Lin, Chin Yik and Bradbury, Harold J. and Antler, Gilad and Burdige, David J. and Bennett, Thomas D. and Li, Shichun and V. Turchyn, Alexandra (2022) Sediment mineralogy influences the rate of microbial sulfate reduction in marine sediments. Earth and Planetary Science Letters, 598. ISSN 0012-821X, DOI https://doi.org/10.1016/j.epsl.2022.117841.
Full text not available from this repository.Abstract
Sedimentary microbial communities play a critical role in the global carbon cycle, oxidizing deposited organic carbon and thus influencing the type of carbon buried from Earth's surface. The rate of microbial metabolism within sedimentary microbial communities is often linked to the lability and amount of organic carbon deposited. Here we show that, in pure culture, for sulfate-reducing bacteria (Desulfovibrio bizertensis) the rate of microbial sulfate reduction is a function of the proportion of clay minerals present in the incubation vials. We argue that the presence of clay minerals stimulates the growth of the sulfate -reducing bacteria and the rate at which sulfate is consumed; we conclude that this is not linked to nutrients and carbon on the clay minerals but rather is a function of the high specific surface area of clay minerals. We further use a global compilation of sedimentary pore fluid data to demonstrate that these observations can be seen in marine sediments, that is pore fluid sulfate concentration gradients in marine sediments correlate with the percentage of clay minerals in the sediment. Our findings suggest that sediment mineralogy influences the rate of microbial activity in marine sediments, which has heretofore not been considered. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Education, Malaysia, China Scholarship Council, European Research Council (ERC) [307582] |
| Uncontrolled Keywords: | Sediment mineralogy; Sulfate -reducing bacteria; Metabolism; Carbon cycle |
| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 27 Sep 2023 03:21 |
| Last Modified: | 27 Sep 2023 03:21 |
| URI: | http://eprints.um.edu.my/id/eprint/40815 |
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