Birds in anthropogenic landscapes: the responses of ecological groups to forest loss in the Brazilian Atlantic Forest

Morante-Filho, José Carlos, Faria, Deborah, Mariano-Neto, Eduardo and Rhodes, Jonathan (2015) Birds in anthropogenic landscapes: the responses of ecological groups to forest loss in the Brazilian Atlantic Forest. PL o S One, 10 6: 1-18. doi:10.1371/journal.pone.0128923

Author Morante-Filho, José Carlos
Faria, Deborah
Mariano-Neto, Eduardo
Rhodes, Jonathan
Title Birds in anthropogenic landscapes: the responses of ecological groups to forest loss in the Brazilian Atlantic Forest
Journal name PL o S One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2015-06-01
Year available 2015
Sub-type Article (original research)
DOI 10.1371/journal.pone.0128923
Open Access Status DOI
Volume 10
Issue 6
Start page 1
End page 18
Total pages 18
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Language eng
Formatted abstract
Habitat loss is the dominant threat to biodiversity and ecosystem functioning in terrestrial environments. In this study, we used an a priori classification of bird species based on their dependence on native forest habitats (forest-specialist and habitat generalists) and specific food resources (frugivores and insectivores) to evaluate their responses to forest cover reduction in landscapes in the Brazilian Atlantic Forest. From the patch-landscapes approach, we delimited 40 forest sites, and quantified the percentage of native forest within a 2 km radius around the center of each site (from 6 - 85%). At each site, we sampled birds using the point-count method. We used a null model, a generalized linear model and a four-parameter logistic model to evaluate the relationship between richness and abundance of the bird groups and the native forest amount. A piecewise model was then used to determine the threshold value for bird groups that showed nonlinear responses. The richness and abundance of the bird community as a whole were not affected by changes in forest cover in this region. However, a decrease in forest cover had a negative effect on diversity of forest-specialist, frugivorous and insectivorous birds, and a positive effect on generalist birds. The species richness and abundance of all ecological groups were nonlinearly related to forest reduction and showed similar threshold values, i.e., there were abrupt changes in individuals and species numbers when forest amount was less than approximately 50%. Forest sites within landscapes with forest cover that was less than 50% contained a different bird species composition than more extensively forested sites and had fewer forest-specialist species and higher beta-diversity. Our study demonstrated the pervasive effect of forest reduction on bird communities in one of the most important hotspots for bird conservation and shows that many vulnerable species require extensive forest cover to persist.
Keyword Contrasting landscapes
Shade cacao plantations
Habitat fragmentation
Species responses
Southern Bahia
Biodiversity conservation
Functional extinction
Insectivorous birds
Relative importance
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 69014416
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
CEED Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 20 times in Scopus Article | Citations
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