Cambios en la red trófica ligados a la pérdida del bosque de ribera en un ecosistema fluvial en la Serranía de La Lindosa (San José Del Guaviare, Colombia)

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dc.contributor.advisorDonato Rondón, John Charlesspa
dc.contributor.advisorGonzalez Trujillo, Juan Davidspa
dc.contributor.authorCórdoba Ariza, Paula Gabrielaspa
dc.date.accessioned2020-07-22T14:43:53Zspa
dc.date.available2020-07-22T14:43:53Zspa
dc.date.issued2020-02spa
dc.description.abstractLa deforestación es un fenómeno que afecta fuertemente la integridad de los ecosistemas acuáticos. Sin embargo, poco se conoce acerca de cómo este proceso influye en las interacciones tróficas de los organismos, especialmente en los trópicos. Las redes tróficas son consideradas como una herramienta para el entendimiento del efecto de los disturbios en los ecosistemas. En el caso de los ríos, permiten comprender las dinámicas entre los ecosistemas fluviales y los ecosistemas terrestres de sus cuencas, evaluando y proponiendo estrategias de mitigación. Esta investigación buscó caracterizar la red trófica de un ecosistema fluvial en la serranía La Lindosa en la temporada seca y de aguas altas, infiriendo el rol de los aportes alóctonos de materia orgánica del bosque de ribera sobre la dinámica trófica de los ecosistemas fluviales, en particular, se buscó responder a la pregunta: ¿Cuáles podrían ser los cambios en las dinámicas tróficas luego de los cambios en la disponibilidad de recursos alóctonos? Esto se llevó a cabo mediante el análisis de isótopos estables en los distintos compartimentos del ecosistema, el cual fue complementado con un análisis de contenidos estomacales en invertebrados acuáticos, crustáceos, anfibios y peces. Herramientas matemáticas para el análisis de las comunidades acuáticas, así como grafos y modelos bayesianos, dilucidaron la importancia de los recursos autóctonos en la dieta de los consumidores tanto en época seca como en temporada de lluvias. No obstante, se reconoció que a través de distintos mecanismos los aportes alóctonos son esenciales para el funcionamiento de los ecosistemas estudiados y podrían incidir de manera indirecta en las dinámicas tróficas. La respuesta a la pregunta de investigación, y culminación exitosa de esta tesis, permitió avanzar hacia el entender y anticipar los complejos cambios que están ocurriendo como consecuencia de la pérdida y degradación del bosque de la ribera en ríos de esta región (Texto tomado de la fuente).spa
dc.description.abstractDeforestation is a phenomenon that affects the integrity of aquatic ecosystems. However, little is known about how this process affects trophic interactions of organisms, especially in the tropics. Food webs are considered as a tool for understanding the effect of disturbances on ecosystems. In the case of streams, they help to understand the dynamics between the riverine ecosystems and the terrestrial ecosystems in their basins, and to assess and propose mitigation and conservation strategies. This project seeks to characterize the food web of a stream located in the Serrania de La Lindosa in the dry and the wet season, inferring the role of allochthonous contributions of organic matter from the riparian forest on the trophic dynamics of streams ecosystems. The aim was to answer the question: Which could be the changes in trophic dynamics and then the changes in the availability of allochthonous resources? This was achieved through analyzing the stable isotopes signatures in the different compartments of the ecosystem and will be complemented by an analysis of gut contents in aquatic invertebrates, crustaceans, amphibians and fishes. Mathematical tools for the analysis of aquatic communities, as well as graphs and Bayesian models, elucidated the importance of autochthonous resources in the diet of consumers both in the dry season and in the wet season. However, it was recognized that through different mechanisms, allochthonous contributions are essential for the functioning of the ecosystems studied and could indirectly influence trophic dynamics. The answer to the research question, and the results of this thesis, allowed us to move forward to a better understanding and to anticipate the complex changes that are occurring due to the loss and degradation of the riparian forest of this region.eng
dc.description.additionalLínea de Investigación: Ecologíaspa
dc.description.degreelevelMaestríaspa
dc.description.projectconvenio 201809, Proyecto No. 4.163spa
dc.description.sponsorshipFundación para la Promoción de la Investigación y la Tecnología (FPIT)spa
dc.format.extent93spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/77820
dc.language.isospaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Biologíaspa
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dc.rightsDerechos reservados - Universidad Nacional de Colombiaspa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.spaAcceso abiertospa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.ddc570 - Biología::577 - Ecologíaspa
dc.subject.proposalDeforestationeng
dc.subject.proposalDeforestaciónspa
dc.subject.proposalModeleng
dc.subject.proposalModelospa
dc.subject.proposalNeotrópicospa
dc.subject.proposalNeotropiceng
dc.subject.proposalAllochthonous subsidieseng
dc.subject.proposalSubsidios alóctonosspa
dc.subject.proposalRecursos autóctonosspa
dc.subject.proposalAutochthonous resourceseng
dc.subject.proposalEscudo Guayanésspa
dc.subject.proposalGuiana Shieldeng
dc.titleCambios en la red trófica ligados a la pérdida del bosque de ribera en un ecosistema fluvial en la Serranía de La Lindosa (San José Del Guaviare, Colombia)spa
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_970fb48d4fbd8a85spa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.versioninfo:eu-repo/semantics/publishedVersionspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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