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    Variability of mesozooplankton biomass and individual size in <em>a</em> coast-offshore transect in the Catalan Sea: relationships with chlorophyll <em>a</em> and hydrographic features

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    Type
    Article
    Authors
    Alcaraz, Miquel
    Calbet, Albert
    Isari, Stamatina cc
    Irigoien, Xabier cc
    Trepat, Isabel
    Saiz, Enric
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2016-10-07
    Online Publication Date
    2016-10-07
    Print Publication Date
    2016-09-30
    Permanent link to this record
    http://hdl.handle.net/10754/621896
    
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    Abstract
    The temporal and spatial changes of zooplankton and chlorophyll a concentration were studied during the warm stratification period (early June) at three stations whose traits corresponded to the coastal, frontal, and offshore-dome water conditions described for the Catalan Sea. We sampled the stations for 12 days at a frequency ranging from less than 10 to 102 h, with a spatial resolution ranging from 10 to 104 m. The objective was to determine the variability of mesozooplankton and phytoplankton (chlorophyll a) biomass, and average individual size (mass) across a coast-offshore transect in relation to the stratification conditions prevailing in the NW Mediterranean during summer. The vertical distribution of phytoplankton biomass displayed a clear deep maximum at 60 m depth except at the coastal station. This maximum exists during most of the year and is especially important during the density stratification period. It was accompanied during daylight hours by a coherent zooplankton maximum. At sunset mesozooplankton ascended and dispersed, with larger organisms from deeper layers joining the migrating community and increasing the average individual mass. The highest variability of mesozooplankton biomass, individual mass and chlorophyll a concentration occurred at the front station due to the coupling between the vertical migration of zooplankton and the particular characteristics of the front. According to the data shown, the highest variability was observed at the lowest scales.
    Citation
    Alcaraz M, Calbet A, Isari S, Irigoien X, Trepat I, et al. (2016) Variability of mesozooplankton biomass and individual size in <em>a</em> coast-offshore transect in the Catalan Sea: relationships with chlorophyll <em>a</em> and hydrographic features. Scientia Marina 80: 79–87. Available: http://dx.doi.org/10.3989/scimar.04353.15A.
    Sponsors
    We are deeply grateful to Marta Estrada for her friendship, stimulating inspiration and collaboration over almost five decades. This paper is intended as a small homage to her kind and inspired leadership. The VARIMED-95 cruise took place in the framework of the Spanish research project AMB94-1019 from the Ministry of Science to M. Alcaraz. Financial support was also provided by the projects MAR98-0854 and CTM2006-12344-c02 to M.A., TOPCOP-CTM2011-23480 to E. Saiz and FERMI (CGL2014-59227-R) to AC and ES. The authors are indebted to all the participants in the VARIMED-95 cruise, and to the crew of the RV Hespérides. This is a contribution of the Marine Zooplankton Ecology Research Group of the Generalitat de Catalunya (2014 SGR 498).
    Publisher
    Editorial CSIC
    Journal
    Scientia Marina
    DOI
    10.3989/scimar.04353.15A
    Additional Links
    http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1659/2138
    ae974a485f413a2113503eed53cd6c53
    10.3989/scimar.04353.15A
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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