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One size does not fit all: context specificity drives invasion in grassland plants

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dc.contributor.advisor MacDougall, Andrew Rogers, Michael 2019-01-04T17:36:23Z 2019-01-04T17:36:23Z 2018-12 2018-12-12 2019-01-04
dc.description.abstract There has been little consensus of the relative importance of three determinants of invasion – invader traits, propagule pressure, and community susceptibility to invasion determined by resource availability (invasibility) – given the logistical difficulties of disentangling their interactions. I tested whether combinations of factors driving invasion (invasion pathways) of ten grassland invaders were similar among species or context-specific. I tested this by quantifying traits with a greenhouse study, followed by a factorial field experiment [with different scenarios of propagule pressure (seed count) and invasibility (nutrients, disturbance, biotic resistance)]. My work supported context-specificity. None of the invaders had ubiquitous success among experimental treatments. Each tested factor was important, with some being more commonly important than others (e.g., propagule pressure). I find invasion pathways were highly differentiated by species identity. These findings may help to explain the current lack of consensus in the literature with deriving generalizable predictions of grassland plant invasions. en_US
dc.description.sponsorship Queen Elizabeth II Graduate Scholarship in Science and Technology. Ontario Graduate Scholarship. en_US
dc.language.iso en en_US
dc.subject invasion en_US
dc.subject invasibility en_US
dc.subject propagule pressure en_US
dc.subject interaction en_US
dc.subject community resistance en_US
dc.subject trait en_US
dc.subject resource en_US
dc.subject disturbance en_US
dc.subject eutrophication en_US
dc.subject grassland en_US
dc.subject restoration en_US
dc.subject non-native en_US
dc.title One size does not fit all: context specificity drives invasion in grassland plants 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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