Potential cobalt limitation of vitamin B<sub>12</sub> synthesis in the North Atlantic Ocean

DOI Web Site Web Site 被引用文献2件
  • C. Panzeca
    School of Marine and Atmospheric Sciences Stony Brook University Stony Brook New York USA
  • A. J. Beck
    School of Marine and Atmospheric Sciences Stony Brook University Stony Brook New York USA
  • K. Leblanc
    Laboratoire d'Océanographie et de Biogéochimie CNRS/Université de la Méditerranée, OSU/Centre d'Océanologie de Marseille, Campus de Luminy Marseille Cedex France
  • G. T. Taylor
    School of Marine and Atmospheric Sciences Stony Brook University Stony Brook New York USA
  • D. A. Hutchins
    Department of Biological Sciences University of Southern California Los Angeles California USA
  • S. A. Sañudo‐Wilhelmy
    Department of Biological Sciences University of Southern California Los Angeles California USA

書誌事項

公開日
2008-06
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2007gb003124
公開者
American Geophysical Union (AGU)

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説明

<jats:p>While recent studies have confirmed the ecological importance of vitamin B<jats:sub>12</jats:sub>, it is unclear whether the production of this vitamin could be limited by dissolved Co, a trace metal required for B<jats:sub>12</jats:sub> biosynthesis, but found at only subnanomolar concentrations in the open ocean. Herein, we demonstrate that the spatial distribution of dissolved B<jats:sub>12</jats:sub> (range: 0.13–5 pmol L<jats:sup>−1</jats:sup>) in the North Atlantic Ocean follows the abundance of total dissolved Co (range: 15–81 pmol L<jats:sup>−1</jats:sup>). Similar patterns were observed for bacterial productivity (range: 20–103 pmol <jats:sup>3</jats:sup>H leucine L<jats:sup>−1</jats:sup> hr<jats:sup>−1</jats:sup>) and algal biomass (range: 0.4–3.9 <jats:italic>μ</jats:italic>g L<jats:sup>−1</jats:sup>). In contrast, vitamin B<jats:sub>1</jats:sub> concentrations (range: 0.7–30 pM) were decoupled from both Co and B<jats:sub>12</jats:sub> concentrations. Cobalt amendment experiments carried out in low‐dissolved Co waters (∼20 pmol L<jats:sup>−1</jats:sup>) enhanced B<jats:sub>12</jats:sub> production two‐fold over unamended controls. This study provides evidence that B<jats:sub>12</jats:sub> synthesis could be limited by the availability of Co in some regions of the world ocean.</jats:p>

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