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Soil carbon in the world’s tidal marshes

Author

Listed:
  • Tania L. Maxwell

    (University of Cambridge
    International Institute for Applied Systems Analysis (IIASA))

  • Mark D. Spalding

    (University of Cambridge
    The Nature Conservancy)

  • Daniel A. Friess

    (Tulane University)

  • Nicholas J. Murray

    (James Cook University)

  • Kerrylee Rogers

    (University of Wollongong)

  • Andre S. Rovai

    (U.S. Army Engineer Research and Development Center
    Louisiana State University)

  • Lindsey S. Smart

    (The Nature Conservancy
    NC State University)

  • Lukas Weilguny

    (Wellcome Genome Campus)

  • Maria Fernanda Adame

    (Griffith University)

  • Janine B. Adams

    (Nelson Mandela University
    Nelson Mandela University)

  • William E. N. Austin

    (University of St Andrews
    Scottish Association of Marine Science)

  • Margareth S. Copertino

    (Federal University of Rio Grande (FURG)
    Brazilian Network of Climate Change Studies—Rede CLIMA)

  • Grace M. Cott

    (University College Dublin)

  • Micheli Duarte de Paula Costa

    (Deakin University)

  • James R. Holmquist

    (Smithsonian Environmental Research Center)

  • Cai J. T. Ladd

    (Swansea University
    Bangor University)

  • Catherine E. Lovelock

    (The University of Queensland)

  • Marvin Ludwig

    (University of Münster)

  • Monica M. Moritsch

    (Santa Cruz)

  • Alejandro Navarro

    (James Cook University)

  • Jacqueline L. Raw

    (Nelson Mandela University
    Anthesis South Africa)

  • Ana-Carolina Ruiz-Fernández

    (Unidad Académica Mazatlán)

  • Oscar Serrano

    (Centro de Estudios Avanzados de Blanes (CEAB))

  • Craig Smeaton

    (University of St Andrews)

  • Marijn Broek

    (Swiss Federal Institute of Technology (ETH Zürich))

  • Lisamarie Windham-Myers

    (California Delta Stewardship Council)

  • Emily Landis

    (The Nature Conservancy)

  • Thomas A. Worthington

    (University of Cambridge)

Abstract

Tidal marshes are threatened coastal ecosystems known for their capacity to store large amounts of carbon in their water-logged soils. Accurate quantification and mapping of global tidal marshes soil organic carbon (SOC) stocks is of considerable value to conservation efforts. Here, we used training data from 3710 unique locations, landscape-level environmental drivers and a global tidal marsh extent map to produce a global, spatially explicit map of SOC storage in tidal marshes at 30 m resolution. Here we show the total global SOC stock to 1 m to be 1.44 Pg C, with a third of this value stored in the United States of America. On average, SOC in tidal marshes’ 0–30 and 30–100 cm soil layers are estimated at 83.1 Mg C ha−1 (average predicted error 44.8 Mg C ha−1) and 185.3 Mg C ha−1 (average predicted error 105.7 Mg C ha−1), respectively.

Suggested Citation

  • Tania L. Maxwell & Mark D. Spalding & Daniel A. Friess & Nicholas J. Murray & Kerrylee Rogers & Andre S. Rovai & Lindsey S. Smart & Lukas Weilguny & Maria Fernanda Adame & Janine B. Adams & William E., 2024. "Soil carbon in the world’s tidal marshes," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54572-9
    DOI: 10.1038/s41467-024-54572-9
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