Annual tree rings in the rainiest forests of the Americas

dc.contributor.advisorValle, Jorge Ignacio del
dc.contributor.authorGiraldo, Jorge A.
dc.contributor.researchgroupBosques y Cambio Climáticospa
dc.coverage.cityChocó, Colombia
dc.date.accessioned2021-10-07T15:29:01Z
dc.date.available2021-10-07T15:29:01Z
dc.date.issued2021
dc.descriptionilustraciones, mapas, tablasspa
dc.description.abstractIn this dissertation, I explore the dendrochronological potential of trees from a lowlands tropical wet forest (Precipitation over 7,200 mm y-1), without seasonal water deficit or flooding. I study the causes and sensitivity of annual growth rings to climate variables in several tree species by different methods. I analyzed the anatomical features of 81 tree species (~ 45% showed well-defined tree rings) (Chapter 1). Then I present results of tree ring frequency and possible causes of tree ring formation. I observed both positive and negative growth answers to water and light availability, depending on the tree species, suggesting that either excess or deficit of growth factors may explain seasonal growth rhythms in some trees (Chapter 2). This fact is also observed by the intra-annual variability of stable isotopes in tree rings (Chapter 3). As a study case, I present a practical application of dendroecology as an effective tool for resolving disputes in forensic sciences, the first carried in the biogeographic Chocó region (Chapter 4). This research opens a new frontier for tree rings science, the ever-wet tropical forests without water deficit.eng
dc.description.abstractEn esta disertación, exploro el potencial dendrocronológico de los árboles de los bosques siempre húmedos tropicales (Precipitación superior a 7,200 mm año-1 ), que no presentan déficit hídrico o inundaciones periódicas. Se estudian las causas y la sensibilidad de los anillos de crecimiento anuales a variables climáticas en muchas especies de árboles, a través de diferentes métodos. Son analizadas las características anatómicas de la madera en 81 especies de árboles (~ 45% presentan anillos de crecimiento bien definidos) (Capítulo 1). En el Capítulo 2, se presentan los resultados de la frecuencia de anillos en muchas especies y se exploran los posibles detonantes ambientes de su formación. Se obtienen observaciones tanto positivas como negativas entre el crecimiento, el agua y la disponibilidad de luz, dependiendo de la especie; lo cual sugiere que tanto el déficit como el exceso del crecimiento pueden ser factores que determinan el crecimiento rítmico en algunas especies de árboles. Dicha evidencia También es observada a través de la variabilidad intra anual de las proporciones isotópicas del oxígeno en la celulosa (δ 18Ocelulosa) (Capítulo 3). Como un caso de estudio, se presenta una aplicación práctica de la dendrocronología como una herramienta efectiva para resolver disputas legales, siendo ese el primer ejemplo de dicha aplicación, llevado a cabo en la región biogeográfica del Chocó (Capítulo 4). Esta investigación abre una nueva frontera en la ciencia de los anillos de crecimiento, los bosques siempre húmedos tropicales carentes de déficit hídrico. (Texto tomado de la fuente)spa
dc.description.degreelevelDoctoradospa
dc.description.degreenameDoctor en Ecologíaspa
dc.description.funderBeca para estudiantes de doctorado Nacionales de COLCIENCIASspa
dc.description.researchareaDendrocronología tropicalspa
dc.format.extentxii, 131 páginasspa
dc.format.mimetypeapplication/pdfspa
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/80415
dc.language.isoengspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellínspa
dc.publisher.departmentDepartamento de Ciencias Forestalesspa
dc.publisher.facultyFacultad de Ciencias Agrariasspa
dc.publisher.placeMedellínspa
dc.publisher.programMedellín - Ciencias Agrarias - Doctorado en Ecologíaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.ddc630 - Agricultura y tecnologías relacionadasspa
dc.subject.lembDendroclimatology
dc.subject.lembDendroclimatología
dc.subject.lembTree-Rings
dc.subject.lembÁrboles - Anillos de crecimiento
dc.subject.proposalBiogeographic Chocó Regioneng
dc.subject.proposalRadiocarboneng
dc.subject.proposalDendrochronologyeng
dc.subject.proposalEver-wet foresteng
dc.subject.proposalTropical treeseng
dc.subject.proposalDendrocronologíaspa
dc.subject.proposalRegión del Chocó Biogeográficospa
dc.subject.proposalIsótopos establesspa
dc.subject.proposalÁrboles tropicalesspa
dc.subject.proposalRadiocarbonospa
dc.titleAnnual tree rings in the rainiest forests of the Americaseng
dc.title.translatedAnillos de crecimeinto anuales en los árboles de la región mas lluviosa de las Américasspa
dc.typeTrabajo de grado - Doctoradospa
dc.type.coarhttp://purl.org/coar/resource_type/c_db06spa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/doctoralThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TDspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentInvestigadoresspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa
oaire.awardtitleProyecto 4083 de la Universidad Nacional de Colombiaspa
oaire.awardtitleProyecto 1118-714-51372 de Colcienciasspa
oaire.awardtitleConvocatoria 785 de Colcienciasspa
oaire.fundernameMincienciasspa
oaire.fundernameUniversidad Nacional de Colombia, Sede Medellínspa
oaire.fundernameInstituto Max Planck para la Biogeoquímicaspa

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