IODP Expedition 337, Shimokita Deep Coalbed Biosphere, supplement to: Inagaki, F; Hinrichs, Kai-Uwe; Kubo, Y; Bowles, Marshall W; Heuer, Verena B; Hong, W-L; Hoshino, Tatsuhiko; Ijiri, Akira; Imachi, H; Ito, M; Kaneko, Masanori; Lever, Mark A; Lin, Yu-Shih; Methe, B A; Morita, S; Morono, Yuki; Tanikawa, W; Bihan, M; Bowden, S A; Elvert, Marcus; Glombitza, C; Gross, D; Harrington, G J; Hori, T; Li, K; Limmer, D; Liu, Chiung-Hui; Murayama, M; Ohkouchi, Naohiko; Ono, Shuhei; Park, Young-Soo; Phillips, S C; Prieto-Mollar, Xavier; Purkey, M; Riedinger, Natascha; Sanada, Yoshinori; Sauvage, J; Snyder, Glen T; Susilawati, R; Takano, Yoshinori; Tasumi, E; Terada, Takeshi; Tomaru, Hitoshi; Trembath-Reichert, E; Wang, D T; Yamada, Y (2015): Exploring deep microbial life in coal-bearing sediment down to ~2.5 km below the ocean floor. Science, 439 (6246), 420-424

F Inagaki, Kai-Uwe Hinrichs, Y Kubo, Marshall W Bowles, Verena B Heuer, W-L Hong, Tatsuhiko Hoshino, Akira Ijiri, H Imachi, M Ito, Masanori Kaneko, Mark A Lever, Yu-Shih Lin, B A Methe, S Morita, Yuki Morono, W Tanikawa, M Bihan, S A Bowden, Marcus Elvert, C Glombitza, D Gross, G J Harrington, T Hori, K Li … & Y Yamada
Microbial life inhabits deeply buried marine sediments, but the extent of this vast ecosystem remains poorly constrained. Here we provide evidence for the existence of microbial communities in ~40° to 60°C sediment associated with lignite coal beds at ~1.5 to 2.5 km below the seafloor in the Pacific Ocean off Japan. Microbial methanogenesis was indicated by the isotopic compositions of methane and carbon dioxide, biomarkers, cultivation data, and gas compositions. Concentrations of indigenous microbial cells...
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