• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • WHOI Technical Reports
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • WHOI Technical Reports
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Relationships between oceanic epizooplankton distributions and the seasonal deep chlorophyll maximum in the northwestern Atlantic Ocean

    Thumbnail
    View/Open
    WHOI 81-26.pdf (7.132Mb)
    Date
    1981-04
    Author
    Ortner, Peter B.  Concept link
    Wiebe, Peter  Concept link
    Cox, James L.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/10245
    DOI
    10.1575/1912/10245
    Keyword
     Zooplankton; Chlorophyll; Gulf Stream 
    Abstract
    The potential significance of the Deep Chlorophyll Maximum (DCM) as a food resource for pelagic food chains was studied in three hydrographic regimes of the Northwestern Atlantic Ocean: the Slope Water, the Northern Sargasso Sea and a Gulf Stream cold core ring. Samples for phytoplankton species, chlorophyll and related water chemistry were obtained with a series of water bottle casts from the upper 200 m; microzooplankton and macrozooplankton were also obtained in the upper 200 m with Clarke Bumpus (67 m mesh) and MOCNESS (333 m mesh) net systems. Samples were obtained in the summer when the DCM was well developed and in the fall when mixing had erased the DCM in most areas. Total zooplankton biomass was significantly enhanced within depth intervals including or adjacent to the seasonal thermocline in the three hydrographic areas. Hydrocast data show the DCM in these regions was predictably associated with the seasonal thermocline. Thus these data indicate zooplankton biomass was enhanced about the DCM when it was present. In some cases, the zooplankton assemblage at DCM depths was distinguishable from those both at deeper and more shallow depths and its composition appeared related to the food available at DCM depths. Overall, in environments ranging from moderately rich near-shore Slope Waters to the more oligotrophic open-ocean Sargasso Sea, our data suggest that the DCM signals a depth zone of particularly intense trophic activity.
    Description
    Also published as: Journal of Marine Research 38 (1980): 507-531
    Collections
    • Biology
    • WHOI Technical Reports
    Suggested Citation
    Ortner, P. B., Wiebe, P., & Cox, J. L. (1981). Relationships between oceanic epizooplankton distributions and the seasonal deep chlorophyll maximum in the northwestern Atlantic Ocean. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10245
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Regional variations in the influence of mesoscale eddies on near-surface chlorophyll 

      Gaube, Peter; McGillicuddy, Dennis J.; Chelton, Dudley B.; Behrenfeld, Michael J.; Strutton, Peter G. (John Wiley & Sons, 2014-12-01)
      Eddies can influence biogeochemical cycles through a variety of mechanisms, including the excitation of vertical velocities and the horizontal advection of nutrients and ecosystems, both around the eddy periphery by ...
    • Thumbnail

      Satellite observations of chlorophyll, phytoplankton biomass, and Ekman pumping in nonlinear mesoscale eddies 

      Gaube, Peter; Chelton, Dudley B.; Strutton, Peter G.; Behrenfeld, Michael J. (John Wiley & Sons, 2013-12-02)
      Nonlinear mesoscale eddies can influence biogeochemical cycles in the upper ocean through vertical and horizontal advection of nutrients and marine organisms. The relative importance of these two processes depends on the ...
    • Thumbnail

      Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current 

      Song, Hajoon; Long, Matthew C.; Gaube, Peter; Frenger, Ivy; Marshall, John; McGillicuddy, Dennis J. (John Wiley & Sons, 2018-05-30)
      The Antarctic Circumpolar Current has highly energetic mesoscale phenomena, but their impacts on phytoplankton biomass, productivity, and biogeochemical cycling are not understood well. We analyze satellite observations ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo