Acoustics reveals the presence of a macrozooplankton biocline in the Bay of Biscay in response to hydrological conditions and predator-prey relationships.
Article - PLoS ONE - Acoustics reveals the presence of a macrozooplankton biocline in the bay of Biscay in response to hydrological conditions and predator-prey relationships - 2014.pdf
Article - Full Text
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
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
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
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Marine Science Program
Plankton ecology Research Group
Red Sea Research Center (RSRC)
Permanent link to this recordhttp://hdl.handle.net/10754/323588
MetadataShow full item record
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.
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.
SponsorsThis 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.
PublisherPublic Library of Science (PLoS)
PubMed Central IDPMC3913746
- Spatial and temporal distribution of zooplankton related to the environmental conditions in the coral reef lagoon of New Caledonia, Southwest Pacific.
- Authors: Carassou L, Le Borgne R, Rolland E, Ponton D
- Issue date: 2010
- Macrophyte refuges, prey behaviour and trophic interactions: consequences for lake water clarity.
- Authors: Genkai-Kato M
- Issue date: 2007 Feb
- Trophic ecology of Lampanyctus crocodilus on north-west Mediterranean Sea slopes in relation to reproductive cycle and environmental variables.
- Authors: Fanelli E, Papiol V, Cartes JE, Rodriguez-Romeu O
- Issue date: 2014 Jun
- Diel vertical migration and spatial overlap between fish larvae and zooplankton in two tropical lakes, Brazil.
- Authors: Picapedra PH, Lansac-Tôha FA, Bialetzki A
- Issue date: 2015 May
- Damaging UV radiation and invertebrate predation: conflicting selective pressures for zooplankton vertical distribution in the water column of low DOC lakes.
- Authors: Boeing WJ, Leech DM, Williamson CE, Cooke S, Torres L
- Issue date: 2004 Mar