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dc.date.accessioned 2020-08-07T18:18:14Z
dc.date.available 2020-08-07T18:18:14Z
dc.date.issued 2018-12
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/101706
dc.description.abstract Little is known about the base of the food web that could support the high productivity and marine biodiversity found in San Jorge Gulf, Patagonia, Argentina. Here we examine the key components of the microbial food web, including the standing stock and physiological state of the phytoplankton in the context of key oceanographic variables in the gulf. Water samples were collected at 16 stations for biological and chemical analyses, together with measurements of vertical structure and currents. The dynamics of the water column and its impact on nutrient availability for primary producers was evaluated. Our results show that, in spite of the observed low surface nutrient concentrations and low biomass, phytoplankton cells were in good physiological state. This is possible because nutrients are replenished at the pycnocline depth, as estimated by means of Richardson’s dynamic stability. Turbulence created by tides and the shear between overlapping water masses favors the disruption of the pycnocline. We suggest that, during summer, San Jorge Gulf maintains not only high primary productivity but also high phytoplankton biomass turnover rate, which is supported by a high C:N ratio, consistent with strong zooplankton grazing and export of organic carbon to deep waters. en
dc.format.extent 50-59 es
dc.language en es
dc.subject Argentine Sea es
dc.subject Phytoplankton es
dc.subject Water column structure es
dc.subject Nitrate es
dc.subject San Jorge Gulf es
dc.title Mixing processes at the pycnocline and vertical nitrate supply: consequences for the microbial food web in San Jorge Gulf, Argentina en
dc.type Articulo es
sedici.identifier.uri https://ri.conicet.gov.ar/11336/89753 es
sedici.identifier.uri https://tos.org/oceanography/article/mixing-processes-at-the-pycnocline-and-vertical-nitrate-supply-consequences es
sedici.identifier.other https://doi.org/10.5670/oceanog.2018.410 es
sedici.identifier.other hdl:11336/89753 es
sedici.identifier.issn 1042-8275 es
sedici.creator.person Latorre, Maite Pilmayquen es
sedici.creator.person Schloss, Irene Ruth es
sedici.creator.person Almandoz, Gastón Osvaldo es
sedici.creator.person Lemarchand, Karine es
sedici.creator.person Flores Melo, Elizabeth Ximena es
sedici.creator.person Massé Beaulne, Valérie es
sedici.creator.person Ferreyra, Gustavo Adolfo es
sedici.subject.materias Ciencias Naturales es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Naturales y Museo es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution 4.0 International (CC BY 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Oceanography es
sedici.relation.journalVolumeAndIssue vol. 31, no. 4 es

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Creative Commons Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0)