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    Size-dependent photoacclimation of the phytoplankton community in temperate shelf waters (southern Bay of Biscay)

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    Type
    Article
    Authors
    Álvarez, E
    Moran, Xose Anxelu G. cc
    López-Urrutia, Á
    Nogueira, E
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2015-12-09
    Online Publication Date
    2015-12-09
    Print Publication Date
    2016-02-03
    Permanent link to this record
    http://hdl.handle.net/10754/621783
    
    Metadata
    Show full item record
    Abstract
    © Inter-Research 2016. Shelf waters of the Cantabrian Sea (southern Bay of Biscay) are productive ecosystems with a marked seasonality. We present the results from 1 yr of monthly monitoring of the phytoplankton community together with an intensive sampling carried out in 2 contrasting scenarios during the summer and autumn in a mid-shelf area. Stratification was apparent on the shelf in summer, while the water column was comparatively well mixed in autumn. The size structure of the photoautotrophic community, from pico-to micro-phytoplankton, was tightly coupled with the meteo-climatic and hydrographical conditions. Over the short term, variations in the size structure and chlorophyll content of phytoplankton cells were related to changes in the physico-chemical environment, through changes in the availability of nutrients and light. Uncoupling between the dynamics of carbon biomass and chlorophyll resulted in chlorophyll to carbon ratios dependent on body size. The slope of the size dependence of chlorophyll content increased with increasing irradiance, reflecting different photoacclimation plasticity from pico-to micro-phytoplankton. The results have important implications for the productivity and the fate of biogenic carbon in this region, since the size dependence of photosynthetic rates is directly related to the size scaling of chlorophyll content.
    Citation
    Álvarez E, Morán X, López-Urrutia Á, Nogueira E (2016) Size-dependent photoacclimation of the phytoplankton community in temperate shelf waters (southern Bay of Biscay). Mar Ecol Prog Ser 543: 73–87. Available: http://dx.doi.org/10.3354/meps11580.
    Sponsors
    We thank the captain and crew of RVs 'Francisco de Paula Navarro' and 'Jose Rioja' and all participants in the cruises for their work and dedication at sea and in the laboratory. We also thank F. Ronzon, who kindly provided data from his meteorological station in Gijon/Xixon. This work was supported by the Ministerio de Ciencia e Innovacion (project PERPLAN, 'Efecto de las perturbaciones meteorologico-hidrograficas en la estructura de la comunidad planctonica', CTM2006-04854/MAR), the Plan de Ciencia, Tecnologia e Innovacion del Gobierno del Principado de Asturias (project IMAGINA and research grant BP07-081 to E.A.), the Instituto Espanol de Oceanografia (project RADIALES) and the Principado de Asturias FEDER (GRUPIN14-144).
    Publisher
    Inter-Research Science Center
    Journal
    Marine Ecology Progress Series
    DOI
    10.3354/meps11580
    ae974a485f413a2113503eed53cd6c53
    10.3354/meps11580
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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