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Abstract:

We assessed differences in breeding bird assemblages and vegetation structure between a natural forest edge and the adjacent forest interior in an old-growth Chaco forest of Argentina. The edge had a dense cover of thin stems at low heights and high species richness of woody plants, whereas the interior had high canopy cover, high tree density, high density of thick stems, and a more heterogeneous vertical profile. We used mist-net and point-count surveys to sample bird assemblages, capturing 374 birds during 3,553 net hours and detecting 826 individuals during point counts. Overall, we recorded a total of 74 bird species. Bird species richness and bird abundance appeared to be higher in the edge, although differences between habitats were not entirely consistent for mist-net and point-count data. Several early successional bird species were closely associated with edge, and other species occurred exclusively in the interior of the forest. At the guild level, frugivores, terrestrial granivores, arboreal granivores, terrestrial insectivores, and long-flight insect-hunters were more abundant at the edge than in the interior, whereas the reverse was true for bark insectivores and short-flight insectivores. Our results indicate that edge and interior bird assemblages are different. The distribution of birds between these habitats appeared to reflect constraints on habitat use imposed by vegetation structure, and also could be related to differential distribution of food resources, especially fruit.

Registro:

Documento: Artículo
Título:Responses of avian assemblages to a natural edge in a chaco semiarid forest in Argentina
Autor:Lopez De Casenave, J.; Pelotto, J.P.; Caziani, S.M.; Mermoz, M.; Protomastro, J.
Filiación:Departamento Biología, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Ctro. Estud. Farmacologicos y B., CONICET, Serrano 665, 1414 Buenos Aires, Argentina
Universidad Nacional de Salta, Salta, Argentina
Inst. Biol. y Medicina Experimental, CONICET, Buenos Aires, Argentina
Palabras clave:abundance; bird assemblage; chaco forest; forest edge; old-growth forest; species richness; Argentina; Chaco
Año:1998
Volumen:115
Número:2
Página de inicio:425
Página de fin:435
Título revista:Auk
Título revista abreviado:Auk
ISSN:00048038
CODEN:AUKJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v115_n2_p425_LopezDeCasenave

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Citas:

---------- APA ----------
Lopez De Casenave, J., Pelotto, J.P., Caziani, S.M., Mermoz, M. & Protomastro, J. (1998) . Responses of avian assemblages to a natural edge in a chaco semiarid forest in Argentina. Auk, 115(2), 425-435.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v115_n2_p425_LopezDeCasenave [ ]
---------- CHICAGO ----------
Lopez De Casenave, J., Pelotto, J.P., Caziani, S.M., Mermoz, M., Protomastro, J. "Responses of avian assemblages to a natural edge in a chaco semiarid forest in Argentina" . Auk 115, no. 2 (1998) : 425-435.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v115_n2_p425_LopezDeCasenave [ ]
---------- MLA ----------
Lopez De Casenave, J., Pelotto, J.P., Caziani, S.M., Mermoz, M., Protomastro, J. "Responses of avian assemblages to a natural edge in a chaco semiarid forest in Argentina" . Auk, vol. 115, no. 2, 1998, pp. 425-435.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v115_n2_p425_LopezDeCasenave [ ]
---------- VANCOUVER ----------
Lopez De Casenave, J., Pelotto, J.P., Caziani, S.M., Mermoz, M., Protomastro, J. Responses of avian assemblages to a natural edge in a chaco semiarid forest in Argentina. Auk. 1998;115(2):425-435.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v115_n2_p425_LopezDeCasenave [ ]