Journal
BIOLOGICAL CONSERVATION
Volume 188, Issue -, Pages 100-108Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biocon.2015.01.028
Keywords
Amazon; Fidelity fragmentation; Neotropical birds; Secondary forest; Multistate models; Movement probability
Funding
- U.S. National Science Foundation [LTREB 0545491]
- American Union of Ornithologists' Research Award
- American Union of Ornithologists' Frank M. Chapman Award
- Wilson Ornithological Society's Paul A. Stewart Award
- American Philosophical Society's Lewis Clark Fund
- Direct For Biological Sciences
- Division Of Environmental Biology [1257340] Funding Source: National Science Foundation
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Given rates of deforestation, disturbance, and secondary forest accumulation in tropical rainforests, there is a great need to quantify habitat use and movement among different habitats. This need is particularly pronounced for animals most sensitive to disturbance, such as insectivorous understory birds. Here we use multistate capture-recapture models with radiotelemetry data to determine the successional stage at which within-day movement probabilities of Amazonian birds in secondary forest are similar to those in primary forest. We radio-tracked three common understory insectivore species in primary and secondary forest at the Biological Dynamics of Forest Fragments project near Manaus, Brazil: two woodcreepers, Glyphorynchus spirurus (n = 19) and Xiphorhynchus pardalotus (n = 18), and the terrestrial antthrush Formicarius colma (n = 19). Forest age was a strong predictor of fidelity to a given habitat. All three species showed greater fidelity to primary forest than to 8-14-year-old secondary forest, indicating the latter's relatively poor quality. The two woodcreeper species used 12-18-year-old secondary forest in a manner comparable to continuous forest, but F. colma avoided moving even to 27-31-year-old secondary forest the oldest at our site. Our results suggest that managers concerned with less sensitive species can assume that forest reserves connected by 12-18-year-old secondary forest corridors are effectively connected. On the other hand, >30 years are required after land abandonment before secondary forest serves as a primary forest-like conduit for movement by F. colma; more sensitive terrestrial insectivores may take longer still. Published by Elsevier Ltd.
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