Acoustics reveals the presence of a macrozooplankton biocline in the Bay of Biscay in response to hydrological conditions and predator-prey relationships.

Handle URI:
http://hdl.handle.net/10754/323588
Title:
Acoustics reveals the presence of a macrozooplankton biocline in the Bay of Biscay in response to hydrological conditions and predator-prey relationships.
Authors:
Lezama-Ochoa, Ainhoa; Irigoien, Xabier ( 0000-0002-5411-6741 ) ; Chaigneau, Alexis; Quiroz, Zaida; Lebourges-Dhaussy, Anne; Bertrand, Arnaud
Abstract:
Bifrequency acoustic data, hydrological measurements and satellite data were used to study the vertical distribution of macrozooplankton in the Bay of Biscay in relation to the hydrological conditions and fish distribution during spring 2009. The most noticeable result was the observation of a 'biocline' during the day i.e., the interface where zooplankton biomass changes more rapidly with depth than it does in the layers above or below. The biocline separated the surface layer, almost devoid of macrozooplankton, from the macrozooplankton-rich deeper layers. It is a specific vertical feature which ties in with the classic diel vertical migration pattern. Spatiotemporal correlations between macrozooplankton and environmental variables (photic depth, thermohaline vertical structure, stratification index and chlorophyll-a) indicate that no single factor explains the macrozooplankton vertical distribution. Rather a set of factors, the respective influence of which varies from region to region depending on the habitat characteristics and the progress of the spring stratification, jointly influence the distribution. In this context, the macrozooplankton biocline is potentially a biophysical response to the search for a particular depth range where light attenuation, thermohaline vertical structure and stratification conditions together provide a suitable alternative to the need for expending energy in reaching deeper water without the risk of being eaten.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Lezama-Ochoa A, Irigoien X, Chaigneau A, Quiroz Z, Lebourges-Dhaussy A, et al. (2014) Acoustics Reveals the Presence of a Macrozooplankton Biocline in the Bay of Biscay in Response to Hydrological Conditions and Predator-Prey Relationships. PLoS ONE 9: e88054. doi:10.1371/journal.pone.0088054.
Publisher:
Public Library of Science (PLoS)
Journal:
PLoS ONE
Issue Date:
4-Feb-2014
DOI:
10.1371/journal.pone.0088054
PubMed ID:
24505374
PubMed Central ID:
PMC3913746
Type:
Article
ISSN:
1932-6203
Sponsors:
This work was supported by the ECOANCHOA project funded by the Department of Agriculture and Fisheries of the Basque Government and the Ministry of Agriculture, Fishery and Food (MAPA), of the Spanish Government and a grant to AL-O (Technological Centre Foundation). This work has also benefited from the cooperation agreement between the Institut de Recherche pour le Développement and the Instituto del Mar del Perú and from the International Joint Laboratory Dynamics of the Humboldt Current System (LMI DISCOH). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Additional Links:
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0088054; http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3913746/
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLezama-Ochoa, Ainhoaen
dc.contributor.authorIrigoien, Xabieren
dc.contributor.authorChaigneau, Alexisen
dc.contributor.authorQuiroz, Zaidaen
dc.contributor.authorLebourges-Dhaussy, Anneen
dc.contributor.authorBertrand, Arnauden
dc.date.accessioned2014-07-22T10:57:53Z-
dc.date.available2014-07-22T10:57:53Z-
dc.date.issued2014-02-04en
dc.identifier.citationLezama-Ochoa A, Irigoien X, Chaigneau A, Quiroz Z, Lebourges-Dhaussy A, et al. (2014) Acoustics Reveals the Presence of a Macrozooplankton Biocline in the Bay of Biscay in Response to Hydrological Conditions and Predator-Prey Relationships. PLoS ONE 9: e88054. doi:10.1371/journal.pone.0088054.en
dc.identifier.issn1932-6203en
dc.identifier.pmid24505374en
dc.identifier.doi10.1371/journal.pone.0088054en
dc.identifier.urihttp://hdl.handle.net/10754/323588en
dc.description.abstractBifrequency acoustic data, hydrological measurements and satellite data were used to study the vertical distribution of macrozooplankton in the Bay of Biscay in relation to the hydrological conditions and fish distribution during spring 2009. The most noticeable result was the observation of a 'biocline' during the day i.e., the interface where zooplankton biomass changes more rapidly with depth than it does in the layers above or below. The biocline separated the surface layer, almost devoid of macrozooplankton, from the macrozooplankton-rich deeper layers. It is a specific vertical feature which ties in with the classic diel vertical migration pattern. Spatiotemporal correlations between macrozooplankton and environmental variables (photic depth, thermohaline vertical structure, stratification index and chlorophyll-a) indicate that no single factor explains the macrozooplankton vertical distribution. Rather a set of factors, the respective influence of which varies from region to region depending on the habitat characteristics and the progress of the spring stratification, jointly influence the distribution. In this context, the macrozooplankton biocline is potentially a biophysical response to the search for a particular depth range where light attenuation, thermohaline vertical structure and stratification conditions together provide a suitable alternative to the need for expending energy in reaching deeper water without the risk of being eaten.en
dc.description.sponsorshipThis work was supported by the ECOANCHOA project funded by the Department of Agriculture and Fisheries of the Basque Government and the Ministry of Agriculture, Fishery and Food (MAPA), of the Spanish Government and a grant to AL-O (Technological Centre Foundation). This work has also benefited from the cooperation agreement between the Institut de Recherche pour le Développement and the Instituto del Mar del Perú and from the International Joint Laboratory Dynamics of the Humboldt Current System (LMI DISCOH). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.en
dc.language.isoenen
dc.publisherPublic Library of Science (PLoS)en
dc.relation.urlhttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0088054en
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3913746/en
dc.rightsArchived with thanks to PloS oneen
dc.titleAcoustics reveals the presence of a macrozooplankton biocline in the Bay of Biscay in response to hydrological conditions and predator-prey relationships.en
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalPLoS ONEen
dc.identifier.pmcidPMC3913746en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionAZTI-Tecnalia, Marine Research Unit, Pasaia, Basque Country, Spain.en
dc.contributor.institutionIRD, LEGOS, UMR5566 CNES/CNRS/IRD/UPS, Toulouse, France.en
dc.contributor.institutionInstituto del Mar del Perú (IMARPE), Callao, Peru.en
dc.contributor.institutionIRD, UMR LEMAR CNRS/IRD/UBO, Plouzané, France.en
dc.contributor.institutionInstitut de Recherche pour le Développement (IRD), UMR212 EME IFREMER/IRD/UM2, Sète, France.en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorIrigoien, Xabieren
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      Figure S1 - Scatter plots of the correlations between CGmacro and environmental variables (stratification, photic depth and CGfish), in relation to areas (Spanish and French) and ecological domains (inshore-offshore) during the day period. Only significant relationships are presented. Scatter plots include a linear fit (black solid line) to illustrate the sign of the correlation. doi:10.1371/journal.pone.0088054.s001
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      Figure S2 - Scatter plots of the correlations between CGmacro and environmental variables (stratification, chlorophyll-a, and CGfish), in relation to areas (Spanish and French) and ecological domains (inshore-offshore) during the night period. Only significant relationships are presented. Scatter plots include a linear fit (black solid line) to illustrate the sign of the correlation. doi:10.1371/journal.pone.0088054.s002
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      journal.pone.0088054...
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      Figure S3 - Scatter plots of the correlations between biocline and environmental variables (stratification and photic depth), in relation to areas (Spanish and French) and ecological domains (inshore-offshore) during the night period. Only significant relationships are presented. Scatter plots include a linear fit (black solid line) to illustrate the sign of the correlation. doi:10.1371/journal.pone.0088054.s003
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