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dc.contributor.authorRoberts, Amy A.en_US
dc.date.accessioned2014-03-14T20:40:45Z
dc.date.available2014-03-14T20:40:45Z
dc.date.issued2007-05-04en_US
dc.identifier.otheretd-06282007-142826en_US
dc.identifier.urihttp://hdl.handle.net/10919/33801
dc.description.abstractHabitat preference of the eastern fence lizard, Sceloporus undulatus, was investigated in southwestern Virginia. Habitat features were measured at 158 lizard-centered plots and at paired random plots. Landscape-level variables, southerly aspect and mixed forest type, distinguished lizard-centered from random sites. Hatchlings were associated with relatively high temperature at perch height (23 °C), relatively high amounts (per 1- m2) of coarse woody debris (15%) and bare ground (15%), and relatively low amount of litter (34%). Adults and juveniles were associated with a relatively high number of rocks (22 per 0.01 hectare) and amount of coarse woody debris (9% per 1- m2). Habitat preferences were modeled with a Geographic Information System (GIS) using landscape-level variables and with logistic regression and Akaikeâ s Information Criterion using site-level variables. The best-fitting site-level model for adults/juveniles included % CWD. The best-fitting model for hatchlings included % CWD and number of rocks, and the second best-fitting model also included % litter. Landscape (both classes) and site-level models (adult/juveniles only) were tested at 15 GIS-predicted â suitableâ study areas and at 15 GIS-predicted â unsuitableâ areas. Site-level models for hatchlings were tested with independent data collected at two study areas. Sixteen lizards were found at â suitableâ areas and one at an â unsuitableâ area; the GIS-based model was a good predictor of lizard presence at the landscape level. The best-fitting site-level models for adults/juveniles and hatchlings were poor predictors of lizard presence while the second best-fitting hatchling model was a good predictor of hatchling presence.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartETDrevised2.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.subjectGISen_US
dc.subjectAICen_US
dc.subjectfence lizarden_US
dc.subjectSceloporus undulatusen_US
dc.subjecthabitaten_US
dc.titleHabitat preferences of the eastern fence lizard, Sceloporus undulatus, in southwestern Virginiaen_US
dc.typeThesisen_US
dc.contributor.departmentBiologyen_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.disciplineBiologyen_US
dc.contributor.committeechairAndrews, Robin M.en_US
dc.contributor.committeememberStauffer, Dean F.en_US
dc.contributor.committeememberHaas, Carola A.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06282007-142826/en_US
dc.date.sdate2007-06-28en_US
dc.date.rdate2007-07-26
dc.date.adate2007-07-26en_US


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