Spatial patterns and scale-dependent relationships between macrozooplankton and fish in the Bay of Biscay: an acoustic study

Handle URI:
http://hdl.handle.net/10754/323577
Title:
Spatial patterns and scale-dependent relationships between macrozooplankton and fish in the Bay of Biscay: an acoustic study
Authors:
Lezama-Ochoa, A; Ballón, M; Woillez, M; Grados, D; Irigoien, Xabier ( 0000-0002-5411-6741 ) ; Bertrand, A
Abstract:
Macrozooplankton plays a key role in pelagic ecosystems as a link between lower trophic levels and fish. However, although its ecological role is usually considered in polar ecosystems, it is rarely considered in temperate ones. To obtain comprehensive information on the macrozooplankton distribution in the Bay of Biscay we adapted a bi-frequency acoustic method developed for the Humboldt Current system. This method can be used to extract continuous and simultaneous high-resolution information on the spatiotemporal patterns of biomass distributions of macrozooplankton and pelagic fish throughout the diel cycle. The 2 distributions were mapped using geostatistical techniques. We applied kriging with external drifts, which accounts for both diel and across-shore changes in macrozooplankton biomass. We then used a cross-variogram to determine the scale-dependent relationships between macrozooplankton and fish. The results show how macrozooplankton and fish are distributed according to the different ecological domains (coast, shelf, shelf-break and offshore) along the Spanish and French coasts. Specific macrozooplankton hotspots were observed, but macrozooplankton was generally more abundant offshore than inshore, whereas fish showed the opposite trend. This pattern was confirmed by the aggregation sizes, which increased towards oceanic waters for macrozooplankton and decreased for fish. Finally, the correlation between fish and macrozooplankton was positive on a small scale (<30 nautical miles) and negative on a large scale (>30 nautical miles).
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Lezama-Ochoa A, Ballón M, Woillez M, Grados D, Irigoien X, et al. (2011) Spatial patterns and scale-dependent relationships between macrozooplankton and fish in the Bay of Biscay: an acoustic study. Mar Ecol Prog Ser 439: 151-168. doi:10.3354/meps09318.
Publisher:
Inter-Research Science Center
Journal:
Marine Ecology Progress Series
Issue Date:
20-Oct-2011
DOI:
10.3354/meps09318
Type:
Article
ISSN:
0171-8630; 1616-1599
Additional Links:
http://www.int-res.com/abstracts/meps/v439/p151-168/
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLezama-Ochoa, Aen
dc.contributor.authorBallón, Men
dc.contributor.authorWoillez, Men
dc.contributor.authorGrados, Den
dc.contributor.authorIrigoien, Xabieren
dc.contributor.authorBertrand, Aen
dc.date.accessioned2014-07-22T10:32:45Z-
dc.date.available2014-07-22T10:32:45Z-
dc.date.issued2011-10-20en
dc.identifier.citationLezama-Ochoa A, Ballón M, Woillez M, Grados D, Irigoien X, et al. (2011) Spatial patterns and scale-dependent relationships between macrozooplankton and fish in the Bay of Biscay: an acoustic study. Mar Ecol Prog Ser 439: 151-168. doi:10.3354/meps09318.en
dc.identifier.issn0171-8630en
dc.identifier.issn1616-1599en
dc.identifier.doi10.3354/meps09318en
dc.identifier.urihttp://hdl.handle.net/10754/323577en
dc.description.abstractMacrozooplankton plays a key role in pelagic ecosystems as a link between lower trophic levels and fish. However, although its ecological role is usually considered in polar ecosystems, it is rarely considered in temperate ones. To obtain comprehensive information on the macrozooplankton distribution in the Bay of Biscay we adapted a bi-frequency acoustic method developed for the Humboldt Current system. This method can be used to extract continuous and simultaneous high-resolution information on the spatiotemporal patterns of biomass distributions of macrozooplankton and pelagic fish throughout the diel cycle. The 2 distributions were mapped using geostatistical techniques. We applied kriging with external drifts, which accounts for both diel and across-shore changes in macrozooplankton biomass. We then used a cross-variogram to determine the scale-dependent relationships between macrozooplankton and fish. The results show how macrozooplankton and fish are distributed according to the different ecological domains (coast, shelf, shelf-break and offshore) along the Spanish and French coasts. Specific macrozooplankton hotspots were observed, but macrozooplankton was generally more abundant offshore than inshore, whereas fish showed the opposite trend. This pattern was confirmed by the aggregation sizes, which increased towards oceanic waters for macrozooplankton and decreased for fish. Finally, the correlation between fish and macrozooplankton was positive on a small scale (<30 nautical miles) and negative on a large scale (>30 nautical miles).en
dc.language.isoenen
dc.publisherInter-Research Science Centeren
dc.relation.urlhttp://www.int-res.com/abstracts/meps/v439/p151-168/en
dc.rightsArchived with thanks to Marine Ecology Progress Seriesen
dc.titleSpatial patterns and scale-dependent relationships between macrozooplankton and fish in the Bay of Biscay: an acoustic studyen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalMarine Ecology Progress Seriesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionAZTI-Tecnalia, Marine Research Unit, Herrera Kaia Portualdea z/g, 20110 Pasaia, Basque Country, Spainen
dc.contributor.institutionInstituto del Mar del Perú, Esquina Gamarra y Gral. Valle s/n, Apartado 22, Callao, Lima, Peruen
dc.contributor.institutionInstitut de Recherche pour le Développement (IRD), UMR212 EME IFREMER/IRD/UM2, Avenue Jean Monnet, BP 171, 34203 Sète Cedex, Franceen
dc.contributor.institutionUniversity of Washington, School of Aquatic and Fishery Sciences, Box 355020, Seattle, WA 98195, United Statesen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorIrigoien, Xabieren
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