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Oxygen minimum zone cryptic sulfur cycling sustained by offshore transport of key sulfur oxidizing bacteria

Author

Listed:
  • Cameron M. Callbeck

    (Max Planck Institute for Marine Microbiology
    Swiss Federal Institute of Aquatic Science and Technology (Eawag))

  • Gaute Lavik

    (Max Planck Institute for Marine Microbiology)

  • Timothy G. Ferdelman

    (Max Planck Institute for Marine Microbiology)

  • Bernhard Fuchs

    (Max Planck Institute for Marine Microbiology)

  • Harald R. Gruber-Vodicka

    (Max Planck Institute for Marine Microbiology)

  • Philipp F. Hach

    (Max Planck Institute for Marine Microbiology)

  • Sten Littmann

    (Max Planck Institute for Marine Microbiology)

  • Niels J. Schoffelen

    (Max Planck Institute for Marine Microbiology)

  • Tim Kalvelage

    (Max Planck Institute for Marine Microbiology)

  • Sören Thomsen

    (GEOMAR Helmholtz Centre for Ocean Research)

  • Harald Schunck

    (University of Kiel)

  • Carolin R. Löscher

    (University of Kiel
    University of Southern Denmark)

  • Ruth A. Schmitz

    (University of Kiel)

  • Marcel M. M. Kuypers

    (Max Planck Institute for Marine Microbiology)

Abstract

Members of the gammaproteobacterial clade SUP05 couple water column sulfide oxidation to nitrate reduction in sulfidic oxygen minimum zones (OMZs). Their abundance in offshore OMZ waters devoid of detectable sulfide has led to the suggestion that local sulfate reduction fuels SUP05-mediated sulfide oxidation in a so-called “cryptic sulfur cycle”. We examined the distribution and metabolic capacity of SUP05 in Peru Upwelling waters, using a combination of oceanographic, molecular, biogeochemical and single-cell techniques. A single SUP05 species, U Thioglobus perditus, was found to be abundant and active in both sulfidic shelf and sulfide-free offshore OMZ waters. Our combined data indicated that mesoscale eddy-driven transport led to the dispersal of U T. perditus and elemental sulfur from the sulfidic shelf waters into the offshore OMZ region. This offshore transport of shelf waters provides an alternative explanation for the abundance and activity of sulfide-oxidizing denitrifying bacteria in sulfide-poor offshore OMZ waters.

Suggested Citation

  • Cameron M. Callbeck & Gaute Lavik & Timothy G. Ferdelman & Bernhard Fuchs & Harald R. Gruber-Vodicka & Philipp F. Hach & Sten Littmann & Niels J. Schoffelen & Tim Kalvelage & Sören Thomsen & Harald Sc, 2018. "Oxygen minimum zone cryptic sulfur cycling sustained by offshore transport of key sulfur oxidizing bacteria," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04041-x
    DOI: 10.1038/s41467-018-04041-x
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