Grazing, Temporal Changes of Phytoplankton Concentrations, and the Microbial Loop in the Open Sea

  • Karl Banse
Part of the Environmental Science Research book series (ESRH, volume 43)


With the advent of maps of chlorophyll distribution in the world ocean (Feldman et al., 1989; Lewis, this volume), parochial questions can be asked on a global basis: (1) where, (2) when, and (3) why does phytoplankton occur in the open sea, and (4) how much is found? The first and fourth questions will be addressed briefly at the outset. The paper will treat the second and third questions at length, emphasizing the annual and seasonal time scales. Grazing will be shown to be a key variable that largely has been underrated. In addition to affecting phytoplankton, grazing will be recognized as central to the supply of substrate for the microbial loop.


Mixed Layer Dissolve Organic Matter Dissolve Organic Matter Phytoplankton Growth Euphotic Zone 
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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Karl Banse
    • 1
  1. 1.School of Oceanography, WB-10University of WashingtonSeattleUSA

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