The invasive species rules: competitive exclusion in forest avian mixed-species flocks in a fragmented landscape

The invasive species rules: competitive exclusion in forest avian mixed-species flocks in a fragmented landscape

Author Maldonado-Coelho, Marcos Autor UNIFESP Google Scholar
Marini, Miguel Angelo Google Scholar
do Amaral, Fabio Raposo Autor UNIFESP Google Scholar
Ribon, Romulo Google Scholar
Abstract Evidence of checkerboard patterns of species' distribution in avian mixed-species flocks suggest that competition is one of the forces shaping the composition and structure of these associations. However, evidence of competition among flock species comes from studies performed in well-preserved regions and no study has reported the interactions between invasive and native flocking species in human-modified landscapes. Such studies are important because evidence show that avian social systems such as mixed-species flocks suffer several negative impacts of habitat fragmentation. In this study, it is shown that an invasive woodcreeper (Lepidocolaptes angustirostris) from open areas of central and western South America is: 1) expanding its range into that of a native Atlantic Forest woodcreeper (L. squamatus)

2) using the same forest fragments in which the native woodcreeper occurs

3) regularly joining Atlantic Forest mixed-species flocks that contain the native woodcreeper

4) overlapping in foraging height with the native woodcreeper during flocking

and 5) engaging in aggressive encounters and excluding the native woodcreeper from flocks. We suggest that this aggressive behavior is a consequence of the overlap in foraging height between the invasive and native species in their original habitats and that their contact has so recently been established. This study suggests that competitive interactions mediated by aggressive behaviors of invasive species may have a negative impact on the fitness of native mixed-species flock species in a fragmented landscape.
Keywords Atlantic Forest
biological invasion
foraging behavior
habitat fragmentation
multispecific interactions
xmlui.dri2xhtml.METS-1.0.item-coverage Vicosa
Language English
Sponsor Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Graduate Program in Ecology and Evolution from Federal University of Sao Paulo (UNIFESP-Diadema)
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
Biota Program
National Science Foundation
World Wildlife Fund (WWF)
Graduate Program of Ecology, Conservation and Wildlife Management (ECMVS) from Federal University of Minas Gerais (UFMG)
Programa Natureza e Sociedade WWF/SUNY projeto
Grant number Biota Program: 2010/05445-2
Biota Program: 2015/18287-0
Biota Program: 2011/50143-7
Biota Program: 2011/23155-4
Biota Program: 2013/50297-0
National Science Foundation: DOB 1343578
Programa Natureza e Sociedade WWF/SUNY projeto: CSR 142-00
Date 2017
Published in Revista Brasileira De Ornitologia. Vicosa, v. 25, n. 1, p. 54-59, 2017.
ISSN 0103-5657 (Sherpa/Romeo, impact factor)
Publisher Soc Brasileira Ornitologia
Extent 54-59
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000413598400008

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