Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/113684
Campo DC Valoridioma
dc.contributor.advisorArístegui Ruiz, Javieres
dc.contributor.authorHernández Hernández, Nauzetes
dc.date.accessioned2022-02-08T13:59:37Z-
dc.date.available2022-02-08T13:59:37Z-
dc.date.issued2022-
dc.identifier.otherTercer Ciclo
dc.identifier.urihttp://hdl.handle.net/10553/113684-
dc.descriptionPrograma de Doctorado en Oceanografía y Cambio Global por la Universidad de Las Palmas de Gran Canariaen_US
dc.description.abstractThis thesis presents novel results on phytoplankton spatiotemporal distribution and variability at submesoscale range, and on the potential effects of climate change over primary productivity in the oligotrophic waters of the Canary region. Phytoplankton growth mainly depends on nutrient and light availability. Highly dynamic oceanic environments are dominated by physical processes that generally alter phytoplankton dynamics by controlling the access to these resources. Mesoscale motions have been considered the most important factor modulating the distribution of biogeochemical properties at the upper levels of the ocean. Nevertheless, recent studies have highlighted the role played by smaller processes that operate below the local Rossby radius of deformation (~40 in the Canary region), referred to here as submesoscale. Due to the inherent complexity of sampling at such high-resolution levels, our knowledge about submesoscale-influenced phytoplankton distribution and variability is mostly constrained to theoretical and modeling studies. In addition, little is known about the fate of meso-submesoscale impacts on phytoplankton communities under climate change stressors. Ocean warming leads to enhanced stratification in the oligotrophic ocean but also to the intensification of cross-shore wind gradients and thus of the eddy kinetic energy across eastern boundary regions of the subtropical gyres. Phytoplankton thriving in a warmer, acidified ocean could then be fertilized by enhanced meso-submesoscale activity. Consequently, meso-submesoscale contribution to global net primary production could be increased. In order to contribute to understand how physical and biogeochemical factors, resolved at a resolution close to submesoscale could affect the spatiotemporal distribution and variability of pico- and nanoplankton, the main components of planktonic communities in the Canary Islands waters, we conducted two interdisciplinary surveys across a highly variable mesoscale field and a submesoscale front south of Gran Canaria island (Canary Island). We found that autotrophic and heterotrophic pico- and nanoplanktonic organisms presented a heterogeneous distribution in response to nutrient inputs caused by meso- and submesoscale processes. On the other hand, temporal variability, which is rarely studied, was found to be a significant source of error in phytoplankton variability. Finally, we have tested the response of three size classes (0.2-2, 2-20 and >20 μm) of subtropical phytoplankton communities in terms of primary production, chlorophyll and cell biomass, to increasing CO2 concentrations and nutrient fertilization during an in situ mesocosm experiment in oligotrophic waters off Gran Canaria. Our results suggest that in a future acidified subtropical ocean, mesoscale and submesoscale features would drive nutrient pumping to the surface ocean favouring the development of diatoms and increasing new production in the global ocean.en_US
dc.languageengen_US
dc.relationRemolinos Oceanicos y de Posición Atmosferica (Roda): Dinámica y Monitorización de Remolinos Oceanicos en la Corriente de Canariasen_US
dc.relationEstudios de la Bomba Vertical Oceánica en Remolinos de Mesoscalaen_US
dc.subject251001 Oceanografía biológicaen_US
dc.titleShort-Term Drivers of Phytoplankton Community Structure and Primary Production in The Canary Current Regiones
dc.typeinfo:eu-repo/semantics/doctoralThesisen_US
dc.typeThesisen_US
dc.bustreaming104507en_US
dc.contributor.centroIU de Oceanografía y Cambio Globalen_US
dc.investigacionCienciasen_US
dc.type2Tesis doctoralen_US
dc.utils.revisionen_US
dc.identifier.matriculaTESIS-1871583es
dc.identifier.ulpgcen_US
dc.contributor.buulpgcBU-BASes
dc.contributor.programaPrograma de Doctorado en Oceanografía y Cambio Global por la Universidad de Las Palmas de Gran Canaria-
item.fulltextCon texto completo-
item.grantfulltextopen-
crisitem.project.principalinvestigatorSangrá Inciarte, Pablo-
crisitem.project.principalinvestigatorSangrá Inciarte, Pablo-
crisitem.advisor.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.advisor.deptIU de Oceanografía y Cambio Global-
crisitem.advisor.deptDepartamento de Biología-
crisitem.author.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.orcid0000-0003-1503-4214-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNameHernandez Hernandez,Nauzet-
Colección:Tesis doctoral
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