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

Autor(es)

Maldonado-Coelho, Marcos ^[1] ; Marini, Miguel Angelo ^[2] ; do Amaral, Fabio Raposo ^[1] ; Ribon, Romulo ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Ecol & Biol Evolut, BR-09972270 Diadema, SP - Brazil

^[2] Univ Brasilia, Inst Ciencias Biol, Dept Zool, BR-70910900 Brasilia, DF - Brazil

^[3] Univ Fed Vicosa, Dept Biol Anim, Museu Zool Joao Moojen de Oliveira, BR-36570000 Vicosa, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REVISTA BRASILEIRA DE ORNITOLOGIA; v. 25, n. 1, p. 54-59, MAR 2017.
• Citações Web of Science: 2

Resumo

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. (AU)

• Processo FAPESP: 11/50143-7 - Filogeografia multilocus comparada de três espécies de Poospiza (Aves, Passeriformes): explorando a história da Mata Atlântica montana
• Beneficiário: Fábio Sarubbi Raposo do Amaral
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Jovens Pesquisadores
• Processo FAPESP: 13/50297-0 - Dimensions US-BIOTA São Paulo: integrando disciplinas para a predição da biodiversidade da Floresta Atlântica no Brasil
• Beneficiário: Cristina Yumi Miyaki
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 10/05445-2 - Análise genética da zona de contato entre os Olhos-de-fogo (Pyriglena, Thamnophilidae) da Mata Atlântica usando modelos de clina
• Beneficiário: Marcos Maldonado Coelho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/18287-0 - Comparando taxas evolutivas entre cantos e chamados nos olhos-de-fogo sul americanos (Aves: Pyriglena): um teste de hipóteses em uma perspectiva filogenética
• Beneficiário: Marcos Maldonado Coelho
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 11/23155-4 - Filogeografia multilocus comparada de três espécies de Poospiza (Aves, Passeriformes): explorando a história da Mata Atlântica montana
• Beneficiário: Fábio Sarubbi Raposo do Amaral
• Modalidade de apoio: Bolsas no Brasil - Programa BIOTA - Jovens Pesquisadores