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Nest-site selection and nest characteristics of the Rufous-collared Sparrow (Zonotrichia capensis) in urban and peri-urban environments

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dc.contributor.advisorMaldonado Chaparro, Adriana
dc.creatorSoler Carvajal, Ana Sofía
dc.creator.degreeBiólogo
dc.creator.degreeLevelPregrado
dc.date.accessioned2026-09-30T16:41:33Z
dc.date.available2026-09-30T16:41:33Z
dc.date.created2026-09-10
dc.descriptionLa calidad y la disponibilidad de los sitios de anidación son componentes importantes de la reproducción de las aves que pueden verse modificados a medida que la urbanización altera la estructura del hábitat y las condiciones ambientales. Por lo tanto, comprender los factores asociados con la selección de los sitios de anidación es esencial para evaluar como las especies persisten en paisajes modificados por el humano. En este estudio se evaluaron las características del microhábitat (altura de la planta, posición del nido y luz relativa) y del entorno (ambiente acústico y presencia del parásito de cría Molothrus bonariensis) asociadas con los sitios de anidación del Copetón (Zonotrichia capensis) en un área urbana y una periurbana de los Andes colombianos. Se muestrearon en total 150 sitios potenciales de anidación y se utilizaron modelos de ocupación de visita única para identificar las variables asociadas con la ocupación de los sitios de anidación. Además, se compararon las características de los sitios de anidación entre las dos localidades estudiadas y la estructura de los nidos, junto con la incorporación de materiales antropogénicos, fueron descritas. La altura de la planta presentó el efecto positivo más fuerte del microhábitat en la ocupación del sitio de anidación, mientras que la luz relativa tuvo un efecto positivo menor y la posición del nido presentó un efecto negativo. Dentro de las variables del entorno, la presencia del Chamón tuvo el efecto positivo más fuerte, mientras que el NDSI presentó un efecto positivo débil y la probabilidad de ocupación fue menor en el sitio periurbano. Solo la altura de la planta y la presencia del Chamón fueron significativamente diferentes entre los dos sitios de estudio. Se midieron 51 nidos y se registró la incorporación de materiales antropogénicos en 15 de ellos. Estos hallazgos contribuyen a una mejor la comprensión de la ecología de anidación del Copetón en ambientes urbanizados y provee una base para futuros estudios sobre la ecología y conservación de las aves urbanas.
dc.description.abstractBird’s nest-site quality and availability are important components of avian reproduction that can be modified as urbanization changes habitat structure and environmental conditions. Thus, understanding the factors associated with nest-site selection is essential to evaluate how species persist in human-modified landscapes. This study evaluated the microhabitat (plant height, nest position, and relative light) and environmental characteristics (acoustic environment and presence of the brood parasite Molothrus bonariensis) associated with the nest-sites of the Rufous-collared Sparrow (Zonotrichia capensis) in an urban and peri-urban areas of the Colombian Andes. A total of 150 potential nesting sites were sampled, and single-visit occupancy models were used to identify the variables associated with nest-site occupancy. Nest-site characteristics were also compared between the study locations, and nest structure and the incorporation of anthropogenic materials were described. Plant height showed the strongest positive microhabitat effect on nest-site occupancy, whereas relative light had a smaller positive effect, and nest position showed a negative effect. Among the environmental variables, the presence of the Shiny Cowbird had the strongest positive effect, while NDSI showed a weak positive effect, and occupancy probability was lower in the peri-urban site. Only plant height and Shiny Cowbird presence differed significantly between the two study sites. Fifty-one nests were measured, and anthropogenic materials were recorded in 15 nests. These findings improve the understanding of the nesting ecology of the Rufous-collared Sparrow in urbanized environments and provide a basis for future studies on urban bird ecology and conservation.
dc.format.extent19 pp
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.48713/10336_48557
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/48557
dc.language.isoeng
dc.publisherUniversidad del Rosario
dc.publisher.departmentEscuela de Ciencias e Ingeniería
dc.publisher.programBiología
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.accesRightsinfo:eu-repo/semantics/embargoedAccess
dc.rights.accesRightsinfo:eu-repo/date/embargoEnd/2028-10-02
dc.rights.accesoRestringido (Temporalmente bloqueado)
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
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dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR
dc.subjectMolothrus bonariensis
dc.subjectAltura de la planta
dc.subjectNDSI
dc.subjectIncidencia de luz
dc.subject.keywordMolothrus bonariensis
dc.subject.keywordPlant height
dc.subject.keywordNDSI
dc.subject.keywordLight incidence
dc.titleNest-site selection and nest characteristics of the Rufous-collared Sparrow (Zonotrichia capensis) in urban and peri-urban environments
dc.title.TranslatedTitleSelección de sitios de anidación y características de los nidos del Copetón (Zonotrichia capensis) en ambientes urbanos y peri-urbanos
dc.typebachelorThesis
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersion
dc.type.spaTrabajo de grado
local.department.reportEscuela de Ciencias e Ingeniería
local.regionesBogotá
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