Data/hora: 09/06/2024 07:32:55

Provedor de dados: | 5
País: | France
Título: | Evidence for Microbial Carbon and Sulfur Cycling in Deeply Buried Ridge Flank Basalt
Autores: | Lever, Mark A.; Rouxel, Olivier; Alt, Jeffrey C.; Shimizu, Nobumichi; Ono, Shuhei; Coggon, Rosalind M.; Shanks, Wayne C., Iii; Lapham, Laura; Elvert, Marcus; Prieto-mollar, Xavier; Hinrichs, Kai-uwe; Inagaki, Fumio; Teske, Andreas.
Data: | 2013-03
Ano: | 2013
Resumo: | 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 Juan de 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 delta C-13- and delta S-34-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 delta C-13 signatures locally attenuated by heterotrophic metabolism.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00176/28767/32146.pdf

DOI:10.1126/science.1229240

http://archimer.ifremer.fr/doc/00176/28767/

Editor: | Amer Assoc Advancement Science
Formato: | application/pdf
Fonte: | Science (0036-8075) (Amer Assoc Advancement Science), 2013-03 , Vol. 339 , N. 6125 , P. 1305-1308

Fonte:

2013, American Association for the Advancement of Science

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