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Changes in Habitat Use at Rain Forest Edges Through Succession: a Case Study of Understory Birds in the Brazilian Amazon
Author(s) -
Powell Luke L.,
Zurita Gustavo,
Wolfe Jared D.,
Johnson Erik I.,
Stouffer Philip C
Publication year - 2015
Publication title -
biotropica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 96
eISSN - 1744-7429
pISSN - 0006-3606
DOI - 10.1111/btp.12253
Subject(s) - secondary forest , understory , old growth forest , secondary succession , geography , ecology , amazon rainforest , ecological succession , forestry , habitat , rainforest , agroforestry , biology , canopy
Primary tropical rain forests are being rapidly perforated with new edges via roads, logging, and pastures, and vast areas of secondary forest accumulate following abandonment of agricultural lands. To determine how insectivorous A mazonian understory birds respond to edges between primary rain forest and three age classes of secondary forest, we radio‐tracked two woodcreepers ( G lyphorynchus spirurus , N = 17; X iphorhynchus pardalotus , N = 18) and a terrestrial antthrush ( F ormicarius colma , N = 19). We modeled species‐specific response to distance to forest edge (a continuous variable) based on observations at varying distances from the primary‐secondary forest interface. All species avoided 8–14‐yr‐old secondary forest. G lyphorynchus spirurus and F . colma mostly remained within primary forest <100 m from the young edge. Young F . colma rarely penetrated >100 m into secondary forest 27–31 yr old. Young F ormicarius colma and most G . spirurus showed a unimodal response to 8–14‐yr‐old secondary forest, with relative activity concentrated just inside primary forest. After land abandonment, G . spirurus was the first to recover to the point where there was no detectable edge response (after 11–14 yr), whereas X . pardalotus was intermediate (15–20 yr), and F . colma last (28–30 yr +). Given the relatively quick recovery by our woodcreeper species, new legislation on protection of secondary forests > 20‐yr old in B razil's P ará state may represent a new opportunity for conservation and management; however, secondary forest must mature to at least 30 yr before the full compliment of rain forest‐dependent species can use secondary forest without adverse edge effects.