Trent University Graduate Thesis Collection

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    Copyright for all items in the Trent University Graduate Thesis Collection is held by the author, with all rights reserved, unless otherwise noted.
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    Genomic Signatures of Speciation in Sympatric Flying Squirrels

    Year: 2024, 2024
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): Menelon, Laurelie, Thesis advisor (ths): Bowman, Jeff, Thesis advisor (ths): Wilson, Paul, Degree committee member (dgc): Shafer, Aaron, Degree granting institution (dgg): Trent University
    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

    The effects of heat dissipation capacity on avian physiology and behaviour

    Year: 2021, 2021
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): Tapper, Simon, Thesis advisor (ths): Burness, Gary, Thesis advisor (ths): Nocera, Joseph J, Degree committee member (dgc): Shafer, Aaron, Degree granting institution (dgg): Trent University
    Abstract: <p>In endotherms, physiological functioning is optimized within a narrow range of tissue temperatures, meaning that the capacity to dissipate body heat is an important parameter for thermoregulation and organismal performance. Yet, experimental research has found mixed support for the importance of heat dissipation capacity as a constraint on reproductive performance. To investigate the… more

    Assessing the Cost of Reproduction between Male and Female Sex Functions in Hermaphroditic Plants

    Year: 2021, 2021
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): West, Catherine Lorraine, Thesis advisor (ths): Dorken, Marcel, Degree committee member (dgc): Shafer, Aaron, Degree committee member (dgc): Friedman, Jannice, Degree granting institution (dgg): Trent University
    Abstract: <p> The cost of reproduction refers to the use of resources for the production of offspring that decreases the availability of resources for future reproductive events and other biological processes. Models of sex-allocation provide insights into optimal patterns of resource investment in male and female sex functions and have been extended to include other components of the life history,… more

    Daphnia pulicaria responses to temperature and nutrients stress: what happens when the heat is on?

    Year: 2020, 2020
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): Starke, Cody, Thesis advisor (ths): Frost, Paul C, Degree committee member (dgc): Shafer, Aaron, Degree committee member (dgc): Paterson, Michael, Degree granting institution (dgg): Trent University
    Abstract: <p>Warming climates have had various consequences on terrestrial and aquatic food webs that are expected to persist. There is evidence suggesting that certain organisms are better equipped to handle changing climates compared to others. Therefore, the purpose of my thesis was to study the adaptability of Daphnia under temperature stress and nutrient limitation. First, to examine the effects… more

    Complex niche determinants in terrestrial salamanders: Does hybridism or reproductive parasitism explain large-scale patterns of distribution?

    Year: 2018, 2018
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): Mills, Peter, Thesis advisor (ths): Murray, Dennis, Degree committee member (dgc): Davy, Christina, Degree committee member (dgc): Shafer, Aaron, Degree granting institution (dgg): Trent University
    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

    Using environmental DNA (eDNA) metabarcoding to assess aquatic plant communities

    Year: 2018, 2018
    Member of: Trent University Graduate Thesis Collection
    Name(s): Creator (cre): Coghlan, Stephanie, Thesis advisor (ths): Freeland, Joanna, Thesis advisor (ths): Shafer, Aaron, Degree committee member (dgc): McConnell, Sabine, Degree granting institution (dgg): Trent University
    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