Time-Lag in Responses of Birds to Atlantic Forest Fragmentation: Restoration Opportunity and Urgency

PloS One
Alexandre Uezu, Jean Paul Metzger

Abstract

There are few opportunities to evaluate the relative importance of landscape structure and dynamics upon biodiversity, especially in highly fragmented tropical landscapes. Conservation strategies and species risk evaluations often rely exclusively on current aspects of landscape structure, although such limited assumptions are known to be misleading when time-lag responses occur. By relating bird functional-group richness to forest patch size and isolation in ten-year intervals (1956, 1965, 1978, 1984, 1993 and 2003), we revealed that birds with different sensitivity to fragmentation display contrasting responses to landscape dynamics in the Brazilian Atlantic Forest. For non-sensitive groups, there was no time-lag in response: the recent degree of isolation best explains their variation in richness, which likely relates to these species' flexibility to adapt to changes in landscape structure. However, for sensitive bird groups, the 1978 patch area was the best explanatory variable, providing evidence for a 25-year time-lag in response to habitat reduction. Time-lag was more likely in landscapes that encompass large patches, which can support temporarily the presence of some sensitive species, even when habitat cover is relativ...Continue Reading

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Citations

Dec 7, 2017·Conservation Biology : the Journal of the Society for Conservation Biology·Gabriel L BrejãoLilian Casatti
Mar 22, 2019·The Journal of Animal Ecology·Céline BellardBernard Hugueny
Jun 18, 2016·Molecular Ecology·Aurélie KhimounStéphane Garnier
Aug 23, 2017·Proceedings of the National Academy of Sciences of the United States of America·William D NewmarkJohn M Halley
Jan 7, 2021·Proceedings. Biological Sciences·Asunción Semper-PascualTobias Kuemmerle
Nov 12, 2020·Anais Da Academia Brasileira De Ciências·Marcos AntÔnio MeloAugusto JoÃo Piratelli

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