Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production
Abstract Seagrass meadows are increasingly recognized across the globe as a natural climate solution due to their significant potential in alkalinity‐driven carbon dioxide (CO2) removal, which possibly represents an overlooked component of ocean carbon removal. This study comprehensively investigate...
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| Format: | Article |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL112373 |
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| author | Wen‐Chen Chou Lan‐Feng Fan Mariche B. Natividad Jian‐Jhih Chen Zih‐Wei Tang Huei‐Fen Chen Ping‐Chun Chen En‐Cheng Kong Yung‐Yen Shih Wei‐Jen Huang Chin‐Chang Hung |
| author_facet | Wen‐Chen Chou Lan‐Feng Fan Mariche B. Natividad Jian‐Jhih Chen Zih‐Wei Tang Huei‐Fen Chen Ping‐Chun Chen En‐Cheng Kong Yung‐Yen Shih Wei‐Jen Huang Chin‐Chang Hung |
| author_sort | Wen‐Chen Chou |
| collection | DOAJ |
| description | Abstract Seagrass meadows are increasingly recognized across the globe as a natural climate solution due to their significant potential in alkalinity‐driven carbon dioxide (CO2) removal, which possibly represents an overlooked component of ocean carbon removal. This study comprehensively investigated the carbonate chemistry, sediment carbon content, mineral composition, and benthic alkalinity fluxes in two distinct sites with tropical seagrass meadows: one situated in organic carbon (OC)‐rich reef sediments and the other in OC‐poor terrestrial sediments. Results showed nearly two orders of magnitude higher benthic alkalinity fluxes in the OC‐rich reefs than in OC‐poor sediments (72.8 ± 64.4 vs. 0.53 ± 0.99 mmol m−2 d−1). This can further substantially increase alkalinity levels and reduce the partial pressure of CO2 in the overlying seawater, thereby enhancing the capacity for CO2 uptake. We propose that seagrass meadows on high‐OC reef sediments, the hotspots for alkalinity generation, could amplify the climate change mitigation potential of seagrass restoration initiatives. |
| format | Article |
| id | doaj-art-24b751dc01784c1c88e82bbfd296e07b |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-24b751dc01784c1c88e82bbfd296e07b2025-08-20T02:31:09ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL112373Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity ProductionWen‐Chen Chou0Lan‐Feng Fan1Mariche B. Natividad2Jian‐Jhih Chen3Zih‐Wei Tang4Huei‐Fen Chen5Ping‐Chun Chen6En‐Cheng Kong7Yung‐Yen Shih8Wei‐Jen Huang9Chin‐Chang Hung10Institute of Marine Environment and Ecology National Taiwan Ocean University Keelung TaiwanInstitute of Marine Environment and Ecology National Taiwan Ocean University Keelung TaiwanInstitute of Marine Environment and Ecology National Taiwan Ocean University Keelung TaiwanDepartment of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung TaiwanInstitute of Earth Sciences National Taiwan Ocean University Keelung TaiwanInstitute of Earth Sciences National Taiwan Ocean University Keelung TaiwanInstitute of Marine Environment and Ecology National Taiwan Ocean University Keelung TaiwanInstitute of Marine Environment and Ecology National Taiwan Ocean University Keelung TaiwanDepartment of Oceanography National Sun Yat‐sen University Kaohsiung TaiwanDepartment of Oceanography National Sun Yat‐sen University Kaohsiung TaiwanDepartment of Oceanography National Sun Yat‐sen University Kaohsiung TaiwanAbstract Seagrass meadows are increasingly recognized across the globe as a natural climate solution due to their significant potential in alkalinity‐driven carbon dioxide (CO2) removal, which possibly represents an overlooked component of ocean carbon removal. This study comprehensively investigated the carbonate chemistry, sediment carbon content, mineral composition, and benthic alkalinity fluxes in two distinct sites with tropical seagrass meadows: one situated in organic carbon (OC)‐rich reef sediments and the other in OC‐poor terrestrial sediments. Results showed nearly two orders of magnitude higher benthic alkalinity fluxes in the OC‐rich reefs than in OC‐poor sediments (72.8 ± 64.4 vs. 0.53 ± 0.99 mmol m−2 d−1). This can further substantially increase alkalinity levels and reduce the partial pressure of CO2 in the overlying seawater, thereby enhancing the capacity for CO2 uptake. We propose that seagrass meadows on high‐OC reef sediments, the hotspots for alkalinity generation, could amplify the climate change mitigation potential of seagrass restoration initiatives.https://doi.org/10.1029/2024GL112373seagrassblue carbon ecosystemalkalinityclimate changecarbon dioxide removal |
| spellingShingle | Wen‐Chen Chou Lan‐Feng Fan Mariche B. Natividad Jian‐Jhih Chen Zih‐Wei Tang Huei‐Fen Chen Ping‐Chun Chen En‐Cheng Kong Yung‐Yen Shih Wei‐Jen Huang Chin‐Chang Hung Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production Geophysical Research Letters seagrass blue carbon ecosystem alkalinity climate change carbon dioxide removal |
| title | Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production |
| title_full | Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production |
| title_fullStr | Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production |
| title_full_unstemmed | Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production |
| title_short | Contrasting CO2 Dynamics in Seagrass Meadows Between Organic Carbon (OC)‐Rich Reef and OC‐Poor Terrestrial Sediments: Implications for Enhanced Alkalinity Production |
| title_sort | contrasting co2 dynamics in seagrass meadows between organic carbon oc rich reef and oc poor terrestrial sediments implications for enhanced alkalinity production |
| topic | seagrass blue carbon ecosystem alkalinity climate change carbon dioxide removal |
| url | https://doi.org/10.1029/2024GL112373 |
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