Spatio-temporal analysis of central Texas savannas : integrating field data with remotely-derived data sources to inform ecosystem function and management

dc.contributor.advisorCrews, Kelley A.
dc.contributor.committeeMemberYoung, Kenneth R
dc.contributor.committeeMemberMiller, Jennifer A
dc.creatorLeVine, Daniel Stephen
dc.creator.orcid0000-0001-5161-473X
dc.date.accessioned2016-12-28T16:19:39Z
dc.date.available2016-12-28T16:19:39Z
dc.date.issued2016-08
dc.date.submittedAugust 2016
dc.date.updated2016-12-28T16:19:40Z
dc.description.abstractAlteration of savanna systems is driven by a wide range of natural and anthropogenic disturbance regimes. This research investigates seasonal trends in vegetation cover and productivity within central Texas environments. Through a combined methodological approach that utilizes vegetation transect fieldwork and satellite imagery analysis, this project provides insight into the influence of management strategies on savanna vegetation. Both a protected area and privately owned land were assessed in order to determine differences between the management strategies employed. Multiple spatial and temporal analysis approaches were employed to better understand vegetation patterning and function within central Texas’ savanna environments. Regression analysis of woody vegetation structural canopy data resulted in significant relationships existing between the presence of graminoid ground cover and the use of prescribed burn management. Time-series analysis of vegetation productivity using a remotely-sensed vegetation index provided insight into the influence of variable precipitation trends and drought conditions on this system. A comparison of functional group diversity and species diversity also investigated the ability of such metrics to predict productivity in these systems, ultimately leading to the suggestion of a combined approach. Lastly, remotely-sensed vegetation indices were included with species distribution modeling of central Texas’ golden-cheeked warblers, allowing for an investigation into strategies to better identify suitable habitats. These findings will inform land management strategies for land owners, land managers, and park managers for a variety of goals including support of grazing capacity, reduction of encroachment, reduction of invasive species, and habitat provision for key species.
dc.description.departmentGeography and the Environment
dc.format.mimetypeapplication/pdf
dc.identifierdoi:10.15781/T2F18SJ1N
dc.identifier.urihttp://hdl.handle.net/2152/44033
dc.language.isoen
dc.subjectSavanna ecology
dc.subjectCentral Texas
dc.titleSpatio-temporal analysis of central Texas savannas : integrating field data with remotely-derived data sources to inform ecosystem function and management
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentGeography and the Environment
thesis.degree.disciplineGeography
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts
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