Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex

Akira Ijiri, Fumio Inagaki, Yusuke Kubo, Rishi R. Adhikari, Shohei Hattori, Tatsuhiko Hoshino, Hiroyuki Imachi, Shinsuke Kawagucci, Yuki Morono, Yoko Ohtomo, Shuhei Ono, Sanae Sakai, Ken Takai, Tomohiro Toki, David T. Wang, Marcos Y. Yoshinaga, Gail L. Arnold, Juichiro Ashi, David H. Case, Tomas FesekerKai Uwe Hinrichs, Yojiro Ikegawa, Minoru Ikehara, Jens Kallmeyer, Hidenori Kumagai, Mark A. Lever, Sumito Morita, Ko ichi Nakamura, Yuki Nakamura, Manabu Nishizawa, Victoria J. Orphan, Hans Røy, Frauke Schmidt, Atsushi Tani, Wataru Tanikawa, Takeshi Terada, Hitoshi Tomaru, Takeshi Tsuji, Urumu Tsunogai, Yasuhiko T. Yamaguchi, Naohiro Yoshida

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Microbial life inhabiting subseafloor sediments plays an important role in Earth’s carbon cycle. However, the impact of geodynamic processes on the distributions and carbon-cycling activities of subseafloor life remains poorly constrained. We explore a submarine mud volcano of the Nankai accretionary complex by drilling down to 200 m below the summit. Stable isotopic compositions of water and carbon compounds, including clumped methane isotopologues, suggest that ~90% of methane is microbially produced at 16° to 30°C and 300 to 900 m below seafloor, corresponding to the basin bottom, where fluids in the accretionary prism are supplied via megasplay faults. Radiotracer experiments showed that relatively small microbial populations in deep mud volcano sediments (102 to 103 cells cm−3) include highly active hydrogenotrophic methanogens and acetogens. Our findings indicate that subduction-associated fluid migration has stimulated microbial activity in the mud reservoir and that mud volcanoes may contribute more substantially to the methane budget than previously estimated.

Original languageEnglish
Article numbereaao4631
JournalScience Advances
Volume4
Issue number6
DOIs
Publication statusPublished - Jun 13 2018

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mud volcano
biosphere
methane
submarine volcano
fluid
carbon
accretionary prism
carbon cycle
sediment
geodynamics
microbial activity
mud
isotopic composition
subduction
seafloor
drilling
basin
experiment
water

All Science Journal Classification (ASJC) codes

  • General

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Ijiri, A., Inagaki, F., Kubo, Y., Adhikari, R. R., Hattori, S., Hoshino, T., ... Yoshida, N. (2018). Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex. Science Advances, 4(6), [eaao4631]. https://doi.org/10.1126/sciadv.aao4631

Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex. / Ijiri, Akira; Inagaki, Fumio; Kubo, Yusuke; Adhikari, Rishi R.; Hattori, Shohei; Hoshino, Tatsuhiko; Imachi, Hiroyuki; Kawagucci, Shinsuke; Morono, Yuki; Ohtomo, Yoko; Ono, Shuhei; Sakai, Sanae; Takai, Ken; Toki, Tomohiro; Wang, David T.; Yoshinaga, Marcos Y.; Arnold, Gail L.; Ashi, Juichiro; Case, David H.; Feseker, Tomas; Hinrichs, Kai Uwe; Ikegawa, Yojiro; Ikehara, Minoru; Kallmeyer, Jens; Kumagai, Hidenori; Lever, Mark A.; Morita, Sumito; Nakamura, Ko ichi; Nakamura, Yuki; Nishizawa, Manabu; Orphan, Victoria J.; Røy, Hans; Schmidt, Frauke; Tani, Atsushi; Tanikawa, Wataru; Terada, Takeshi; Tomaru, Hitoshi; Tsuji, Takeshi; Tsunogai, Urumu; Yamaguchi, Yasuhiko T.; Yoshida, Naohiro.

In: Science Advances, Vol. 4, No. 6, eaao4631, 13.06.2018.

