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- Avian migration (1)
- Bottomland hardwood forest (1)
- Carcinus maenas (1)
- Food availability (1)
- Functional response (1)
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- Habitat selection (1)
- Habitat use (1)
- Hemigrapsus sanguineus (1)
- Landscape composition (1)
- Life Sciences, Biology, Ecology and Evolutionary Biology (1)
- Migratory land birds (1)
- Mytilus edulis (1)
- Northern Gulf of Mexico (1)
- Predator interference (1)
- Ratio dependence (1)
- Spatial scale (1)
- Stopover (1)
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
Species Invasion Shifts The Importance Of Predator Dependence, Blaine D. Griffen, David G. Delaney
Species Invasion Shifts The Importance Of Predator Dependence, Blaine D. Griffen, David G. Delaney
Faculty Publications
The strength of interference between foraging individuals can influence per capita consumption rates, with important consequences for predator and prey populations and system stability. Here we demonstrate how the replacement of a previously established invader, the predatory crab Carcinus maenas, by the recently invading predatory crab Hemigrapsus sanguineus shifts predation from a species that experiences strong predator interference (strong predator dependence) to one that experiences weak predator interference (weak predator dependence). We demonstrate using field experiments that differences in the strength of predator dependence persist for these species both when they forage on a single focal prey species only (the …
A Multi-Scale Examination Of Stopover Habitat Use By Birds, Jeffrey J. Buler, Frank R. Moore, Stefan Woltmann
A Multi-Scale Examination Of Stopover Habitat Use By Birds, Jeffrey J. Buler, Frank R. Moore, Stefan Woltmann
Faculty Publications
Most of our understanding of habitat use by migrating land birds comes from studies conducted at single, small spatial scales, which may overemphasize the importance of intrinsic habitat factors, such as food availability, in shaping migrant distributions. We believe that a multi-scale approach is essential to assess the influence of factors that control en route habitat use. We determined the relative importance of eight variables, each operating at a habitat-patch, landscape, or regional spatial scale, in explaining the differential use of hardwood forests by Nearctic-Neotropical land birds during migration. We estimated bird densities through transect surveys at sites near the …