Cavity characteristics, but not habitat, influence nest survival of cavity-nesting birds along a gradient of human impact in the subtropical Atlantic Forest

Authors
Cockle, Kristina Louise; Bodrati, Alejandro; Lammertink, J. Martjan; Martin, Kathy
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
Cavity-nesting vertebrates are an important component of biodiversity in tropical and subtropical forests, but their persistence will increasingly depend on remnant trees in logged forest and agricultural areas. To identify key habitat features for conservation, we examined the factors that influenced daily nest survival for a community of cavity-nesting birds along a gradient of human impact, from primary Atlantic Forest through logged forest to farms. We used logistic-exposure models to determine how characteristics of the habitat, nest tree, cavity, and timing influenced daily nest survival. Overall, predation and/or usurpation caused 92% of nest failures. Daily survival rates ranged 0.961-0.992 for five species of birds that could be studied best, giving probabilities of 0.19-0.62 of survival from laying to fledging. The top models predicting nest survival included cavity and tree characteristics but no habitat variables (canopy cover, forest condition, or distance to forest edge). Small birds (12-128. g) experienced higher nest survival in cavities with smaller entrance diameters, higher above the ground. Large birds (141-400. g) experienced higher nest survival in living trees than in dead trees. Birds experienced similar nest survival in primary forest, logged forest, and farms. Our results highlight the conservation value of cavity-bearing trees in anthropogenic habitats. A pressing policy issue for tropical and subtropical forests is to move beyond minimum diameter cutting limits and instead focus on retention of large old trees.
Fil: Cockle, Kristina Louise. Provincia de Misiones. Proyecto Selva de Pino Paraná; Argentina. University of British Columbia; Canadá. State University of Louisiana; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bodrati, Alejandro. Provincia de Misiones. Proyecto Selva de Pino Paraná; Argentina
Fil: Lammertink, J. Martjan. Provincia de Misiones. Proyecto Selva de Pino Paraná; Argentina. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina. Cornell University; Estados Unidos
Fil: Martin, Kathy. University of British Columbia; Canadá
Subject
ARGENTINA
HABITAT DEGRADATION
HOLE-NESTING BIRD
LOGGING
NEST SUCCESS
NEST-SITE CHARACTERISTICS
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/38422