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Small sinking particles control anammox rates in the Peruvian oxygen minimum zone.

  • Academic Journal
  • Karthäuser C; Max Planck Institute for Marine Microbiology, Bremen, Germany.
    Ahmerkamp S; Max Planck Institute for Marine Microbiology, Bremen, Germany. sahmerka@mpi-bremen.de.; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. sahmerka@mpi-bremen.de.
    Marchant HK; Max Planck Institute for Marine Microbiology, Bremen, Germany. hmarchan@mpi-bremen.de.; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. hmarchan@mpi-bremen.de.
    Bristow LA; Max Planck Institute for Marine Microbiology, Bremen, Germany.; Department of Biology, University of Southern Denmark, Odense, Denmark.
    Hauss H; GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany.
    Iversen MH; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany.; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany.
    Kiko R; GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany.; Laboratoire d'Océanographie de Villefranche-sur-Mer, Villefranche-sur-Mer, France.
    Maerz J; Max Planck Institute for Meteorology, Hamburg, Germany.
    Lavik G; Max Planck Institute for Marine Microbiology, Bremen, Germany.
    Kuypers MMM; Max Planck Institute for Marine Microbiology, Bremen, Germany.
  • Nature communications [Nat Commun] 2021 May 28; Vol. 12 (1), pp. 3235. Date of Electronic Publication: 2021 May 28.
  • English
  • Anaerobic oxidation of ammonium (anammox) in oxygen minimum zones (OMZs) is a major pathway of oceanic nitrogen loss. Ammonium released from sinking particles has been suggested to fuel this process. During cruises to the Peruvian OMZ in April-June 2017 we found that anammox rates are strongly correlated with the volume of small particles (128-512 µm), even though anammox bacteria were not directly associated with particles. This suggests that the relationship between anammox rates and particles is related to the ammonium released from particles by remineralization. To investigate this, ammonium release from particles was modelled and theoretical encounters of free-living anammox bacteria with ammonium in the particle boundary layer were calculated. These results indicated that small sinking particles could be responsible for ~75% of ammonium release in anoxic waters and that free-living anammox bacteria frequently encounter ammonium in the vicinity of smaller particles. This indicates a so far underestimated role of abundant, slow-sinking small particles in controlling oceanic nutrient budgets, and furthermore implies that observations of the volume of small particles could be used to estimate N-loss across large areas.
Additional Information
Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: MEDLINE
Original Publication: [London] : Nature Pub. Group
Nitrogen Cycle*
Ammonium Compounds/*metabolism
Bacteria/*metabolism
Nitrogen/*metabolism
Anaerobiosis ; Oceans and Seas ; Oxidation-Reduction ; Peru ; Seawater/chemistry ; Seawater/microbiology
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0 (Ammonium Compounds)
N762921K75 (Nitrogen)
Date Created: 20210529 Date Completed: 20210608 Latest Revision: 20210612
20221216
PMC8163745
10.1038/s41467-021-23340-4
34050175
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