Year: 2018, 2018
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): Eimers, Catherine, Degree committee member (dgc): Whitfield, Colin, Degree granting institution (dgg): Trent University Abstract: <p>In 2012, the Rio Tinto aluminum smelter in Kitimat, British Columbia increased sulphur dioxide (SO2) emissions from 27 to 42 tonnes/day. An initial study was conducted to investigate the effect of the increased sulphur (S) deposition on forest soils. A key uncertainty of the initial study was mineral surface area estimations that were applied to critical load calculations. The current… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Microalgae are a promising source of valuable compounds relevant to biofuels, biomaterials, nutraceuticals as well as animal and human nutriment. Unfortunately, low cell density and slow growth result in reduced economic feasibility. Heterotrophic cell culturing using an organic carbon source in lieu of light has proven to be an effective alternative to photobioreactors; however, further… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Introgressive hybridization between northern (Glaucomys sabrinus) and southern flying squirrels (G. volans) has been observed in some areas of Canada and the USA. However, existing molecular markers lack the resolution to discriminate late-generation introgressants and describe the extent to which hybridization influences the Glaucomys gene pool. I report the first North American flying… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Cowden, Phaedra, Thesis advisor (ths): Aherne, Julian, Degree committee member (dgc): Watmough, Shaun, Degree committee member (dgc): Sager, Eric, Degree committee member (dgc): Canners, Richard, Degree granting institution (dgg): Trent University Abstract: <p>Atmospheric pollutant deposition poses a risk to ecosystem health; therefore, monitoring the spatial and temporal trends of deposition is integral to environmental sustainability. Although moss biomonitoring is a common method to monitor various pollutants in Europe, offering a cost-effective approach compared to traditional methods of monitoring, it is rarely used in Canada. The focus… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Understanding the maintenance and spread of invasive diseases is critical in evaluating threats to biodiversity and how to best minimize their impact, which can by done by monitoring disease occurrences across time and space. I sought to apply existing and upcoming molecular tools to assess fluctuations in both presence and strain variation of frog virus 3 (FV3), a species of Ranavirus,… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The growth of immature insects that develop on human remains can be used to estimate a post-mortem interval (PMI). PMI estimate confidence is negatively affected by: larval killing and preservation methods altering their size, limited morphological parameters to assess larval growth and therefore age, and few available alternate species development data. I compared live specimens to… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Athabasca Oil Sands in Alberta, Canada is one of the largest point sources emitters of NOx in Canada and there</p><p>are concerns that elevated nitrogen (N) deposition will lead to widespread eutrophication impacts, including altered</p><p>species composition, similar to what has occurred in several parts of Europe. Atmospheric deposition rates as high as</… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Hunting represents the principal tool for managing populations of migratory caribou (Rangifer tarandus), but harvest may be affected by landscape features that govern animal distribution and hunter access. Such effects are unclear. I capitalized on an existing dataset of 21 355 caribou harvest records, 1980 – 2009, to determine the influence of landscape features on caribou harvest… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I assessed how organisms having multiple biotic attributes may have conflicting niche determinants, and whether the realized niche reflects single or multiple attributes. All-female salamanders engage in two biotic states: hybridism and reproductive parasitism. Hybrids should occupy areas transitional to those used by parental species, whereas parasites that engage in competition with… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Threats such as climate change and increased anthropogenic activity such as shipping, are expected to negatively affect the Arctic. Lack of data on Arctic systems restricts our current understanding of these sensitive systems and limits our ability to predict future impacts. Lakes and ponds are a major feature of the Arctic landscape and are recognized as 'sentinels of change… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Kentucky coffee tree (Gymnocladus dioicus) is an endangered tree species native to the American Midwest and Southwestern Ontario. Significant habitat loss and fragmentation due to agricultural, industrial and urban development has caused gradual decline across its native range. The aims of this study were to investigate: (1) patterns of genetic diversity and, (2) genetic… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Aeolian transport of sand particles is an important geomorphic process that occurs over a significant portion of the earth's land surface. Wind tunnel simulations have been used for more than 75 years to advance the understanding of this process; however, there are still several principles that lack validation from direct sampling of the sand particles in flight. Neither the three-… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Chemical presumptive tests are used as the primary detection method for latent bloodstain evidence. This work focuses on developing a forensic blood substitute which mimics whole blood reactivity to a luminol solution commonly used in presumptive testing. Designing safe and accessible materials that mimic relevant properties of blood is a recognized research need in forensic science.… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Numerous prey taxa employ defensive postures for protection against attack by predators. Defensive postures mitigate predation risk at various stages of the predator-prey sequence, including through crypsis, mimicry, thanatosis, aposematism, and deflection. In terrestrial salamanders, defensive postures may be aposematic, or deflect attacks away from vital body parts and towards the tail… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Salamanders are capable of tissue regeneration throughout all life-stages, which requires the dedifferentiation of mature cells to regrow lost tissues. Dedifferentiation is promoted by degradation of the extracellular matrix by matrix metalloproteases, as well as lysosomal degradation of intracellular and cell-surface proteins that mark cells as part of a mature lineage. Salamanders are… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Neuroblastoma (NB) has one of the highest mortality rates in pediatric oncology due to relapsed and refractory disease. Current aggressive multi-modal treatments are inhibited by dose-limiting toxicities and are associated with late-effects and secondary malignancies, emphasizing the necessity for novel therapeutics. Uniquely, most NB cells highly express disialoganglioside (GD2) a cell… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Samkari, Bshayer A, Thesis advisor (ths): Beresford, David, Degree committee member (dgc): Hutchinson, Tom, Degree committee member (dgc): Sager, Eric, Degree committee member (dgc): Davy, Christina, Degree granting institution (dgg): Trent University Abstract: <p>This thesis looks at the genus Pollenia: historically where they were first introduced into Canada and spatially, where they are found now. This project involved me identifying 2211 files, sorted from the 3 years of field specimens obtained in 2011, 2012, 2013. P. pediculata was the most abundant and widespread, yielding 1272 specimens out of 2211, and it was found in all provinces… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Soluble uranium (U) has been observed continuously in the porewaters of Bentley Lake,</p><p>a lake with semi-permanent anoxic sediments, despite the fact that reduced U(IV) is known to be</p><p>insoluble. To be able to predict the fate and mobility of U that has been deposited in lake</p><p>sediments, it is very important to understand the factors that… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Environmental DNA (eDNA) metabarcoding targets sequences with interspecific</p><p>variation that can be amplified using universal primers allowing simultaneous detection</p><p>of multiple species from environmental samples. I developed novel primers for three</p><p>barcodes commonly used to identify plant species, and compared amplification success… more Year: 2018, 2018
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The potential impacts of domestic wastewater (DWW) on the source of drinking water for the M'Chigeeng First Nation were monitored as part of the development of a Source Water Protection plan. During a period of continuous overflow of the Gaaming Wastewater Lagoon serving the community, the chemical tracers, caffeine and sucralose were tracked in West Bay with Passive Organic… more
