Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Interspecific hybridization rates can vary depending on genomic compatibilities between progenitors, while subsequent hybrid spread can vary depending on hybrid performance and habitat availability for hybrid establishment and persistence. As a result, hybridization rates and hybrid frequencies can vary across regions of parental sympatry. In areas around the Laurentian Great Lakes,… 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: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Population density regulation is a fundamental principle in ecology, however there remain several unknowns regarding the functional expression of density dependence. One prominent view is that the patterns by which density dependence is expressed are largely fixed across a species, irrespective of environmental conditions. Our study investigated the expression of density dependence in… more Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Lin, Shang-Yao Peter, Thesis advisor (ths): Dorken, Marcel E, Thesis advisor (ths): Nol, Erica, Degree committee member (dgc): Crins, William J, Degree committee member (dgc): Freeland, Joanna R, Degree granting institution (dgg): Trent University Abstract: <p>Sexual reproduction in flowering plants depends on investment in reproduction, the mode of pollen transfer, the availabilities of nutrient resources and potential mates, and the spatial scales over which these processes take place. In this thesis, I studied the general reproductive biology of Shepherdia canadensis (L.) Nutt. (Elaeagnaceae) and the suite of pollinators that visit the… more Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The structure and composition of the landscape can facilitate or impede gene flow, which can have important consequences because genetically isolated groups of individuals may be prone to inbreeding depression and possible extinction. My dissertation examines how landscape structure influences spatial patterns of genetic differentiation and diversity of American marten (<italic>… more Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Ahee, Jordan, Thesis advisor (ths): Dorken, Marcel E, Degree committee member (dgc): Freeland, Joanna R, Degree committee member (dgc): Burness, Gary, Degree committee member (dgc): Pond, Bruce, Degree granting institution (dgg): Trent University Abstract: <p>Natural populations of flowering plants rarely have perfectly uniform distributions, so trends in pollen dispersal should affect the size of the pollination neighbourhood and influence mating opportunities. Here I used spatial analysis to determine the size of the pollination neighbourhood in a stand of the herbaceous, wind-pollinated plant (<italic>Typha latifolia</italic>;… more
