Methane dynamics in mire ecosystems of heavy snowfall area
| Project/Area Number |
18H03351
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 63010:Environmental dynamic analysis-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
Fukui Manabu 北海道大学, 低温科学研究所, 教授 (60305414)
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| Co-Investigator(Kenkyū-buntansha) |
小島 久弥 北海道大学, 低温科学研究所, 助教 (70400009)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Keywords | 湿原 / メタン / 温室効果ガス / メタン酸化細菌 / メタノール酸化細菌 / 雪 / 高層湿原 / 微生物 / 有機物分解 / メタン酸化 / 雪氷 / 微生物群集 / ゲノム / 代謝ネットワーク |
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| Outline of Final Research Achievements |
Methane emissions from mires and wetlands are a major natural source in the global budget of atmospheric methane. A large fraction of these emissions result from diffusive methane emission from the surface of sediments and/or snow. Methane is typically produced by methanogens in anoxic peat sediments and oxidized in the oxic surface, but still unknown in the snow on the peat sediments. Reddish-brown colored snow so called “Akashibo”, containing spherical brown particles has been observed in Ozegahara mire at the time of melting snow. This study clarified that the microbial consortia consisted of methanotrophs, methylotrophs and iron-metabolizing bacteria. Such microbial consortia in snow may contribute to the consumption of methane to reduce the emission into the atmosphere at the time of melting snow.
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| Academic Significance and Societal Importance of the Research Achievements |
メタンは強力な温室効果ガスの一つであり、自然環境における動態を解明することは気候変動を予測する上で重要である。発生源対策が困難な湿原生態系において、融雪期に微生物によるメタンの消費を明らかにしたことで、大気中へのメタンフラックスを見積もる上でも学術的意義がある。さらに、メタンを消費する微生物コンソーシアの発見は、自然環境のみならず様々な環境からのメタン発生対策に資することが可能であり、社会的意義がある。
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Report
(5 results)
Research Products
(5 results)
