Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/74987
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dc.contributor.authorBach, Lennart Thomasen_US
dc.contributor.authorPaul, Allanah Joyen_US
dc.contributor.authorBoxhammer, Timen_US
dc.contributor.authorvon der Esch, Elisabethen_US
dc.contributor.authorGraco, Michelleen_US
dc.contributor.authorSchulz, Kai Georgen_US
dc.contributor.authorAchterberg, Ericen_US
dc.contributor.authorAguayo, Paulinaen_US
dc.contributor.authorArístegui, Javieren_US
dc.contributor.authorAyón, Patriziaen_US
dc.contributor.authorBaños, Isabelen_US
dc.contributor.authorBernales, Avyen_US
dc.contributor.authorBoegeholz, Anne Sophieen_US
dc.contributor.authorChavez, Franciscoen_US
dc.contributor.authorChavez, Gabrielaen_US
dc.contributor.authorChen, Shao Minen_US
dc.contributor.authorDoering, Kristinen_US
dc.contributor.authorFilella, Albaen_US
dc.contributor.authorFischer, Martinen_US
dc.contributor.authorGrasse, Patriciaen_US
dc.contributor.authorHaunost, Mathiasen_US
dc.contributor.authorHennke, Janen_US
dc.contributor.authorHernández-Hernández, Nauzeten_US
dc.contributor.authorHopwood, Marken_US
dc.contributor.authorIgarza, Maricarmenen_US
dc.contributor.authorKalter, Verenaen_US
dc.contributor.authorKittu, Leilaen_US
dc.contributor.authorKohnert, Peteren_US
dc.contributor.authorLedesma, Jesusen_US
dc.contributor.authorLieberum, Christianen_US
dc.contributor.authorLischka, Silkeen_US
dc.contributor.authorLöscher, Carolinen_US
dc.contributor.authorLudwig, Andreaen_US
dc.contributor.authorMendoza, Ursulaen_US
dc.contributor.authorMeyer, Janaen_US
dc.contributor.authorMeyer, Judithen_US
dc.contributor.authorMinutolo, Fabrizioen_US
dc.contributor.authorCortes, Joaquin Ortizen_US
dc.contributor.authorPiiparinen, Jonnaen_US
dc.contributor.authorSforna, Claudiaen_US
dc.contributor.authorSpilling, Kristianen_US
dc.contributor.authorSanchez, Soniaen_US
dc.contributor.authorSpisla, Carstenen_US
dc.contributor.authorSswat, Michaelen_US
dc.contributor.authorMoreira, Mabel Zavalaen_US
dc.contributor.authorRiebesell, Ulfen_US
dc.date.accessioned2020-10-26T08:15:08Z-
dc.date.available2020-10-26T08:15:08Z-
dc.date.issued2020en_US
dc.identifier.issn1726-4170en_US
dc.identifier.otherScopus-
dc.identifier.urihttp://hdl.handle.net/10553/74987-
dc.description.abstractEastern boundary upwelling systems (EBUS) are among the most productive marine ecosystems on Earth. The production of organic material is fueled by upwelling of nutrient-rich deep waters and high incident light at the sea surface. However, biotic and abiotic factors can modify surface production and related biogeochemical processes. Determining these factors is important because EBUS are considered hotspots of climate change, and reliable predictions of their future functioning requires understanding of the mechanisms driving the biogeochemical cycles therein. In this field experiment, we used in situ mesocosms as tools to improve our mechanistic understanding of processes controlling organic matter cycling in the coastal Peruvian upwelling system. Eight mesocosms, each with a volume of ∼ 55 m3, were deployed for 50 d ∼ 6 km off Callao (12◦ S) during austral summer 2017, coinciding with a coastal El Niño phase. After mesocosm deployment, we collected subsurface waters at two different locations in the regional oxygen minimum zone (OMZ) and injected these into four mesocosms (mixing ratio ≈ 1.5: 1 mesocosm: OMZ water). The focus of this paper is on temporal developments of organic matter production, export, and stoichiometry in the individual mesocosms. The mesocosm phytoplankton communities were initially dominated by diatoms but shifted towards a pronounced dominance of the mixotrophic dinoflagellate (Akashiwo sanguinea) when inorganic nitrogen was exhausted in surface layers. The community shift coincided with a short-term increase in production during the A. sanguinea bloom, which left a pronounced imprint on organic matter C: N: P stoichiometry. However, C, N, and P export fluxes did not increase because A. sanguinea persisted in the water column and did not sink out during the experiment. Accordingly, export fluxes during the study were decoupled from surface production and sustained by the remaining plankton community. Overall, biogeochemical pools and fluxes were surprisingly constant for most of the experiment. We explain this constancy by light limitation through self-shading by phytoplankton and by inorganic nitrogen limitation which constrained phytoplankton growth. Thus, gain and loss processes remained balanced and there were few opportunities for blooms, which represents an event where the system becomes unbalanced. Overall, our mesocosm study revealed some key links between ecological and biogeochemical processes for one of the most economically important regions in the oceans.en_US
dc.languageengen_US
dc.relation.ispartofBiogeosciencesen_US
dc.sourceBiogeosciences [ISSN 1726-4170], v. 17 (19), p. 4831-4852, (Octubre 2020)en_US
dc.subject251001 Oceanografía biológicaen_US
dc.titleFactors controlling plankton community production, export flux, and particulate matter stoichiometry in the coastal upwelling system off Peruen_US
dc.typeinfo:eu-repo/semantics/Articleen_US
dc.typeArticleen_US
dc.identifier.doi10.5194/bg-17-4831-2020en_US
dc.identifier.scopus85092769280-
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dc.identifier.eissn1726-4189-
dc.description.lastpage4852en_US
dc.identifier.issue19-
dc.description.firstpage4831en_US
dc.relation.volume17en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.description.numberofpages22en_US
dc.utils.revisionen_US
dc.date.coverdateOctubre 2020en_US
dc.identifier.ulpgcen_US
dc.description.sjr1,744
dc.description.jcr4,295
dc.description.sjrqQ1
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dc.description.scieSCIE
item.fulltextCon texto completo-
item.grantfulltextopen-
crisitem.author.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptDepartamento de Biología-
crisitem.author.deptGIR IOCAG: Oceanografía Biológica y Algología Aplicada-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptDepartamento de Ciencias Médicas y Quirúrgicas-
crisitem.author.orcid0000-0002-7526-7741-
crisitem.author.orcid0000-0003-1503-4214-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNameArístegui Ruiz, Javier-
crisitem.author.fullNameBaños Cerón, María Isabel-
crisitem.author.fullNameHernandez Hernandez,Nauzet-
crisitem.author.fullNameGalván Sánchez, Sonia Esther-
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