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Responses of Amazonian rain forest birds to habitat modification

  • Andrew D. Johns (a1)
Abstract
ABSTRACT

Bird species were surveyed in a variety of habitat types in a lightly populated area of western Brazilian Amazonia. Habitats surveyed were untagged forest, selectively logged forest, ‘capoeira’ (scrub regenerating on cleared land), cropfields, and an isolated 35 ha forest ‘island’. All habitats were within a few kilometres of each other. Many bird species were found to occur in all or most habitats, although the similarlity of the species assemblages dropped with increasing levels of disturbance of the natural vegetation. Certain understorey insectivores common in untagged forest were rarely observed in other habitats; disturbed areas contained higher numbers of flycalching insectivores or birds feeding on both insects and fruit, some of which were open-country rather than forest species. The avifauna of the forest ‘island’ was more similar to that of regenerating scrub than to that of tall forest, and the persistence of forest species was attributed to their ability to move to and from nearby continuous forest areas.

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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H. L. Bell 1982. A bird communily of lowland rainforest in New Guinea. 1. Composition and density of the avifauna. Emu 82:2441.

J. H. Connell 1978. Diversity in tropical forest and coral reefs. Science 199:13021310.

R. W. Cruden & V. M. Toledo 1977. Oriole pollination of Erythrina brevifiora: evidence for a polytypic view of ornithology. Plant Systematics and Evolution 126:393403.

J. M. Diamond 1973. Distributional ecology of New Guinea birds. Science 179:759769.

P. V. Driscoll & J. Kikkawa 1989. Bird species diversity of lowland tropical rainforests of New Guinea and Northern Australia. Pp. 123–152 in M. L. Harmelin-Vivien & F. Bourliere (eds). Vertebratesin complex tropical systems. Springer-Verlag, New York. 200 pp.

P. Feinsinger 1976. Organization of a tropical guild of nectarivorous birds. Ecological Monographs 46:257291.

C. B. Frith & D. W. Frith 1985. Seasonality of insect abundance in an Australian upland tropical rainforest. Australian Journal of Ecology 10:237248.

R. Greenberg 1981. The abundance and seasonality of forest canopy birds on Barro Colorado Island, Panama. Biotropka 13:241251.

H. S. Horn 1966. Measurement of overlap in comparative ecological studies. American Naturalist 100:419424.

D. H. Janzen 1973. Sweep samples of tropical foliage insects: effects of season, vegetation types, elevation, time of day, and insularity. Ecology 54:686708.

A. D. Johns 1985. Selective logging and wildlife conservation in tropical rain forest: problems and recommendations. Biological Conservation 31:355375.

J. R. Karr & K. E. Freemark 1983. Habitat selection and environmental gradients: dynamics in the ‘stable’ tropics. Ecology 64:14811494.

G. H. Orians 1969. The number of bird species in some tropical forests. Ecology 50:783801.

C. J. Ralph 1985. Habitat association patterns of forest and steppe birds of northern Patagonia, Argentina. Condor 87:471483.

J. V. Remsen Jr & T. A. Parker III 1984. Arboreal dead-leaf searching birds of the Neotropics. Condor 86:3641.

M. H. Robinson 1969. The defensive behaviour of some orthopteriod insects from Panama. Transactions of the Royal Entomological Society of London 121:281303.

J. W. Terborgh & J. S. Weske 1969. Colonization of secondary habitats by Peruvian Birds. Ecology 50:765782.

E. O. Willis 1974. Populations and local extinctions of birds on Barro Colorado Island, Panama. Ecological Monographs 44:153169.

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Journal of Tropical Ecology
  • ISSN: 0266-4674
  • EISSN: 1469-7831
  • URL: /core/journals/journal-of-tropical-ecology
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