@article{fdi:010062163, title = {{A}coustic reveal the presence of {M}acrozooplankton biocline in the {B}ay of {B}iscay in response to hydrological conditions and predator-prey relationships}, author = {{L}ezama-{O}choa, {A}. and {I}rigoien, {X}. and {C}haigneau, {A}lexis and {Q}uiroz, {Z}. and {L}ebourges {D}haussy, {A}nne and {B}ertrand, {A}rnaud}, editor = {}, language = {{ENG}}, abstract = {{B}ifrequency acoustic data, hydrological measurements and satellite data were used to study the vertical distribution of macrozooplankton in the {B}ay of {B}iscay in relation to the hydrological conditions and fish distribution during spring 2009. {T}he 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. {T}he biocline separated the surface layer, almost devoid of macrozooplankton, from the macrozooplankton-rich deeper layers. {I}t is a specific vertical feature which ties in with the classic diel vertical migration pattern. {S}patiotemporal 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. {R}ather 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. {I}n 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.}, keywords = {{ZOOPLANCTON} ; {REPARTITION} {VERTICALE} ; {PROSPECTION} {ACOUSTIQUE} ; {TELEDETECTION} {SPATIALE} ; {VARIATION} {JOURNALIERE} ; {THERMOHALINE} ; {PRODUCTION} {PRIMAIRE} ; {CHLOROPHYLLE} ; {COUCHE} {EUPHOTIQUE} ; {PREDATEUR} ; {ATLANTIQUE} ; {FRANCE} ; {ESPAGNE} ; {BISCAYE} {BAIE}}, booktitle = {}, journal = {{PL}o{S} {O}ne}, volume = {9}, numero = {2}, pages = {e88054 [12 en ligne]}, ISSN = {1932-6203}, year = {2014}, DOI = {10.1371/journal.pone.0088054}, URL = {https://www.documentation.ird.fr/hor/fdi:010062163}, }