Déterminants comportementaux de la répartition spatiale des oiseaux dans les forêts fragmentées

Content Provider	Semantic Scholar
Author	Bourque, Julie
Copyright Year	2005
Abstract	Reluctance to venture into inhospitable habitat is a frequent explanation for the apparent sensitivity of birds to landscape structure. We tested whether variations in species’ ability to cross open habitat are associated with observed differences in landscape sensitivity in forest birds. We calculated an index of landscape sensitivity from presence-absence data for ten forest-dwelling species. For each species, we also used playbacks to calculate an index of reluctance to cross gaps in the canopy. We controlled for possible phylogenetic effects and analyzed the relationship between the two indices. We predicted that the species responding most negatively to forest loss and associated fragmentation would be the most reluctant to cross gaps in the forest cover. Ovenbirds (Seiurus aurocapilla) was the species most sensitive to landscape structure while American redstarts (Setophaga ruticilla) responded positively to forest loss and fragmentation. Magnolia warblers (Dendroica magnolia) and red-eyed vireos (Vireo olivaceus) were the species most reluctant to cross gaps. The reluctance to cross gaps in the forest cover was not useful in predicting landscape sensitivity. We suggest that processes other than dispersal ability may better explain occurrence patterns in forest birds.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://corpus.ulaval.ca/jspui/bitstream/20.500.11794/18034/1/22611.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article