Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina

Autores
Colombo, Martín; Jauregui, Adrian; Gonzalez, Exequiel; Segura, Luciano Noel
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Knowledge of the breeding biology of grassland birds is important given the accelerated rate of transformation of their habitats, which has led to noticeable population declines of many species. Although several species in South America are of conservation concern due to habitat alteration, information on their nesting biology is generally sparse. During three seasons we studied a breeding population of a poorly studied ground-nesting bird, the Grassland Sparrow (Ammodramus humeralis), in grasslands used for cattle grazing in central-eastern Argentina. We described its breeding parameters, estimated nestling growth curves, and analyzed daily nest survival rates (DSR) as a function of grassland characteristics, including grass density, grass height, and distance to forest edges. We found 34 nests placed among low and sparse vegetation and made exclusively of grass. The modal clutch size was three eggs. Incubation and nestling periods lasted 11 and 10.5 days, respectively. Nestlings had a fast-growing tarsus, which could be advantageous to escape from predators early. Only seven nests (20.6%) were successful and predation was the principal cause of nest failure (78% of the failures). DSR was 0.91, resulting in a cumulative survival of 11% for the 23.5 day nesting period. We found no effects of habitat features on DSR, which may be a consequence of the high predation rate and a very diverse predator community in the area. Studies at a broader scale could help to elucidate which habitats favor the reproduction of these species. We emphasize the importance of knowing basic ecological aspects of native grassland birds to develop management plans, especially given the lack of protected grassland areas in the Pampas Grassland ecoregion.
Fil: Colombo, Martín. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Jauregui, Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina
Fil: Gonzalez, Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Segura, Luciano Noel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina
Materia
GROUND-NESTING BIRDS
NEOTROPICS
NEST SUCCESS
NESTLING GROWTH
PASSERELLIDAE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/164104
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern ArgentinaColombo, MartínJauregui, AdrianGonzalez, ExequielSegura, Luciano NoelGROUND-NESTING BIRDSNEOTROPICSNEST SUCCESSNESTLING GROWTHPASSERELLIDAEhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Knowledge of the breeding biology of grassland birds is important given the accelerated rate of transformation of their habitats, which has led to noticeable population declines of many species. Although several species in South America are of conservation concern due to habitat alteration, information on their nesting biology is generally sparse. During three seasons we studied a breeding population of a poorly studied ground-nesting bird, the Grassland Sparrow (Ammodramus humeralis), in grasslands used for cattle grazing in central-eastern Argentina. We described its breeding parameters, estimated nestling growth curves, and analyzed daily nest survival rates (DSR) as a function of grassland characteristics, including grass density, grass height, and distance to forest edges. We found 34 nests placed among low and sparse vegetation and made exclusively of grass. The modal clutch size was three eggs. Incubation and nestling periods lasted 11 and 10.5 days, respectively. Nestlings had a fast-growing tarsus, which could be advantageous to escape from predators early. Only seven nests (20.6%) were successful and predation was the principal cause of nest failure (78% of the failures). DSR was 0.91, resulting in a cumulative survival of 11% for the 23.5 day nesting period. We found no effects of habitat features on DSR, which may be a consequence of the high predation rate and a very diverse predator community in the area. Studies at a broader scale could help to elucidate which habitats favor the reproduction of these species. We emphasize the importance of knowing basic ecological aspects of native grassland birds to develop management plans, especially given the lack of protected grassland areas in the Pampas Grassland ecoregion.Fil: Colombo, Martín. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Jauregui, Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; ArgentinaFil: Gonzalez, Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Segura, Luciano Noel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; ArgentinaTaylor & Francis2021-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/164104Colombo, Martín; Jauregui, Adrian; Gonzalez, Exequiel; Segura, Luciano Noel; Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina; Taylor & Francis; Neotropical Biodiversity; 7; 1; 2-2021; 67-742376-68082376-6808CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1080/23766808.2021.1888625info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/23766808.2021.1888625info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:46:35Zoai:ri.conicet.gov.ar:11336/164104instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:46:35.314CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
title Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
spellingShingle Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
Colombo, Martín
GROUND-NESTING BIRDS
NEOTROPICS
NEST SUCCESS
NESTLING GROWTH
PASSERELLIDAE
title_short Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
