Resistencia a la sequía y su relación con rasgos funcionales de especies tropicales en un ambiente urbano

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dc.contributor.advisorMoreno Hurtado, Flavio Humberto
dc.contributor.advisorCifuentes Gómez, Lucas
dc.contributor.authorVásquez Gómez, María Isabel
dc.contributor.orcidVásquez Gómez, María Isabel [0009000424439947]
dc.contributor.orcidCifuentes, Lucas [0000000316900073]
dc.date.accessioned2025-12-02T15:53:08Z
dc.date.available2025-12-02T15:53:08Z
dc.date.issued2025-09-14
dc.descriptionIlustraciones
dc.description.abstractEl cambio climático prevé escenarios de sequías más intensas y temperaturas más elevadas, afectando particularmente a los árboles urbanos por el fenómeno de isla de calor urbana. En este estudio se analizó la relación entre los rasgos funcionales y la tolerancia a la sequía en diez especies arbóreas ubicadas en el campus de la Universidad Nacional de Colombia, sede Medellín. La tolerancia se evaluó a través de dos indicadores fisiológicos: el punto de perdida de turgencia de las hojas (πTLP) y la variación diurna en el potencial hídrico en dos temporadas contrastantes de precipitación. También se calculó el margen de seguridad foliar (SM) para determinar si las especies están operando cerca de su umbral de turgencia. Encontramos que la mayoría de las especies ajustaron sus potenciales hídricos entre temporadas, lo que sugiere una respuesta activa a la disminución en la precipitación. Las especies tolerantes a la sequía se caracterizaron por una alta inversión en sus tejidos, como madera y hojas más densas, pero SM más estrechos – pero positivos- en ambas temporadas. Por el contrario, las especies con lámina foliar más delgada, mayor tamaño de vasos del xilema y alta capacitancia, presentaron poca variación en el potencial hídrico a lo largo del día, πTLP menos negativos y mayores cambios en el SM entre temporadas. Estos resultados resaltan rasgos funcionales importantes para tomar decisiones a la hora de escoger especies para reforestar áreas urbanas (Tomado de la fuente)spa
dc.description.abstractClimate change is expected to bring more intense droughts and higher temperatures, particularly affecting urban trees due to urban heat island effects. This study analyzed the relationship between functional traits and drought tolerance (DT) in ten native tree species located on the Medellín campus of the Universidad Nacional de Colombia. DT was assessed using two physiological indicators: the leaf turgor loss point (πTLP) and the diurnal variation in water potential across contrasting rainfall seasons. We also calculated the leaf safety margin (SM) to determine whether species are operating near their turgor threshold. We found that most species adjusted their water potentials between seasons, suggesting an active response to reduced rainfall. Drought-tolerant species were characterized by high tissue investment traits, such as greater wood and leaf tissue density, but narrower– but consistently positive- SM in both seasons. In contrast, species with thinner leaves, larger xylem vessel diameters, and higher capacitance showed minimal variation in water potential throughout the day, less negative πTLP, and a huge change in SM between seasons. These results highlight important functional traits for decision-making when selecting species for urban reforestation.eng
dc.description.curricularareaBosques Y Conservación Ambiental.Sede Medellín
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Bosques y Conservación Ambiental
dc.format.extent1 recurso en línea (60 páginas)
dc.format.mimetypeapplication/pdf
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/89174
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellín
dc.publisher.facultyFacultad de Ciencias Agrarias
dc.publisher.placeMedellín, Colombia
dc.publisher.programMedellín - Ciencias Agrarias - Maestría en Bosques y Conservación Ambiental
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseReconocimiento 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject.ddc630 - Agricultura y tecnologías relacionadas::634 - Huertos, frutas, silvicultura
dc.subject.lembÄrboles - Resistencia a la sequia
dc.subject.lembEcología urbana
dc.subject.proposalMargen de seguridadspa
dc.subject.proposalPunto de pérdida de turgenciaspa
dc.subject.proposalCambio climáticospa
dc.subject.proposalÄrboles urbanosspa
dc.subject.proposalPotencial hídricospa
dc.subject.proposalEcología urbanaspa
dc.subject.proposalSafety margineng
dc.subject.proposalTurgor los pointeng
dc.subject.proposalClimate changeeng
dc.subject.proposalUrban treeseng
dc.subject.proposalhydric potentialeng
dc.subject.proposalUrban ecophysiologyeng
dc.subject.wikidataCambio climático
dc.subject.wikidataPotencial hídrico
dc.titleResistencia a la sequía y su relación con rasgos funcionales de especies tropicales en un ambiente urbano
dc.title.translatedDrought resistance and its relationship with functional traits of tropical species in an urban environment
dc.typeTrabajo de grado - Maestría
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.redcolhttp://purl.org/redcol/resource_type/TM
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dcterms.audience.professionaldevelopmentEstudiantes
dcterms.audience.professionaldevelopmentInvestigadores
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2

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