Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes

Gloria M. S. Reithmaier (), Alex Cabral, Anirban Akhand, Matthew J. Bogard, Alberto V. Borges, Steven Bouillon, David J. Burdige, Mitchel Call, Nengwang Chen, Xiaogang Chen, Luiz C. Cotovicz, Meagan J. Eagle, Erik Kristensen, Kevin D. Kroeger, Zeyang Lu, Damien T. Maher, J. Lucas Pérez-Lloréns, Raghab Ray, Pierre Taillardat, Joseph J. Tamborski, Rob C. Upstill-Goddard, Faming Wang, Zhaohui Aleck Wang, Kai Xiao, Yvonne Y. Y. Yau and Isaac R. Santos
Additional contact information
Gloria M. S. Reithmaier: University of Gothenburg
Alex Cabral: University of Gothenburg
Anirban Akhand: Hong Kong University of Science and Technology
Matthew J. Bogard: University of Lethbridge
Alberto V. Borges: University of Liège
Steven Bouillon: KU Leuven
David J. Burdige: Old Dominion University
Mitchel Call: Southern Cross University
Nengwang Chen: Xiamen University
Xiaogang Chen: Westlake University
Luiz C. Cotovicz: Leibniz Institute for Baltic Sea Research
Meagan J. Eagle: U.S. Geological Survey
Erik Kristensen: University of Southern Denmark
Kevin D. Kroeger: U.S. Geological Survey
Zeyang Lu: Xiamen University
Damien T. Maher: Southern Cross University
J. Lucas Pérez-Lloréns: University of Cádiz
Raghab Ray: The University of Tokyo
Pierre Taillardat: National University of Singapore
Joseph J. Tamborski: Old Dominion University
Rob C. Upstill-Goddard: Newcastle University
Faming Wang: Chinese Academy of Sciences
Zhaohui Aleck Wang: Woods Hole Oceanographic Institution
Kai Xiao: Southern University of Science and Technology
Yvonne Y. Y. Yau: University of Gothenburg
Isaac R. Santos: University of Gothenburg

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Mangroves and saltmarshes are biogeochemical hotspots storing carbon in sediments and in the ocean following lateral carbon export (outwelling). Coastal seawater pH is modified by both uptake of anthropogenic carbon dioxide and natural biogeochemical processes, e.g., wetland inputs. Here, we investigate how mangroves and saltmarshes influence coastal carbonate chemistry and quantify the contribution of alkalinity and dissolved inorganic carbon (DIC) outwelling to blue carbon budgets. Observations from 45 mangroves and 16 saltmarshes worldwide revealed that >70% of intertidal wetlands export more DIC than alkalinity, potentially decreasing the pH of coastal waters. Porewater-derived DIC outwelling (81 ± 47 mmol m−2 d−1 in mangroves and 57 ± 104 mmol m−2 d−1 in saltmarshes) was the major term in blue carbon budgets. However, substantial amounts of fixed carbon remain unaccounted for. Concurrently, alkalinity outwelling was similar or higher than sediment carbon burial and is therefore a significant but often overlooked carbon sequestration mechanism.

Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-023-44037-w Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-44037-w

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-023-44037-w

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().