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Title: Dispersal of Amazonian birds in continuous and fragmented forest
Authors: Van Houtan, Kyle
Pimm, Stuart
Halley, John Maxwell
Bierregaard, Richard O.
Lovejoy, Thomas E.
Keywords: Bird
Forest Dynamics
Gap Dynamics
Gaussian Method
Habitat Fragmentation
Numerical Model
Tropical Forest
Environmental Monitoring
Environmental Protection
Population Dynamics
Tropic Climate
Conservation Of Natural Resources
Environmental Monitoring
Population Dynamics
Tropical Climate
South America
Issue Date: 2007
metadata.dc.publisher.journal: Ecology Letters
metadata.dc.relation.ispartof: Volume 10, Número 3, Pags. 219-229
Abstract: Many ecologists believe birds disappear from tropical forest fragments because they are poor dispersers. We test this idea using a spatially explicit capture data base from the Biological Dynamics of Forest Fragments Project near Manaus, Brazil. We measure bird movements directly, over relatively large scales of space and time, both before and after landscape fragmentation. We found that species which disappear from fragments move extensively between plots before isolation, but not after, and often disperse to longer distances in continuous forest than in fragmented forest. Such species also preferentially emigrate from smaller to larger fragments, showing no preference in continuous forest. In contrast, species that persist in fragments are generally less mobile, do not cross gaps as often, yet disperse further after fragmentation than before. 'Heavy tailed' probability models usually explain dispersal kernels better than exponential or Gaussian models, suggesting tropical forest birds may be better dispersers than assumed with some individuals moving very long distances. © 2007 Blackwell Publishing Ltd/CNRS.
metadata.dc.identifier.doi: 10.1111/j.1461-0248.2007.01004.x
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