Winter Responses of Forest Birds to Habitat Corridors and Gaps

dc.contributor.authorSt. Clair, Colleen Cassadyen_US
dc.contributor.authorBelisle, Marcen_US
dc.contributor.authorDesrochers, Andreen_US
dc.contributor.authorHannon, Susanen_US
dc.date.accessioned2009-07-31T14:56:42Z
dc.date.available2009-07-31T14:56:42Z
dc.date.issued1998en_US
dc.date.submitted2008-12-01en_US
dc.date.submitted2008-12-01en_US
dc.description.abstract"Forest fragmentation and habitat loss may disrupt the movement or dispersal of forest-dwelling birds. Despite much interest in the severity of these effects and ways of mitigating them, little is known about actual movement patterns in different habitat types. We studied the movement of wintering resident birds, lured by playbacks of mobbing calls, to compare the willingness of forest birds to travel various distances in continuous forest, along narrow corridors (fencerows), and across gaps in forest cover. We also quantified the willingness of Black-capped Chickadees (Poecile atricapillus) to cross gaps when alternative forested detour routes were available. All species were less likely to respond to the calls as distance increased to 200 m, although White-breasted Nuthatches (Sitta carolinensis) and Hairy Woodpeckers (Picoides villosus) were generally less likely to respond than chickadees and Downy Woodpeckers (P. pubescens). Chickadees were as likely to travel in corridors as in continuous forest, but were less likely to cross gaps as the gap distance increased. The other species were less willing to travel in corridors and gaps relative to forest, and the differences among habitats also increased with distance. For chickadees, gap-crossing decisions in the presence of forested detours varied over the range of distances that we tested, and were primarily influenced by detour efficiency (the length of the shortcut relative to the available detour). Over short distances, birds used forested detours, regardless of their efficiency. As absolute distances increased, birds tended to employ larger shortcuts in the open when detour efficiency was low or initial distance in the open was high, but they limited their distance from the nearest forest edge to 25 m. Thus, chickadees were unwilling to cross gaps of > 50 m when they had forested alternatives, yet they sometimes crossed gaps as large as 200 m when no such choice existed. Our results suggest that the presence of corridors enhanced the movement of some, but not all, forest birds, and that even chickadees, which were less sensitive to gap width, preferred not to venture far from forest cover."en_US
dc.identifier.citationjournalEcology and Societyen_US
dc.identifier.citationmonthDecemberen_US
dc.identifier.citationnumber2en_US
dc.identifier.citationvolume2en_US
dc.identifier.urihttps://hdl.handle.net/10535/3056
dc.subjectbirdsen_US
dc.subjectwildlifeen_US
dc.subjectanimal behavioren_US
dc.subjectforest managementen_US
dc.subject.sectorWildlifeen_US
dc.titleWinter Responses of Forest Birds to Habitat Corridors and Gapsen_US
dc.typeJournal Articleen_US
dc.type.publishedpublisheden_US
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