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Temperature and humidity as drivers of the variation of the limit and extension of montane forests and paramo along 40ky in the northwestern Andes of Colombia

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dc.contributor.advisorDuque Montoya, Alvaro Javier
dc.contributor.advisorGonzález Caro, Sebastián
dc.contributor.authorSilva Duque, Andrés Henán
dc.contributor.orcidSilva Duque, Andrés [0009000183768781]
dc.contributor.orcidDuque Montoya, Alvaro Javier [0000000154642058]
dc.contributor.orcidGonzález-Caro, Sebastián [0000000222877431]
dc.contributor.researcher
dc.contributor.researchgroupConservación, Uso y Biodiversidad
dc.date.accessioned2025-12-01T19:01:02Z
dc.date.available2025-12-01T19:01:02Z
dc.date.issued2025-11-27
dc.description.abstractIn this study, conducted in the Belmira paramo in the northwestern Andes of Colombia, we used pollen records to track vegetation changes over the past 40,000 years before present (ky BP). Employing ordination (NMDS), species indicator, and wavelet analysis, we found a pattern of ecosystem change that shifted from a paramo to a tree-dominated community, which became a forest/paramo transitional ecosystem again. At the whole pollen community level, our results revealed spatially synchronous processes (i.e., temporal co-evolution) at regional scales between changes in pollen composition and mean annual temperature (MAT) and Fe concentrations (proxy of humidity). Independent univariate wavelet analyses showed similar periodicities between 500 and 1000 years for MAT and the orthogonal compositional NMDS axes, while Fe exhibited significant variance at longer periodicities, ranging from 2000 to 4000 years. The strong and significant covariation between NMDS II and Fe further confirmed the role of humidity in shaping tree species turnover on cycles of approximately 1,000-2,000 years. However, our study points to the existence of a lag in vegetation tracking to climate change of centuries, which could constitute a major challenge for the implementation of effective nature-based strategies of conservation to ameliorate the ongoing global change.eng
dc.description.abstractEn este estudio, realizado en el páramo de Belmira en los Andes noroccidentales de Colombia, se utilizaron registros de polen para registrar los cambios en la vegetación durante los últimos 40.000 años antes del presente (ky AP). Mediante técnicas de ordenación (NMDS), análisis de especies indicadoras y análisis de wavelets, se identificaron transiciones entre los bosques montanos y los páramos en diferentes periodos de tiempo. En la comunidad vegetal los resultados revelaron procesos espacialmente sincrónicos a escala regional entre los cambios en la composición del polen, la temperatura media anual (MAT) y las concentraciones de Fe (proxy de humedad). Análisis independientes de wavelets univariados mostraron periodicidades similares, entre 500 y 1000 años, tanto para MAT como para los ejes ortogonales de la composición derivados del NMDS, mientras que el Fe exhibió varianza significativa en periodicidades más largas, entre 2000 y 4000 años. La fuerte y significativa covariación entre el eje NMDS II y el Fe confirmó además el papel de la humedad en el recambio de especies arbóreas en ciclos de aproximadamente 1.000–2.000 años. Este estudio señala la existencia de un desfase del orden de 100 años en la respuesta de la vegetación frente al cambio climático, lo cual podría constituir un desafío importante para la implementación de estrategias efectivas de conservación dirigidas a mitigar el cambio global en curso. (Tomado de la fuente)spa
dc.description.curricularareaBosques Y Conservación Ambiental.Sede Medellín
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Bosques y Conservación Ambiental
dc.description.researchareaPaleoecología
dc.format.extent1 recurso en línea (51 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/89167
dc.language.isoeng
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.licenseAtribución-NoComercial 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subject.armarcPáramo de Belmira
dc.subject.ddc570 - Biología::577 - Ecología
dc.subject.proposalPaleoecologíaspa
dc.subject.proposalWaveletseng
dc.subject.proposalLímite de la línea de bosquespa
dc.subject.proposalBelmiraspa
dc.subject.proposalPáramo
dc.subject.wikidataPaleoecología
dc.titleTemperature and humidity as drivers of the variation of the limit and extension of montane forests and paramo along 40ky in the northwestern Andes of Colombiaeng
dc.title.translatedTemperatura y humedad como mecanismos de la variación del limite y extensión de los bosques montanos y el páramo en los Andes noroccidentales de Colombia en los últimos 40 ky añosspa
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.professionaldevelopmentInvestigadores
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2

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Maestría en Bosques y Conservación Ambiental