Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes
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, w...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-12-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-44037-w |
| _version_ | 1831879822718009344 |
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| author | 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 Isaac R. Santos |
| author_facet | 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 Isaac R. Santos |
| author_sort | Gloria M. S. Reithmaier |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T22:37:41Z |
| format | Article |
| id | doaj.art-b36b708e619143e09bb1ab826543d593 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2025-03-21T21:52:33Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-b36b708e619143e09bb1ab826543d5932024-05-26T11:24:04ZengNature PortfolioNature Communications2041-17232023-12-011411810.1038/s41467-023-44037-wCarbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshesGloria M. S. Reithmaier0Alex Cabral1Anirban Akhand2Matthew J. Bogard3Alberto V. Borges4Steven Bouillon5David J. Burdige6Mitchel Call7Nengwang Chen8Xiaogang Chen9Luiz C. Cotovicz10Meagan J. Eagle11Erik Kristensen12Kevin D. Kroeger13Zeyang Lu14Damien T. Maher15J. Lucas Pérez-Lloréns16Raghab Ray17Pierre Taillardat18Joseph J. Tamborski19Rob C. Upstill-Goddard20Faming Wang21Zhaohui Aleck Wang22Kai Xiao23Yvonne Y. Y. Yau24Isaac R. Santos25Department of Marine Sciences, University of GothenburgDepartment of Marine Sciences, University of GothenburgDepartment of Ocean Science, Hong Kong University of Science and TechnologyDepartment of Biological Sciences, University of LethbridgeChemical Oceanography Unit, University of LiègeDepartment of Earth and Environmental Sciences, KU LeuvenDepartment of Ocean and Earth Sciences, Old Dominion UniversityFaculty of Science and Engineering, Southern Cross UniversityState Key Laboratory of Marine Environment Science, Xiamen UniversitySchool of Engineering, Westlake UniversityDepartment of Marine Chemistry, Leibniz Institute for Baltic Sea ResearchWoods Hole Coastal and Marine Science Center, U.S. Geological SurveyDepartment of Biology, University of Southern DenmarkWoods Hole Coastal and Marine Science Center, U.S. Geological SurveyCollege of the Environment and Ecology, Xiamen UniversityFaculty of Science and Engineering, Southern Cross UniversityInstituto Universitario de Investigación Marina (INMAR), University of CádizAtmosphere and Ocean Research Institute, The University of TokyoNUS Environmental Research Institute, National University of SingaporeDepartment of Ocean and Earth Sciences, Old Dominion UniversitySchool of Natural and Environmental Sciences, Newcastle UniversityXiaoliang Research Station of Tropical Coastal Ecosystems, Chinese Academy of SciencesDepartment of Marine Chemistry and Geochemistry, Woods Hole Oceanographic InstitutionSchool of Environmental Science and Engineering, Southern University of Science and TechnologyDepartment of Marine Sciences, University of GothenburgDepartment of Marine Sciences, University of GothenburgAbstract 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.https://doi.org/10.1038/s41467-023-44037-w |
| spellingShingle | 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 Isaac R. Santos Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes Nature Communications |
| title | Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| title_full | Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| title_fullStr | Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| title_full_unstemmed | Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| title_short | Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| title_sort | carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes |
| url | https://doi.org/10.1038/s41467-023-44037-w |
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