Characterization of the benthic biogeochemical dynamics after flood events in the Rhône River prodelta: a data–model approach
Abstract SO 4 2 -) and methane (CH 4 cm sediment layer during the main winter flood event. Significant changes in the distribution of DIC, SO 4 2 - and CH 4 mmol m - 2 d - 1 after the deposition of the new sediment layer with a longer-term increase by 4 %, therefore implying an initial internal storage of DIC in the newly deposited layer and a slow release over relaxation of the system. Furthermore, examination of the stoichiometric ratios of DIC and SO 4 2 - as well as model output over this 5-month window shows a decoupling between the two modes of sulfate reduction following the deposition – organoclastic sulfate reduction (OSR) intensified in the newly deposited layer below the sediment surface, whereas anaerobic oxidation of methane (AOM) intensified at depth below the former buried surface. The bifurcation depth of sulfate reduction pathways, i.e., the sulfate–methane transition zone (SMTZ), is shifted deeper by 25 cm in the sediment column following the flood deposition. Our findings highlight the significance of short-term transient biogeochemical processes at the seafloor and provide new insights into the benthic carbon cycle in the coastal ocean.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Characterization of the benthic biogeochemical dynamics after flood events in the Rhône River prodelta: a data–model approach ; volume:21 ; number:3 ; year:2024 ; pages:711-729 ; extent:19
Biogeosciences ; 21, Heft 3 (2024), 711-729 (gesamt 19)
- Creator
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Ferreira, Eva
Nmor, Stanley
Viollier, Eric
Lansard, Bruno
Bombled, Bruno
Regnier, Edouard
Monvoisin, Gaël
Grenz, Christian
van Beek, Pieter
Rabouille, Christophe
- DOI
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10.5194/bg-21-711-2024
- URN
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urn:nbn:de:101:1-2024021503355751467449
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:22 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Ferreira, Eva
- Nmor, Stanley
- Viollier, Eric
- Lansard, Bruno
- Bombled, Bruno
- Regnier, Edouard
- Monvoisin, Gaël
- Grenz, Christian
- van Beek, Pieter
- Rabouille, Christophe
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Integrated benthic exchange dynamics and biogeochemical processes under varying environmental conditions
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Modeling biogeochemical processes in sediments from the Rhône River prodelta area (NW Mediterranean Sea)
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