Show simple item record

dc.contributor.authorLin, Fang-yeeen_US
dc.date.accessioned2014-12-05T07:00:38Z
dc.date.available2014-12-05T07:00:38Z
dc.date.issued2013-06-12en_US
dc.identifier.othervt_gsexam:881en_US
dc.identifier.urihttp://hdl.handle.net/10919/50986
dc.description.abstractIntensive agricultural developments and increasing human population has caused severe lowland-forest loss and fragmentation in the western coastal plain in Taiwan over the past centuries. The goal of this study is to explore the multiscale impacts of forest fragmentation on species richness and community composition of lowland-forest birds in Taiwan. At a regional scale, Island Biogeography Theory was applied to examine area and isolation effects on species richness of lowland-forest birds using bird data derived from Breeding Bird Survey Taiwan in 2009 and 2010. I also investigate the differential responses of two functional groups (forest specialists and generalists) to area and isolation effects Furthermore, I examine the relative influences of environmental variables at regional, landscape and local scales on avian community indices and composition in northern Taiwan with a hierarchical multiscale approach. Finally, species vulnerable to forest fragmentation and the ecological traits associated with specie vulnerability to forest fragmentation were identified.

Only forest specialist species responded to the regional-scale area and isolation effects. The species richness of forest specialists increased with the size of forest islands, and the community similarity of forest specialist species declined with increasing the distance from the sources of immigrants. Structurally isolated forests may not function as real habitat patches from the view of forest generalists because of their flexibility in utilizing the non-forest matrix. After accounting for the influences of environmental variables at other spatial scales, the regional-scale isolation effect still played a key role in determining avian community composition based on the  
presence/absence data set. But local-scale forest condition also explained a considerable amount of variability in the presence/absence data set. The regional-scale isolation effect, however, didn\'t show significant influences on community composition based on the abundance data set. In contrast, the landscape-scale variables explained the largest amount of variability in the abundance data set at the entire community level. There were six bird species (Parus varius, Dicrurus aeneus, Treron sieboldii, Pericrocotu solaris, Erporniszan tholeuca and Alcippe brunnea) whose occurrence and abundance were both vulnerable to forest fragmentation. Habitat specialization was the ecological traits most strongly associated with their vulnerability
en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectavian communityen_US
dc.subjectforest fragmentationen_US
dc.subjectfragmentation vulnerability indexen_US
dc.title'Islands' in an island: multiscale effects of forest fragmentation on lowland forest birds in Taiwanen_US
dc.typeDissertationen_US
dc.contributor.departmentFisheries and Wildlife Scienceen_US
dc.description.degreePHDen_US
thesis.degree.namePHDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineFisheries and Wildlife Scienceen_US
dc.contributor.committeechairStauffer, Dean Fen_US
dc.contributor.committeememberFraser, James Den_US
dc.contributor.committeememberHaas, Carola Aen_US
dc.contributor.committeememberWynne, Randolph Hen_US
dc.contributor.committeememberPrisley, Stephen Pen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record