| Budget Amount *help |
¥23,010,000 (Direct Cost: ¥17,700,000、Indirect Cost: ¥5,310,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Outline of Final Research Achievements |
Methane in sedimentary environment is anaerobically oxidized by archaeal methanotrophs, which shows niche segregation depending on physical and chemical condition. As well as deep-sea sediments, calcium carbonate nodule harbors abundant microbes including anaerobic methanotrophic archaea, and contributes significant methane consumption in gas-hydrate bearing sediment. Furthermore, we quantified biological flux and lifetime of methanol in anoxic marine sediments. Our results suggest that microbial reactions play an important role in the sources and sinks of methanol in subseafloor sediments. Overall, this study suggests that marine gas hydrate deposit is affected by biogeochemical diagenesis in the subsurface biosphere.
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