Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México

8 pages, 1 table, 7 figures

Detalhes bibliográficos
Autores: Cruz-Hernández, Javier, Sánchez-Velasco, Laura, Beier, Emilio, Godínez, Víctor M., Barton, Eric D.
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/201021
Acesso em linha:http://hdl.handle.net/10261/201021
Access Level:acceso abierto
Palavra-chave:Calanoid copepods
Vertical distribution
Frontal zone
Mesoscale
Pacific off Mexico
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spelling Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off MéxicoCruz-Hernández, JavierSánchez-Velasco, LauraBeier, EmilioGodínez, Víctor M.Barton, Eric D.Calanoid copepodsVertical distributionFrontal zoneMesoscalePacific off Mexico8 pages, 1 table, 7 figuresThe distribution of calanoid copepods was investigated in the convergence zone between the California Current Water and Transitional Tropical Water in June 2010 to understand how this zooplankton community responds to mesoscale environmental structure. Hydrographic conditions and zooplankton profiles were measured along two transects which crossed a mesoscale front and adjacent structures, visible in sea surface temperature and ocean color satellite images. The hydrographic structure showed strong temperature (~2 °C) and oxygen (50 μmol kg−1) gradients in the frontal zone (~90 km) associated with a sinking of the thermocline and oxycline, from ~30 m depth in the Transitional Tropical Water, to ~ 90 m depth in the California Current Water. The front was marked by a salinity minimum (<34.3 g kg−1) that sank along the sloping thermocline. High chlorophyll-a concentrations associated with the thermocline were detected in the Transitional Tropical Water, where a cyclonic eddy was defined. These concentrations decreased as the thermocline depth increased. Multivariate analysis defined three calanoid copepod habitats related to the hydrographic structure. A habitat with the highest copepod concentration (24,704 copepods 1000 m−3) was found on the tropical water side associated with a cyclonic eddy. Subeucalanus subtenuis and Centropages furcatus, indicator species, were concentrated between the thermocline (~30 m depth) and the sea surface. On the subtropical water side, where the thermocline was deeper, a habitat with the lowest copepod concentration (3304 copepods 1000 m−3, an order of magnitude smaller), characterized by Euchaeta indica and Centropages elongates, was observed. As an unexpected result, the habitat located in the frontal zone, characterized by Scolecithrix bradyi and Heterorhabdus papilliger had low copepod concentration (4453 copepods.1000 m-3). This low concetration could be due to the steep thermocline slope in the frontal zone, which could cause the thermocline depth to rapidly exceed the photic zone depth, and therefore affect the availability of food for calanoid copepods. It is concluded that the definition of the calanoid copepod habitats, was not only caused by the front itself, but by its interaction with other fine-scale mechanisms that generate oceanographic conditions leading to development of different food webs depending on the structure of water columnThis work was made possible thanks to the financial support of SEP-CONACyT (contracts 2014-236864, LSV), and Fronteras de la Ciencia-CONACyT (contracts 2015-2-280, LSV)Peer reviewedElsevierConsejo Nacional de Ciencia y Tecnología (México)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/201021reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésThe underlying dataset has been published as supplementary material of the article in the publishers platform at DOI https://doi.org/10.1016/j.dsr2.2019.104678https://doi.org/10.1016/j.dsr2.2019.104678Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2010212026-05-22T06:33:51Z
dc.title.none.fl_str_mv Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
title Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
spellingShingle Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
Cruz-Hernández, Javier
Calanoid copepods
Vertical distribution
Frontal zone
Mesoscale
Pacific off Mexico
title_short Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
title_full Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
title_fullStr Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
title_full_unstemmed Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
title_sort Distribution of calanoid copepods across the mesoscale frontal zone of tropical-subtropical convergence off México
dc.creator.none.fl_str_mv Cruz-Hernández, Javier
Sánchez-Velasco, Laura
Beier, Emilio
Godínez, Víctor M.
Barton, Eric D.
author Cruz-Hernández, Javier
author_facet Cruz-Hernández, Javier
Sánchez-Velasco, Laura
Beier, Emilio
Godínez, Víctor M.
Barton, Eric D.
author_role author
author2 Sánchez-Velasco, Laura
Beier, Emilio
Godínez, Víctor M.
Barton, Eric D.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Nacional de Ciencia y Tecnología (México)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Calanoid copepods
Vertical distribution
Frontal zone
Mesoscale
Pacific off Mexico
topic Calanoid copepods
Vertical distribution
Frontal zone
Mesoscale
Pacific off Mexico
description 8 pages, 1 table, 7 figures
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/201021
url http://hdl.handle.net/10261/201021
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv The underlying dataset has been published as supplementary material of the article in the publishers platform at DOI https://doi.org/10.1016/j.dsr2.2019.104678
https://doi.org/10.1016/j.dsr2.2019.104678
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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