Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/74800
Campo DC Valoridioma
dc.contributor.advisorArístegui Ruiz, Javieres
dc.contributor.advisorGonzález Ramos, Antonio Juanes
dc.contributor.authorGómez Letona, Markeles
dc.date.accessioned2020-10-16T11:56:58Z-
dc.date.available2020-10-16T11:56:58Z-
dc.date.issued2017en_US
dc.identifier.urihttp://hdl.handle.net/10553/74800-
dc.description.abstractThe eruption of a submarine volcano south of El Hierro (Canary Islands) in October 2011 led to major physical-chemical changes in the environment. Significant amounts of iron and inorganic nutrients were introduced to the water column from the oxidation of reduced chemical species expelled during the eruptive phase. It has been stated that the environmental fertilization with these compounds enabled the rapid restoration of the ecosystem once the volcanic activity ceased, although no biological evidence for this has been provided yet. To test the biological fertilization hypothesis on the pelagic ecosystem, we studied the evolution and variability in chlorophyll a (from in situ and remote sensing data) combined with information on phytoplankton and bacteria community structure (derived from Flow Cytometry) during and after the eruptive episode (from November 2011 to March 2014). Remote sensing and in situ data revealed that no algal bloom took place neither during nor after the eruptive episode. High satellite chl-a values registered during the eruptive phase corresponded to decoloured waters caused by sulphur compounds expelled by the volcano. In situ measurements of chl-a were low, in the range of the natural annual variability reported in the literature, with no significant differences between stations affected by the volcano and stations on the far field. Spatial and temporal variability in picophytoplankton (Picoeukaryotes, and Synechococcus and Prochlorococcus cyanobacteria), the most abundant size-fraction of the phytoplankton community, didn’t show any response to the volcanic emissions. Only the high nucleic acid (HNA)-content bacteria (the most active groups) exhibited significantly high abundances during the most intense eruptive phase, but values were restored after the eruption ceased. Overall, our results show that the impact of the eruption on the phytoplankton community was not significant, without any evidence of biological fertilization on the pelagic ecosystem, probably due to an efficient renewal of surface waters in the region due to local currents. Temporal changes in chl-a close to the volcano area were caused by seasonal variability in the region, as well as to interannual variability associated with changes in the North Atlantic Oscillation (NAO) phases.en_US
dc.languageengen_US
dc.subject251001 Oceanografía biológicaen_US
dc.subject250616 Teledetección (Geología)en_US
dc.subject.otherSubmarine eruptiones
dc.subject.otherFertilizationes
dc.subject.otherPicophytoplanktones
dc.subject.otherBacterioplanktones
dc.subject.otherChl-aes
dc.titleDid the submarine volcanic eruption of El Hierro (Canary Islands) lead to a biological fertilization of the planktonic community? : evidences from "in situ" and remote sensing data in the phytoplanktonic communityes
dc.typeinfo:eu-repo/semantics/masterThesisen_US
dc.typeMasterThesisen_US
dc.contributor.centroIU de Oceanografía y Cambio Globalen_US
dc.contributor.departamentoDepartamento de Biologíaes
dc.contributor.facultadFacultad de Ciencias del Maren_US
dc.investigacionCienciasen_US
dc.type2Trabajo final de másteren_US
dc.description.notasMáster Universitario en Oceanografía ; 2016-2017en_US
dc.utils.revisionen_US
dc.identifier.matriculaTFT-42333es
dc.identifier.ulpgcen_US
dc.contributor.buulpgcBU-BASes
dc.contributor.titulacionMáster Universitario en Oceanografía por la Universidad de Cádiz, la Universidad de Las Palmas de Gran Canaria y la Universidad de Vigoes
item.fulltextCon texto completo-
item.grantfulltextopen-
crisitem.advisor.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.advisor.deptIU de Oceanografía y Cambio Global-
crisitem.advisor.deptDepartamento de Biología-
crisitem.advisor.deptGIR ECOAQUA: Biodiversidad y Conservación-
crisitem.advisor.deptIU de Investigación en Acuicultura Sostenible y Ec-
crisitem.advisor.deptDepartamento de Biología-
crisitem.author.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNameGómez Letona,Markel-
Colección:Trabajo final de máster
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