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Clearing of caldén (Prosopis caldenia) forests for agriculture and cattle raising in east-central La Pampa Province, central Argentina, has created a highly fragmented landscape, a condition that has resulted in adverse effects on birds in other forests, mainly through increased predation rates near forest edges. We evaluated bird nest predation rates using artificial nests, assessing the effects of forest fragment size, distance to the edge and nest height. We measured survival rate of 570 artificial nests located in trees, in bushes and on the ground, at different distances from the edge, in six forest fragments ranging in size from 2.1 to 117.6 ha, during two consecutive breeding seasons. Nest predation rates were significantly related with the number of days of exposition of the nest, nest height and distance to the edge, whereas fragment size and year of the experiment were not associated with predation rates. Ground nests were less likely to be predated than those located in bushes and trees. Predation rates decreased with the distance to the edge, showing a pattern consistent with the existence of an edge effect. © 2017, The Ecological Society of Japan.


Documento: Artículo
Título:Edge effect on bird nest predation in the fragmented caldén (Prosopis caldenia) forest of central Argentina: an experimental analysis
Autor:Sosa, R.A.; Lopez de Casenave, J.
Filiación:Grupo de Investigaciones en Ecología de Comunidades Áridas y Semiáridas (EComAS), Departamento de Recursos Naturales, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Uruguay 151, Santa Rosa, La Pampa L6300CLB, Argentina
Depto. Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Ares, and IEGEBA (UBA-CONICET), Piso 4, Pabellón 2, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Palabras clave:Artificial nests; Fragmentation; Predation; Prosopis caldenia; Semiarid forest; artificial nest; bird; breeding season; edge effect; habitat fragmentation; height; nest predation; patch size; semiarid region; survival; tree; Argentina; La Pampa; Aves; Prosopis caldenia
Página de inicio:129
Página de fin:134
Título revista:Ecological Research
Título revista abreviado:Ecol. Res.


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---------- APA ----------
Sosa, R.A. & Lopez de Casenave, J. (2017) . Edge effect on bird nest predation in the fragmented caldén (Prosopis caldenia) forest of central Argentina: an experimental analysis. Ecological Research, 32(2), 129-134.
---------- CHICAGO ----------
Sosa, R.A., Lopez de Casenave, J. "Edge effect on bird nest predation in the fragmented caldén (Prosopis caldenia) forest of central Argentina: an experimental analysis" . Ecological Research 32, no. 2 (2017) : 129-134.
---------- MLA ----------
Sosa, R.A., Lopez de Casenave, J. "Edge effect on bird nest predation in the fragmented caldén (Prosopis caldenia) forest of central Argentina: an experimental analysis" . Ecological Research, vol. 32, no. 2, 2017, pp. 129-134.
---------- VANCOUVER ----------
Sosa, R.A., Lopez de Casenave, J. Edge effect on bird nest predation in the fragmented caldén (Prosopis caldenia) forest of central Argentina: an experimental analysis. Ecol. Res. 2017;32(2):129-134.