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dc.contributor.advisorWu, X. Ben
dc.creatorPerotto Baldiviezo, Humberto Lauro
dc.date.accessioned2006-10-30T23:28:52Z
dc.date.available2006-10-30T23:28:52Z
dc.date.created2005-08
dc.date.issued2006-10-30
dc.identifier.urihttp://hdl.handle.net/1969.1/4300
dc.description.abstractRio Grande wild turkey (RGWT) abundance in portions of the Edwards Plateau has declined steadily since the late 1970s as compared to other areas of the Edwards Plateau where populations have exhibited no trend. The reasons for this decline remain unclear. Possible factors include changes in habitat, and increased human population. The overall objective of this study was to identify landscape changes and habitat characteristics that affect RGWT populations using spatial analysis and modeling at multiple spatial scales. Specific objectives for this study included the quantification of flood-induced landscape changes between 1972 and 1995 along the Medina River bottomlands and their impact on RGWT habitat, the quantification of landscape characteristics of stable and declining study sites in the Edwards Plateau, and the development and evaluation of a GIS-based habitat-suitability model for female RGWTs during the breeding season that will allow the assessment of the spatial distribution of adequate habitat in the Edwards Plateau.The analysis of the landscape characteristics along the North Prong Medina River due to flooding in 1978 had a negative impact on RGWT habitat. Changes in the spatial distribution of woody cover in the bottomlands and the removal of woody cover along riparian zones most likely limited habitat use and dispersal of RGWT along the North Prong Medina River. The analysis of landscape characteristics in sites with stable and declining of RGWTs populations showed that disturbance and a high proportion of woody cover were important factors influencing RGWT populations in areas where turkey numbers had declined. Landscape attributes were used as habitat variables to develop a habitat-suitability model for female RGWTs during the breeding season. The model performed well in characterizing high-suitability habitat for adult female RGWT during the breeding season in the study areas. The use of two scales relevant to RGWT provided important information about the high-suitability areas for female RGWT in stable and declining sites in the Edwards Plateau.en
dc.format.extent2134374 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M University
dc.subjectGISen
dc.subjectHabitat suitabilityen
dc.subjectRemote sensingen
dc.subjectRio Grande wild turkeyen
dc.titleGIS-based multiple scale study of Rio Grande wild turkey habitat in the Edwards Plateau of Texasen
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentRangeland Ecology and Managementen
thesis.degree.disciplineRangeland Ecology and Managementen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameDoctor of Philosophyen
thesis.degree.levelDoctoralen
dc.contributor.committeeMemberPeterson, Markus J.
dc.contributor.committeeMemberSilvy, Nova J.
dc.contributor.committeeMemberSmeins, Fred E.
dc.type.genreElectronic Dissertationen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


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