title_full Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
title_fullStr Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
title_full_unstemmed Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
title_sort Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina
dc.creator.none.fl_str_mv Colombo, Martín
Jauregui, Adrian
Gonzalez, Exequiel
Segura, Luciano Noel
author Colombo, Martín
author_facet Colombo, Martín
Jauregui, Adrian
Gonzalez, Exequiel
Segura, Luciano Noel
author_role author
author2 Jauregui, Adrian
Gonzalez, Exequiel
Segura, Luciano Noel
author2_role author
author
author
dc.subject.none.fl_str_mv GROUND-NESTING BIRDS
NEOTROPICS
NEST SUCCESS
NESTLING GROWTH
PASSERELLIDAE
topic GROUND-NESTING BIRDS
NEOTROPICS
NEST SUCCESS
NESTLING GROWTH
PASSERELLIDAE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Knowledge of the breeding biology of grassland birds is important given the accelerated rate of transformation of their habitats, which has led to noticeable population declines of many species. Although several species in South America are of conservation concern due to habitat alteration, information on their nesting biology is generally sparse. During three seasons we studied a breeding population of a poorly studied ground-nesting bird, the Grassland Sparrow (Ammodramus humeralis), in grasslands used for cattle grazing in central-eastern Argentina. We described its breeding parameters, estimated nestling growth curves, and analyzed daily nest survival rates (DSR) as a function of grassland characteristics, including grass density, grass height, and distance to forest edges. We found 34 nests placed among low and sparse vegetation and made exclusively of grass. The modal clutch size was three eggs. Incubation and nestling periods lasted 11 and 10.5 days, respectively. Nestlings had a fast-growing tarsus, which could be advantageous to escape from predators early. Only seven nests (20.6%) were successful and predation was the principal cause of nest failure (78% of the failures). DSR was 0.91, resulting in a cumulative survival of 11% for the 23.5 day nesting period. We found no effects of habitat features on DSR, which may be a consequence of the high predation rate and a very diverse predator community in the area. Studies at a broader scale could help to elucidate which habitats favor the reproduction of these species. We emphasize the importance of knowing basic ecological aspects of native grassland birds to develop management plans, especially given the lack of protected grassland areas in the Pampas Grassland ecoregion.
Fil: Colombo, Martín. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Jauregui, Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina
Fil: Gonzalez, Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Segura, Luciano Noel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina
description Knowledge of the breeding biology of grassland birds is important given the accelerated rate of transformation of their habitats, which has led to noticeable population declines of many species. Although several species in South America are of conservation concern due to habitat alteration, information on their nesting biology is generally sparse. During three seasons we studied a breeding population of a poorly studied ground-nesting bird, the Grassland Sparrow (Ammodramus humeralis), in grasslands used for cattle grazing in central-eastern Argentina. We described its breeding parameters, estimated nestling growth curves, and analyzed daily nest survival rates (DSR) as a function of grassland characteristics, including grass density, grass height, and distance to forest edges. We found 34 nests placed among low and sparse vegetation and made exclusively of grass. The modal clutch size was three eggs. Incubation and nestling periods lasted 11 and 10.5 days, respectively. Nestlings had a fast-growing tarsus, which could be advantageous to escape from predators early. Only seven nests (20.6%) were successful and predation was the principal cause of nest failure (78% of the failures). DSR was 0.91, resulting in a cumulative survival of 11% for the 23.5 day nesting period. We found no effects of habitat features on DSR, which may be a consequence of the high predation rate and a very diverse predator community in the area. Studies at a broader scale could help to elucidate which habitats favor the reproduction of these species. We emphasize the importance of knowing basic ecological aspects of native grassland birds to develop management plans, especially given the lack of protected grassland areas in the Pampas Grassland ecoregion.
publishDate 2021
dc.date.none.fl_str_mv 2021-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/164104
Colombo, Martín; Jauregui, Adrian; Gonzalez, Exequiel; Segura, Luciano Noel; Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina; Taylor & Francis; Neotropical Biodiversity; 7; 1; 2-2021; 67-74
2376-6808
2376-6808
CONICET Digital
CONICET
url http://hdl.handle.net/11336/164104
identifier_str_mv Colombo, Martín; Jauregui, Adrian; Gonzalez, Exequiel; Segura, Luciano Noel; Nesting biology and nest survival of the Grassland Sparrow (Ammodramus humeralis) in grazed grasslands of central-eastern Argentina; Taylor & Francis; Neotropical Biodiversity; 7; 1; 2-2021; 67-74
2376-6808
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/23766808.2021.1888625
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/23766808.2021.1888625
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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