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dc.contributor.authorSmith, Emily Katherineen_US
dc.date.accessioned2014-03-14T20:37:46Z
dc.date.available2014-03-14T20:37:46Z
dc.date.issued2009-05-06en_US
dc.identifier.otheretd-05202009-135124en_US
dc.identifier.urihttp://hdl.handle.net/10919/33040
dc.description.abstractThe status of whitebark pine (Pinus albicaulis), a foundation and keystone species and a pioneer establisher at alpine treeline, is threatened by the invasive and exotic fungal pathogen (Cronartium ribicola) that causes white pine blister rust in five-needled pines. Originally thought to be limited to moderate environments, the disease is now found extensively throughout colder and dryer regions east of the Continental Divide, including alpine treeline. My research objective was to determine how blister rust infection of treeline whitebark pine varies across Glacier National Park. I present findings from field sampling conducted in July 2008 in Glacier National Park, Montana. Thirty plots were randomly placed at 6 different treeline study sites on the eastern slopes of the Continental Divide. Vegetative and geomorphic characteristics, along with presence/absence and level of blister rust intensity, were detailed within each plot. Vegetation measurements included conifer composition, tree island dimensions and windward growth patterns, evidence and intensity of blister rust, as well as shelter type. Field-measured topographic characteristics included elevation, aspect, and slope. In addition, high resolution GPS-derived DEMs were created at each plot in order to model the land surface and calculate detailed environmental variables in a GIS. Environmental and blister rust intensity variables were used to determine spatial correlates of blister rust infection at treeline. The resulting blister rust prediction model (P < 0.001, F(4,25) = 6.79, R2 = 0.52, Adjusted R2 = 0.44) suggests that areas exhibiting increased wind speed, northwest facing slopes, high flow accumulation rates, and close proximity to perennial streams have a higher likelihood of blister rust intensity, specifically total canker density. Results of this research may contribute to the understanding of the dynamics of this disease, and prove useful in whitebark ecosystem management and conservation.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartThesis_EKS.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectlandscape pathologyen_US
dc.subjectlandscape ecologyen_US
dc.subjecttopographyen_US
dc.subjectDEMen_US
dc.subjectGISen_US
dc.subjectGPSen_US
dc.subjectbiogeographyen_US
dc.titleModeling Blister Rust Incidence in Whitebark Pine at Northern Rocky Mountain Alpine Treelines: A Geospatial Approachen_US
dc.typeThesisen_US
dc.contributor.departmentGeographyen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineGeographyen_US
dc.contributor.committeechairResler, Lynn M.en_US
dc.contributor.committeememberCarstensen, Laurence William Jr.en_US
dc.contributor.committeememberKolivras, Korine N.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05202009-135124/en_US
dc.date.sdate2009-05-20en_US
dc.date.rdate2010-06-10
dc.date.adate2009-06-10en_US


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