Forest Fragmentation and Nest Predation: Are Experiments with Japanese Quail Eggs Misleading?
نویسندگان
چکیده
There is recent concern over the status of many Neotropical migrant bird populations. Reports of declining numbers and the continuing loss and degradation of breeding and overwintering habitats have prompted an upsurge of interest in the conservation biology of these birds (review papers in Hagan and Johnston 1992). Fragmentation of the breeding habitat in North America often is cited as one of the
منابع مشابه
Predation on Artificial Nests in Hurricane- Created Gaps and Adjacent Forest of the Southern Appalachians
Alxtruct: Predation rates were compared during three 7-day trials on 742 artificial ground nests located in 10 hurricane-created canopy gaps and IO adjacent closed-canopy controls in the southern Appalachian mountains of North Carolina. White northern bobwhite (Cdinus virginianus) eggs were used in trials 1 and 2, but brown-speckled Japanese Quail (Coturnix coturr~ix) eggs were used in trial 3 ...
متن کاملEvidence of an Edge Effect on Avian Nest Success
Habitat fragmentation may modify ecological patterns by increasing the importance of edge effects, including elevating rates of predation on avian nests. Conventional wisdom suggests an increased rate of predation along habitat edges, and previous reviews support this view. These reviews did not apply recent statistical approaches, however, and some were based on a small number of studies. In o...
متن کاملLinking Demographic Effects of Habitat Fragmentation across Landscapes to Continental Source–sink Dynamics
Forest fragmentation may cause increased brood parasitism and nest predation of breeding birds. In North America, nest parasitism and predation are expected to increase closer to forest edges because the brood-parasitic Brown-headed Cowbird (Molothrus ater) and generalist nest predators often enter the forest from adjoining developed (largely agricultural) habitats. Yet the abundance of brood p...
متن کاملEffects of climate and exurban development on nest predation and predator presence in the southern Appalachian Mountains (USA).
In the eastern United States, land-use and climate change have likely contributed to declines in the abundance of Neotropical migrant birds that occupy forest interiors, but the mechanisms are not well understood. We conducted a nest-predation experiment in southern Appalachian Mountain forests (North Carolina, U.S.A.) during the 2009 and 2010 breeding seasons to determine the effects of exurba...
متن کاملMarbled murrelet nest predation risk in managed forest landscapes: dynamic fragmentation effects at multiple scales.
The effects of forest fragmentation on bird populations have been studied primarily as static phenomena. Yet when forests are allowed to regenerate, local edge contrast and landscape matrix composition change with time, and we would expect fragmentation effects to change accordingly. Describing this process is critical for the conservation of avian species sensitive to forest fragmentation, inc...
متن کامل