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Responses of Amazonian rain forest birds to habitat modification

  • Andrew D. Johns (a1)
Abstract
RESUMO

Levantamentos da avifauna de uma variedade de tipos de habitats foram conduzidos numa área de baixa densidade populacional da Amazônia Brasilcira ocidental. Habitats Icvanlados incluiram mata primária, meta com corte seletivo, capoeira, agro-mosaicos, e uma ‘ilha’ de mata dc 35-ha, os quais ocuparam uma área de 15 km2. Muitas espécics de aves ocorram na maioria ou todos os tipos de habitats, mas a semelhança do conjunto, de espécies diminuiu com o aumento do nível de perlurbação da vegetacao. Cerlos insertívoros de sub-bosque comuns em mala primária foram raramente obscrvados em oulros habitats; áreas perturbadas continham um núimero maior de espécies predando em insetos alados ou alimentando-se de frutos c insetos, algumas das quais cram lipicas de habitats abertos ao inves dc mata. A avifauna da ilha de mata foi mais scmclhante a de capocira do que a de mata alta, e a persistencia das especies de mata foi atribuida a capacidade dessas especies de se deslocar da mata continua á habitats adjaccntcs a vice-e-versa.

RESUMO

Levantamentos da avifauna de uma variedade de tipos de habitats foram conduzidos numa área de baixa densidade populacional da Amazônia Brasilcira ocidental. Habitats Icvanlados incluiram mata primária, meta com corte seletivo, capoeira, agro-mosaicos, e uma ‘ilha’ de mata dc 35-ha, os quais ocuparam uma área de 15 km2. Muitas espécics de aves ocorram na maioria ou todos os tipos de habitats, mas a semelhança do conjunto, de espécies diminuiu com o aumento do nível de perlurbação da vegetacao. Cerlos insertívoros de sub-bosque comuns em mala primária foram raramente obscrvados em oulros habitats; áreas perturbadas continham um núimero maior de espécies predando em insetos alados ou alimentando-se de frutos c insetos, algumas das quais cram lipicas de habitats abertos ao inves dc mata. A avifauna da ilha de mata foi mais scmclhante a de capocira do que a de mata alta, e a persistencia das especies de mata foi atribuida a capacidade dessas especies de se deslocar da mata continua á habitats adjaccntcs a vice-e-versa.

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References
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Journal of Tropical Ecology
  • ISSN: 0266-4674
  • EISSN: 1469-7831
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