Are Ontario reptiles on the road to extinction?: anthropogenic disturbance and reptile distributions within Ontario

dc.contributor.advisorBrooks, R.J.
dc.contributor.authorCrowley, Joseph F.
dc.date.accessioned2020-08-24T15:53:16Z
dc.date.available2020-08-24T15:53:16Z
dc.date.copyright2006
dc.degree.departmentDepartment of Zoologyen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractGlobal loss and degradation of natural areas, primarily through road construction and the ensuing disturbance by humans, constitutes a major threat to persistence of wildlife populations. I hypothesized that many of the extirpations of reptile populations in Ontario are due to expanding human disturbance and predicted that road density and land cover will explain the reduced and fragmented ranges of reptile species within Ontario. Historic road data and accounts of population extirpations revealed that road densities associated with extirpated populations were significantly higher than road densities associated with extant populations. Indicators of human activity explained up to 84.1% of the variation in reptile species distribution. The size, location and level of development of Ontario's protected areas were examined to determine their potential as "safe havens" for Ontario's reptiles. Results suggest that Ontario's protected areas may not be adequate to maintain some reptile species within southern Ontario.en_US
dc.identifier.urihttps://hdl.handle.net/10214/20494
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectextirpationsen_US
dc.subjectreptile populationsen_US
dc.subjectOntarioen_US
dc.subjecthuman disturbanceen_US
dc.subjectroad densityen_US
dc.subjectland coveren_US
dc.subjectfragmented rangesen_US
dc.titleAre Ontario reptiles on the road to extinction?: anthropogenic disturbance and reptile distributions within Ontarioen_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Crowley_JosephF_MSc.pdf
Size:
3.07 MB
Format:
Adobe Portable Document Format
Description: