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Pollinator declines select for floral traits that facilitate selfing in Impatiens capensis

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dc.contributor.advisor Caruso, Christina Panique, Hazel 2018-09-17T18:27:26Z 2018-09-17T18:27:26Z 2018-09 2018-09-06 2018-09-17
dc.description.abstract Pollinators have been declining worldwide, affecting plants that depend on them for pollination. In order to persist in the presence of declining pollinators, plants may evolve floral traits that facilitate either pollinator-mediated outcrossing or autonomous self pollination. Whether outcrossing or selfing traits are selected can also be affected by herbivory. To determine whether herbivores can affect pollinator-mediated selection for outcrossing or selfing in the mixed-mating plant Impatiens capensis, I measured phenotypic selection on plants in three treatments: ambient pollinator access and ambient herbivory (P/H), reduced pollinator access and ambient herbivory (–P/H), and reduced pollinator access and increased herbivory (–P/+H). When pollinator access was reduced, plants experienced selection for a floral trait that facilitates autonomous selfing. This pollinator-mediated selection was intensified by herbivory. Plant populations may respond to selection by shifting their mating system towards selfing, which may affect their ability to adapt to environmental stressors in the future. en_US
dc.language.iso en en_US
dc.rights Attribution-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject pollinator decline en_US
dc.subject natural selection en_US
dc.subject plant reproduction en_US
dc.subject mating system en_US
dc.subject floral trait en_US
dc.title Pollinator declines select for floral traits that facilitate selfing in Impatiens capensis en_US
dc.type Thesis en_US Integrative Biology en_US Master of Science en_US Department of Integrative Biology en_US
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Attribution-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NoDerivatives 4.0 International