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Role of carbonate burial in Blue Carbon budgets

Author

Listed:
  • V. Saderne

    (Red Sea (RSRC) and Computational Bioscience (CBRC) Research Centers)

  • N. R. Geraldi

    (Red Sea (RSRC) and Computational Bioscience (CBRC) Research Centers)

  • P. I. Macreadie

    (Deakin University)

  • D. T. Maher

    (Southern Cross University)

  • J. J. Middelburg

    (Utrecht University)

  • O. Serrano

    (Edith Cowan University)

  • H. Almahasheer

    (Imam Abdulrahman Bin Faisal University (IAU))

  • A. Arias-Ortiz

    (Universitat Autònoma de Barcelona, Bellaterra)

  • M. Cusack

    (Red Sea (RSRC) and Computational Bioscience (CBRC) Research Centers)

  • B. D. Eyre

    (Southern Cross University)

  • J. W. Fourqurean

    (Florida International University)

  • H. Kennedy

    (Bangor University)

  • D. Krause-Jensen

    (Aarhus University
    Aarhus University)

  • T. Kuwae

    (Port and Airport Research Institute)

  • P. S. Lavery

    (Edith Cowan University)

  • C. E. Lovelock

    (The University of Queensland)

  • N. Marba

    (Institut Mediterrani d’Estudis Avançats Miquel Marquès 21)

  • P. Masqué

    (Edith Cowan University
    Universitat Autònoma de Barcelona, Bellaterra
    University of Western Australia)

  • M. A. Mateo

    (Edith Cowan University
    Consejo Superior de Investigaciones Cientificas)

  • I. Mazarrasa

    (Universidad de Cantabria)

  • K. J. McGlathery

    (University of Virginia)

  • M. P. J. Oreska

    (University of Virginia)

  • C. J. Sanders

    (Southern Cross University)

  • I. R. Santos

    (Southern Cross University)

  • J. M. Smoak

    (University of South Florida)

  • T. Tanaya

    (Port and Airport Research Institute)

  • K. Watanabe

    (Port and Airport Research Institute)

  • C. M. Duarte

    (Red Sea (RSRC) and Computational Bioscience (CBRC) Research Centers)

Abstract

Calcium carbonates (CaCO3) often accumulate in mangrove and seagrass sediments. As CaCO3 production emits CO2, there is concern that this may partially offset the role of Blue Carbon ecosystems as CO2 sinks through the burial of organic carbon (Corg). A global collection of data on inorganic carbon burial rates (Cinorg, 12% of CaCO3 mass) revealed global rates of 0.8 TgCinorg yr−1 and 15–62 TgCinorg yr−1 in mangrove and seagrass ecosystems, respectively. In seagrass, CaCO3 burial may correspond to an offset of 30% of the net CO2 sequestration. However, a mass balance assessment highlights that the Cinorg burial is mainly supported by inputs from adjacent ecosystems rather than by local calcification, and that Blue Carbon ecosystems are sites of net CaCO3 dissolution. Hence, CaCO3 burial in Blue Carbon ecosystems contribute to seabed elevation and therefore buffers sea-level rise, without undermining their role as CO2 sinks.

Suggested Citation

  • V. Saderne & N. R. Geraldi & P. I. Macreadie & D. T. Maher & J. J. Middelburg & O. Serrano & H. Almahasheer & A. Arias-Ortiz & M. Cusack & B. D. Eyre & J. W. Fourqurean & H. Kennedy & D. Krause-Jensen, 2019. "Role of carbonate burial in Blue Carbon budgets," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08842-6
    DOI: 10.1038/s41467-019-08842-6
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    Cited by:

    1. Fatima A. Davila-Hernandez & Biao Jin & Harley Pyles & Shuai Zhang & Zheming Wang & Timothy F. Huddy & Asim K. Bera & Alex Kang & Chun-Long Chen & James J. Yoreo & David Baker, 2023. "Directing polymorph specific calcium carbonate formation with de novo protein templates," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Mojtaba Fakhraee & Noah J. Planavsky & Christopher T. Reinhard, 2023. "Ocean alkalinity enhancement through restoration of blue carbon ecosystems," Nature Sustainability, Nature, vol. 6(9), pages 1087-1094, September.

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