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Evidence for Microbial Carbon and Sulfur Cycling in Deeply Buried Ridge Flank Basalt

Evidence for Microbial Carbon and Sulfur Cycling in Deeply Buried Ridge Flank Basalt
Evidence for Microbial Carbon and Sulfur Cycling in Deeply Buried Ridge Flank Basalt
Sediment-covered basalt on the flanks of mid-ocean ridges constitutes most of Earth's oceanic crust, but the composition and metabolic function of its microbial ecosystem are largely unknown. By drilling into 3.5-million- year-old subseafloor basalt, we demonstrated the presence of methane- and sulfur-cycling microbes on the eastern flank of the Juande Fuca Ridge. Depth horizons with functional genes indicative of methane-cycling and sulfate-reducing microorganisms are enriched in solid-phase sulfur and total organic carbon, host d13 C- and d34 S-isotopic values with a biological imprint, and show clear signs of microbial activity when incubated in the laboratory. Downcore changes in carbon and sulfur cycling show discrete geochemical intervals with chemoautotrophic d13 C signatures locally attenuated by heterotrophic metabolism.
0036-8075
1305-1308
Lever, M.A.
37d5575b-1faf-4666-8fcf-275985b5c253
Rouxel, O.
4a21083a-8733-4fa3-8561-958830c88fbd
Alt, J.C.
15bc6ffe-26c5-4c34-bb91-f4d076811e28
Shimizu, N.
a1ed8dcb-874f-4dc1-8b78-e81397f77163
Ono, S.
613cb31a-323d-49f0-99fa-1bce5504aa6c
Coggon, R.M.
09488aad-f9e1-47b6-9c62-1da33541b4a4
Shanks, W.C.
5d0ab7ff-1c77-4d98-8ad8-5cc496cae17e
Lapham, L.
264533c7-3103-4def-a2f0-19a48d6eddff
Elvert, M.
7a82a103-df4e-455b-81fa-049ccb36adcd
Prieto-Mollar, X.
e76f1534-dc91-46b8-9763-bef4bfe36cf9
Hinrichs, K.-U.
f8b4b9eb-a683-4282-be1f-eaf68931a069
Inagaki, F.
88bba275-3421-42f3-8022-0643b27c2094
Teske, A.
52733b2f-282f-44c3-a72e-627768ff934d
Lever, M.A.
37d5575b-1faf-4666-8fcf-275985b5c253
Rouxel, O.
4a21083a-8733-4fa3-8561-958830c88fbd
Alt, J.C.
15bc6ffe-26c5-4c34-bb91-f4d076811e28
Shimizu, N.
a1ed8dcb-874f-4dc1-8b78-e81397f77163
Ono, S.
613cb31a-323d-49f0-99fa-1bce5504aa6c
Coggon, R.M.
09488aad-f9e1-47b6-9c62-1da33541b4a4
Shanks, W.C.
5d0ab7ff-1c77-4d98-8ad8-5cc496cae17e
Lapham, L.
264533c7-3103-4def-a2f0-19a48d6eddff
Elvert, M.
7a82a103-df4e-455b-81fa-049ccb36adcd
Prieto-Mollar, X.
e76f1534-dc91-46b8-9763-bef4bfe36cf9
Hinrichs, K.-U.
f8b4b9eb-a683-4282-be1f-eaf68931a069
Inagaki, F.
88bba275-3421-42f3-8022-0643b27c2094
Teske, A.
52733b2f-282f-44c3-a72e-627768ff934d

Lever, M.A., Rouxel, O., Alt, J.C., Shimizu, N., Ono, S., Coggon, R.M., Shanks, W.C., Lapham, L., Elvert, M., Prieto-Mollar, X., Hinrichs, K.-U., Inagaki, F. and Teske, A. (2013) Evidence for Microbial Carbon and Sulfur Cycling in Deeply Buried Ridge Flank Basalt. Science, 339 (6125), 1305-1308. (doi:10.1126/science.1229240).

Record type: Article

Abstract

Sediment-covered basalt on the flanks of mid-ocean ridges constitutes most of Earth's oceanic crust, but the composition and metabolic function of its microbial ecosystem are largely unknown. By drilling into 3.5-million- year-old subseafloor basalt, we demonstrated the presence of methane- and sulfur-cycling microbes on the eastern flank of the Juande Fuca Ridge. Depth horizons with functional genes indicative of methane-cycling and sulfate-reducing microorganisms are enriched in solid-phase sulfur and total organic carbon, host d13 C- and d34 S-isotopic values with a biological imprint, and show clear signs of microbial activity when incubated in the laboratory. Downcore changes in carbon and sulfur cycling show discrete geochemical intervals with chemoautotrophic d13 C signatures locally attenuated by heterotrophic metabolism.

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Published date: 15 March 2013
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 350278
URI: http://eprints.soton.ac.uk/id/eprint/350278
ISSN: 0036-8075
PURE UUID: b51a5e19-aa2f-4825-ad56-14c296a9a5a2
ORCID for R.M. Coggon: ORCID iD orcid.org/0000-0002-9228-9707

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Date deposited: 21 Mar 2013 10:35
Last modified: 27 Apr 2022 01:58

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Contributors

Author: M.A. Lever
Author: O. Rouxel
Author: J.C. Alt
Author: N. Shimizu
Author: S. Ono
Author: R.M. Coggon ORCID iD
Author: W.C. Shanks
Author: L. Lapham
Author: M. Elvert
Author: X. Prieto-Mollar
Author: K.-U. Hinrichs
Author: F. Inagaki
Author: A. Teske

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