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Response of N2O production rate to ocean acidification in the western North Pacific

Author

Listed:
  • Florian Breider

    (Tokyo Institute of Technology
    Ecole Polytechnique Fédérale de Lausanne)

  • Chisato Yoshikawa

    (Japan Agency of Marine-Earth Science and Technology)

  • Akiko Makabe

    (Japan Agency of Marine-Earth Science and Technology)

  • Sakae Toyoda

    (Tokyo Institute of Technology)

  • Masahide Wakita

    (Japan Agency of Marine Earth Science and Technology)

  • Yohei Matsui

    (The University of Tokyo)

  • Shinsuke Kawagucci

    (Japan Agency of Marine-Earth Science and Technology)

  • Tetsuichi Fujiki

    (Japan Agency of Marine Earth Science and Technology)

  • Naomi Harada

    (Japan Agency of Marine Earth Science and Technology)

  • Naohiro Yoshida

    (Tokyo Institute of Technology
    Tokyo Institute of Technology
    Tokyo Institute of Technology)

Abstract

Ocean acidification, induced by the increase in anthropogenic CO2 emissions, has a profound impact on marine organisms and biogeochemical processes1. The response of marine microbial activities to ocean acidification might play a crucial role in the future evolution of air–sea fluxes of biogenic gases such as nitrous oxide (N2O), a strong GHG and the dominant stratospheric ozone-depleting substance2. Here, we examine the response of N2O production from nitrification to acidification in a series of incubation experiments conducted in subtropical and subarctic western North Pacific. The experiments show that when pH was reduced, the N2O production rate during nitrification measured at subarctic stations increased significantly while nitrification rates remained stable or decreased. Contrary to previous findings, these results suggest that the effect of ocean acidification on N2O production during nitrification and nitrification rates are probably uncoupled. Collectively, these results suggest that if seawater pH continues to decline at the same rate, ocean acidification could increase marine N2O production during nitrification in the subarctic North Pacific by 185 to 491% by the end of the century.

Suggested Citation

  • Florian Breider & Chisato Yoshikawa & Akiko Makabe & Sakae Toyoda & Masahide Wakita & Yohei Matsui & Shinsuke Kawagucci & Tetsuichi Fujiki & Naomi Harada & Naohiro Yoshida, 2019. "Response of N2O production rate to ocean acidification in the western North Pacific," Nature Climate Change, Nature, vol. 9(12), pages 954-958, December.
  • Handle: RePEc:nat:natcli:v:9:y:2019:i:12:d:10.1038_s41558-019-0605-7
    DOI: 10.1038/s41558-019-0605-7
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    Cited by:

    1. Guang He & Gao Chen & Yongchao Xie & Cynthia M. Swift & Diana Ramirez & Gyuhyon Cha & Konstantinos T. Konstantinidis & Mark Radosevich & Frank E. Löffler, 2024. "Sustained bacterial N2O reduction at acidic pH," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. Jie Zhou & Yanling Zheng & Lijun Hou & Zhirui An & Feiyang Chen & Bolin Liu & Li Wu & Lin Qi & Hongpo Dong & Ping Han & Guoyu Yin & Xia Liang & Yi Yang & Xiaofei Li & Dengzhou Gao & Ye Li & Zhanfei Li, 2023. "Effects of acidification on nitrification and associated nitrous oxide emission in estuarine and coastal waters," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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