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dc.contributor.authorLambert, Callie Brookeen_US
dc.date.accessioned2019-02-02T09:02:02Z
dc.date.available2019-02-02T09:02:02Z
dc.date.issued2019-02-01en_US
dc.identifier.othervt_gsexam:18067en_US
dc.identifier.urihttp://hdl.handle.net/10919/87411
dc.description.abstractGlacier retreat is considered a clear sign of global climate change. Although a rich body of work has documented glacial response to climate warming trends, comparatively little research has assessed vegetation change in recently deglaciated areas. In this study, we assess vegetation change at two glacier forefronts in Glacier National Park, Montana, through remote sensing analysis, fieldwork validation, and statistical modelling. The research objectives were to: 1) quantify the spatial and temporal patterns of landcover change of five classes"ice, rock, tree, shrub, and herbaceous at the two glacier forefronts in Glacier National Park, and 2) determine the role of selected biophysical terrain factors (elevation, slope, aspect, solar radiation, flow accumulation, TWI, and geology) on vegetation change at the deglaciated areas. Landsat imagery of the study locations in 1991, 2003, and 2015 were classified and validated using ground truth points and visual interpretation for accuracy. Overall accuracies were above 75% for all classified images. To identify biophysical correlates of change, we used generalized linear mixed models with non-vegetated surfaces to vegetation (code=1) or stable non-vegetation class (code=0) as a binary response variable. Results revealed elevation, slope, TWI, geology, and aspect to be associated with increased vegetation over time at Jackson Glacier forefront, whereas elevation, slope, solar radiation, and geology were significant at Grinnell Glacier forefront. New case studies on vegetation change in recently deglaciated regions can deepen our knowledge about how glacier retreat at local scales results in recharged ecosystem dynamics.en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis item is protected by copyright and/or related rights. Some uses of this item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectPhysical geographyen_US
dc.subjectGlacier retreaten_US
dc.subjectVegetation changeen_US
dc.subjectGlacier National Parken_US
dc.titleSpatio-Temporal Vegetation Change as related to terrain factors at two Glacier Forefronts, Glacier National Park, Montanaen_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.committeechairShao, Yangen_US
dc.contributor.committeememberButler, David R.en_US


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