Browse by author
Lookup NU author(s): Professor Robert Upstill-GoddardORCiD
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
© 2023, The Author(s).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.
Author(s): Reithmaier GMS, Cabral A, Akhand A, Bogard MJ, Borges AV, Bouillon S, Burdige DJ, Call M, Chen N, Chen X, Cotovicz LC, Eagle MJ, Kristensen E, Kroeger KD, Lu Z, Maher DT, Perez-Llorens JL, Ray R, Taillardat P, Tamborski JJ, Upstill-Goddard RC, Wang F, Wang ZA, Xiao K, Yau YYY, Santos IR
Publication type: Article
Publication status: Published
Journal: Nature Communications
Year: 2023
Volume: 14
Issue: 1
Online publication date: 11/12/2023
Acceptance date: 28/11/2023
ISSN (electronic): 2041-1723
Publisher: Nature Publishing Group
URL: https://doi.org/10.1038/s41467-023-44037-w
DOI: 10.1038/s41467-023-44037-w
PubMed id: 38081846
Altmetrics provided by Altmetric
