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The influence of geomorphology and flow regulation on riparian cottonwoods

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dc.contributor.advisor Rood, Stewart
dc.contributor.author Willms, Chad Ryan
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2007-05-23T20:45:31Z
dc.date.available 2007-05-23T20:45:31Z
dc.date.issued 2005
dc.identifier.uri http://hdl.handle.net/10133/285
dc.description xvi, 141 leaves : ill. ; 29 cm. en
dc.description.abstract This study investigated the influence of geomorphic context and flow regulation on cottonwood (Populus) age structure, stand size, recruitment rates, and annual radial growth patterns along the Oldman River in southern Alberta. Dendrochronological techniques were used to age trees, establish population structures, and measure annual radial growth on three reaches in differing geomorphic contexts. Cottonwoods within a narrow, 'constrained' reach were more negatively impacted by partial dewatering of the river, but responded more favorably to increased late-summer flows combined with suitable recruitment conditions than the trees within a wide, 'alluvial' reach. A positive linear relationship between early-summer peak discharge and annual radial growth was found only on the alluvial reach. However, these trees also had the slowest growth rates, likely due to competition between trees because alluvial reaches often support large, dense stands of cottonwoods. This study demonstrates the need to consider the geomorphic context when studying cottonwood responses to river regulation. en
dc.language.iso en_US en
dc.publisher Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005 en
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en
dc.subject Dissertations, Academic en
dc.subject Cottonwood -- Alberta -- Oldman River Basin en
dc.subject Oldman River, Alta. -- Regulation en
dc.title The influence of geomorphology and flow regulation on riparian cottonwoods en
dc.type Thesis en
dc.publisher.faculty Arts and Science
dc.publisher.department Department of Biological Sciences

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