Research output: Contribution to journalArticle

Ijiri, A, Inagaki, F, Kubo, Y, Adhikari, RR, Hattori, S, Hoshino, T, Imachi, H, Kawagucci, S, Morono, Y, Ohtomo, Y, Ono, S, Sakai, S, Takai, K, Toki, T, Wang, DT, Yoshinaga, MY, Arnold, GL, Ashi, J, Case, DH, Feseker, T, Hinrichs, KU, Ikegawa, Y, Ikehara, M, Kallmeyer, J, Kumagai, H, Lever, MA, Morita, S, Nakamura, KI, Nakamura, Y, Nishizawa, M, Orphan, VJ, Røy, H, Schmidt, F, Tani, A, Tanikawa, W, Terada, T, Tomaru, H, Tsuji, T, Tsunogai, U, Yamaguchi, YT & Yoshida, N 2018, 'Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex', Science Advances, vol. 4, no. 6, eaao4631. https://doi.org/10.1126/sciadv.aao4631
Ijiri A, Inagaki F, Kubo Y, Adhikari RR, Hattori S, Hoshino T et al. Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex. Science Advances. 2018 Jun 13;4(6). eaao4631. https://doi.org/10.1126/sciadv.aao4631
Ijiri, Akira ; Inagaki, Fumio ; Kubo, Yusuke ; Adhikari, Rishi R. ; Hattori, Shohei ; Hoshino, Tatsuhiko ; Imachi, Hiroyuki ; Kawagucci, Shinsuke ; Morono, Yuki ; Ohtomo, Yoko ; Ono, Shuhei ; Sakai, Sanae ; Takai, Ken ; Toki, Tomohiro ; Wang, David T. ; Yoshinaga, Marcos Y. ; Arnold, Gail L. ; Ashi, Juichiro ; Case, David H. ; Feseker, Tomas ; Hinrichs, Kai Uwe ; Ikegawa, Yojiro ; Ikehara, Minoru ; Kallmeyer, Jens ; Kumagai, Hidenori ; Lever, Mark A. ; Morita, Sumito ; Nakamura, Ko ichi ; Nakamura, Yuki ; Nishizawa, Manabu ; Orphan, Victoria J. ; Røy, Hans ; Schmidt, Frauke ; Tani, Atsushi ; Tanikawa, Wataru ; Terada, Takeshi ; Tomaru, Hitoshi ; Tsuji, Takeshi ; Tsunogai, Urumu ; Yamaguchi, Yasuhiko T. ; Yoshida, Naohiro. / Deep-biosphere methane production stimulated by geofluids in the nankai accretionary complex. In: Science Advances. 2018 ; Vol. 4, No. 6.
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abstract = "Microbial life inhabiting subseafloor sediments plays an important role in Earth’s carbon cycle. However, the impact of geodynamic processes on the distributions and carbon-cycling activities of subseafloor life remains poorly constrained. We explore a submarine mud volcano of the Nankai accretionary complex by drilling down to 200 m below the summit. Stable isotopic compositions of water and carbon compounds, including clumped methane isotopologues, suggest that ~90{\%} of methane is microbially produced at 16° to 30°C and 300 to 900 m below seafloor, corresponding to the basin bottom, where fluids in the accretionary prism are supplied via megasplay faults. Radiotracer experiments showed that relatively small microbial populations in deep mud volcano sediments (102 to 103 cells cm−3) include highly active hydrogenotrophic methanogens and acetogens. Our findings indicate that subduction-associated fluid migration has stimulated microbial activity in the mud reservoir and that mud volcanoes may contribute more substantially to the methane budget than previously estimated.",
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AU - Ijiri, Akira

AU - Inagaki, Fumio

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AU - Hattori, Shohei

AU - Hoshino, Tatsuhiko

AU - Imachi, Hiroyuki

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AU - Ono, Shuhei

AU - Sakai, Sanae

AU - Takai, Ken

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AU - Yoshinaga, Marcos Y.

AU - Arnold, Gail L.

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AU - Case, David H.

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AU - Hinrichs, Kai Uwe

AU - Ikegawa, Yojiro

AU - Ikehara, Minoru

AU - Kallmeyer, Jens

AU - Kumagai, Hidenori

AU - Lever, Mark A.

AU - Morita, Sumito

AU - Nakamura, Ko ichi

AU - Nakamura, Yuki

AU - Nishizawa, Manabu

AU - Orphan, Victoria J.

AU - Røy, Hans

AU - Schmidt, Frauke

AU - Tani, Atsushi

AU - Tanikawa, Wataru

AU - Terada, Takeshi

AU - Tomaru, Hitoshi

AU - Tsuji, Takeshi

AU - Tsunogai, Urumu

AU - Yamaguchi, Yasuhiko T.

AU - Yoshida, Naohiro

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