Show simple item record

dc.contributor.advisorvan Heezik, Yolanda
dc.contributor.authorGray, Emily Robyn
dc.date.available2014-05-28T22:50:48Z
dc.date.copyright2014
dc.identifier.citationGray, E. R. (2014). Seasonal use of urban forest vegetation by bush birds (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/4830en
dc.identifier.urihttp://hdl.handle.net/10523/4830
dc.description.abstractIn highly modified landscapes such as urban areas, the ability of native birds to alter foraging behaviour in accordance with environmental and anthropogenic change will play a fundamental role in their survival; however not much is known about behavioural flexibility in foraging by native birds. This study aimed to assess the use of vegetation by native and exotic birds over four seasons in Dunedin, New Zealand. Bird counts were carried out at 71 locations throughout a chain of urban forest fragments consisting of mixed native/exotic vegetation. Actual behaviours exhibited by different bird species were documented in six common native and exotic tree species. In spring there were strong indications for native bird preference of mostly native vegetation and exotic bird preference for mostly exotic vegetation, however this was no longer the case in summer and autumn, when native birds increased their use of exotic vegetation, and exotic birds were found across all vegetation types. In winter neither native nor exotic birds exhibited significant vegetative preferences. Behavioural recordings found that native tree fuchsia (Fuchsia excorticata) provides important resources for native birds in spring and summer, native kanuka (Kunzea ericoides) and exotic oak (Quercus robur) trees may provide useful resources to insectivores year-round. Common bird species were analysed individually and considerable variation in vegetative preferences was found. The concept that native birds want or need native vegetation is not “cut and dried”; multiple factors simultaneously predispose individual species towards success or strife in urbanised habitats and even physically similar or closely related species can respond in unique ways. Season also alters bird feeding behaviour and studies should include all four seasons to avoid seasonal biases. Exotic vegetation can be useful to native birds that are behaviourally adaptable and opportunistic and should be considered for urban plantings. Management incentives in cities need to consider the varying needs and preferences of native birds as a group and those of all species individually, with a focus on enhancing habitat for struggling species as well as avian biodiversity as a whole.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Otago
dc.rightsAll items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectbehaviour
dc.subjectflexibility
dc.subjectforage
dc.subjectdiet
dc.subjectresource
dc.subjectbehaviour
dc.subjectflexibility
dc.subjectforage
dc.subjectdiet
dc.subjectbird
dc.subjecturban
dc.subjectresource
dc.subjectvegetation
dc.titleSeasonal use of urban forest vegetation by bush birds
dc.typeThesis
dc.date.updated2014-05-27T21:27:18Z
dc.language.rfc3066en
thesis.degree.disciplineZoology
thesis.degree.nameMaster of Science
thesis.degree.grantorUniversity of Otago
thesis.degree.levelMasters
otago.openaccessOpen
 Find in your library

Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record