Parnis, J. Mark, Degree committee member (dgc): Metcalfe, Chris D, Degree committee member (dgc): Parnis, J. Mark, Degree committee member (dgc): Dang, Huy, Degree committee member (dgc): Hickie, Brendan, Degree granting institution (dgg): Trent University Abstract: <p>Road runoff is a vector for the transport of potentially toxic chemicals into receiving waters. In this study, selected tire-derived chemicals were monitored in surface waters of rivers adjacent to two high traffic highways in the Greater Toronto Area in Ontario, Canada. Composite samples were collected from the Don River and Highland Creek in the GTA during 5 hydrological events that… more Year: 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 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 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 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 Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis examines how dissolved organic matter quantity and quality and nutrients influence the flux potential of greenhouse gases (GHG) from sediments collected from streams across southern Ontario as well as Lake Erie. Sediments were collected and incubated in a laboratory setting where headspace gases and interstitial waters were analyzed. Results demonstrated that nutrients (… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Forensic epistemology is the study of knowledge as it relates to forensic science and can be broken into four sources; intuitive, authoritative, logical and empirical. In a four-phase research approach, I explored reasoning skills (logical knowledge) used by crime scene experts and methods (empirical knowledge) for forensic case-specific experimentation. First, the reasoning skills of… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The waterborne protozoan Giardia intestinalis cycles between the environmentally-resistant and infectious cyst and the metabolically-active trophozoite that adheres to the epithelial lining of the small intestine. Adhesion can trigger the innate immune response in epithelial cells, including the synthesis of the free radical nitric oxide (NO) that inhibits cell proliferation and… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Brook trout (Salvelinus fontinalis) are declining across Ontario in both numbers and distribution, prompting concern for their future. Here, conventional, emerging, and predictive tools were combined to document brook trout occupation across seasons using streams in Haliburton County, ON as model systems. By using the Ontario Ministry of Natural Resources and Forestry's (OMNRFs)… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Radionuclides occur in the environment both naturally and artificially. Along with weapons testing and nuclear reactor operations, activities such as mining, fuel fabrication and fuel reprocessing are also major contributors to nuclear waste in the environment. In terms of nuclear safety, the concentration of radionuclides in nuclear waste must be monitored and reported before storage… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Mafic and ultramafic mine wastes have the potential to sequester atmospheric carbon dioxide (CO2) through enhanced weathering and CO2 mineralization. In this study, kimberlite residues from South African diamond mines were investigated to understand how weathering of these wastes leads to the formation of secondary carbonate minerals, a stable sink for CO2. Residues from Venetia Diamond… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Natural populations are often difficult and costly to study, due to the plethora of confounding processes and variables present. This is of particular importance when dealing with managed species. Ungulates, for example, act as both consumers and prey sources; they also provide economic benefit through harvest, and as such, are of high ecological and economic value. I addressed… more Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis investigated coloured and fluorescent dissolved organic matter in the Canada Basin, Arctic Ocean from 2007 to 2017. The first interannual time-series of its kind in the Canada Basin incorporated the use of EEM-PARAFAC to validate a seven-component model. Statistical temporal tests revealed (1) an increasing protein-like intensity in the upper polar mixed layer (UPML); (2)… more
