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dc.contributor.authorPérez Barrancos, Claudiaen_US
dc.contributor.authorGelado Caballero, María Doloresen_US
dc.contributor.authorHernández Hernández, N.en_US
dc.contributor.authorBaños-Cerón, Isabelen_US
dc.contributor.authorGómez Letona, Markelen_US
dc.contributor.authorMontero del Pino, María F.en_US
dc.contributor.authorArrieta, J. M.en_US
dc.contributor.authorArístegui Ruiz, Javieren_US
dc.description.abstractThe eastern North Atlantic region is among the highest receivers of dust deposition in the world oceans, which is an important source of nutrients, trace metals and organic matter to the surface ocean. In this study, we assessed the response of phytoplankton and heterotrophic bacteria to intense dust deposition in the Mauritanian-Senegalese upwelling system. Four bioassays were performed, each lasting three days, along a trophic gradient extending from the eutrophic coastal upwelling to the oligotrophic open sea . On each occasion, dust concentrations above 4 mg l-1 were added to triplicate microcosms, increasing nitrate, phosphate and, to a lesser extent, silicate seawater concentrations. Even though dust deposition enhanced heterotrophic and photosynthetic activity concurrently, bacterial production rates responded faster and stronger than primary production especially as oligotrophic conditions increased. Although not always reflected in total microbial cell abundances, dust enrichment also stimulated the growth of certain planktonic groups over others according to their nutrient requirements. High silica content phytoplankton groups (such as Dinophyceae, Chrysophyceae and Filosa-Thecofilosea) thrived in dust-treated microcosms, as well as Hyphomonas type of Alphaproteobacteria and several Gammaproteobacteria orders (including Alteromonadales, OM182_clade and Ectothiorhodospirales). Yet, microbial community structure and composition were primarily shaped by the unique characteristics of each experiment (intrinsic local productivity and nutrient availability), as well as by trophic interactions across autotrophic and heterotrophic microbial communities.en_US
dc.publisherServicio de Publicaciones y Difusión Científica de la Universidad de Las Palmas de Gran Canaria (ULPGC)en_US
dc.sourceAbstracts Volume VIII International Symposium on Marine Sciences, July 2022 / coordinación, María Esther Torres Padrón, p. 58en_US
dc.subject251001 Oceanografía biológicaen_US
dc.subject.otherDust bioassayen_US
dc.subject.otherPrimary productionen_US
dc.subject.otherBacterial productionen_US
dc.subject.otherPlankton community structureen_US
dc.subject.otherMolecular diversityen_US
dc.subject.otherSubtropical Northeast Atlanticen_US
dc.titlePhytoplankton and heterotrophic bacteria response to atmospheric dust deposition in the Mauritanian-Senegalese upwelling regionen_US
dc.relation.conferenceVIII International Symposium on Marine Sciences (ISMS 2022)en_US
item.fulltextCon texto completo-
crisitem.event.eventsenddate08-07-2022- Tecnologías, Gestión y Biogeoquímica Ambiental- de Química- IOCAG: Oceanografía Biológica y Algología Aplicada- de Oceanografía y Cambio Global- IOCAG: Oceanografía Biológica y Algología Aplicada- de Oceanografía y Cambio Global- de Biología- IOCAG: Oceanografía Biológica y Algología Aplicada- de Oceanografía y Cambio Global- de Biología- de Química- de Oceanografía y Cambio Global- de Oceanografía y Cambio Global- de Oceanografía y Cambio Global-érez Barrancos, Claudia- Caballero, María Dolores-ños Cerón, María Isabel-ómez Letona, Markel- Del Pino, María Fernanda-ístegui Ruiz, Javier-
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