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Soil carbon in the world's tidal marshes.

Published version
Peer-reviewed

Repository URI

https://www.repository.cam.ac.uk/handle/1810/376794

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Type

Article

Change log

Authors

Maxwell, Tania L  ORCID logo  https://orcid.org/0000-0002-8413-9186
Spalding, Mark D  ORCID logo  https://orcid.org/0000-0001-9456-4533
Murray, Nicholas J  ORCID logo  https://orcid.org/0000-0002-4008-3053
Rogers, Kerrylee  ORCID logo  https://orcid.org/0000-0003-1350-4737

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.

Description

Acknowledgements: We thank Daniele Baisero, Thomas Ball, and Alison Eyres for methodological help. This project benefited from funding from the Bezos Earth Fund and other donors supporting the Nature Conservancy (T.A.W., E.L., and M.D.S.). LH Pérez-Bernal provided assistance in the geochemical analysis of sediment cores from Mexico. This work was performed using resources provided by the Cambridge Service for Data-Driven Discovery (CSD3) operated by the University of Cambridge Research Computing Service (www.csd3.cam.ac.uk), provided by Dell EMC and Intel using Tier-2 funding from the Engineering and Physical Sciences Research Council (capital grant EP/T022159/1), and DiRAC funding from the Science and Technology Facilities Council (www.dirac.ac.uk). Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.


Funder: Bezos Earth Fund

Keywords

41 Environmental Sciences, 4106 Soil Sciences, 15 Life on Land

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

15

Publisher

Springer Science and Business Media LLC

Publisher DOI

https://doi.org/10.1038/s41467-024-54572-9

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Except where otherwised noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/
Sponsorship
EPSRC (EP/T022159/1)

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