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Aerobic methane production in oxygenated water column of lake ecosystems

Research Project

Project/Area Number 23681003
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Environmental dynamic analysis
Research InstitutionUniversity of Yamanashi

Principal Investigator

IWATA Tomoya  山梨大学, 医学工学総合研究部, 准教授 (50362075)

Project Period (FY) 2011-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywordsメタン極大 / 好気的メタン生成 / 有機リン代謝 / メチルホスホン酸 / シアノバクテリア / Synechococcus / 好気的メタン極大 / C-Pリアーゼ / CARD-FISH / メタン / 湖沼 / 温室効果気体 / プランクトン / メタン菌 / 湖盆形状
Research Abstract

We conducted the field and laboratory studies to identify the aerobic methane production pathways in lake ecosystems. The field studies revealed that dissolved CH4 concentrations often exhibit a subsurface maximum during the stratified period in many lakes. In particular, large, oligotrophic lakes tended to form large CH4 maximum. Moreover, seasonal occurrence of the CH4 maximum was closely related to the abundance of planktonic microbes (Synechococcus), suggesting CH4 production by microbes even in the presence of O2. Furthermore, the microcosm experiments showed the aerobic CH4 production when methylphosphonic acid (MPn) was added to the P-deficient lake water, suggesting the expression of a carbon-phosphorus lyase for P utilization and producing CH4 from MPn. The present study revealed the causal relationships between aerobic microorganisms, their phosphonate metabolism, and CH4 production, which clarify the novel methane production pathway observed in many oligotrophic lakes.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • Research Products

    (12 results)

All 2014 2013 2012 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (7 results) Remarks (3 results)

  • [Journal Article] Distribution of putative denitrifying methane oxidizing bacteria in sediment of a freshwater lake, Lake Biwa2012

    • Author(s)
      Kojima H, Tsutsumi M, Ishikawa K, Iwata T, Mussmann M, Fukui M
    • Journal Title

      Systematic and Applied Microbiology

      Volume: Vol.35 Pages: 233-238

    • NAID

      120004608966

    • URL

      http://www.sciencedirect.com/science/article/pii/S0723202012000471

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] 積雪期における湿地からのメタン放出過程2012

    • Author(s)
      岩田智也
    • Journal Title

      低温科学

      Volume: Vol.70 Pages: 137-144

    • URL

      http://eprints.lib.hokudai.ac.jp/journals/index.php?jname=173&vname=5023

    • Related Report
      2013 Final Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成プロセス2014

    • Author(s)
      岩田智也、小林あい、内藤あずさ、小島久弥
    • Organizer
      JOGU Meeting 2014
    • Place of Presentation
      横浜
    • Year and Date
      2014-04-28
    • Related Report
      2013 Final Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成プロセス2014

    • Author(s)
      岩田智也・小林あい・内藤あずさ・小島久弥
    • Organizer
      日本地球惑星科学連合2014年大会
    • Place of Presentation
      パシフィコ横浜(横浜)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成プロセス2013

    • Author(s)
      岩田智也、河合巧幾、中川裕介
    • Organizer
      第78回日本陸水学会大会
    • Place of Presentation
      大津
    • Year and Date
      2013-09-13
    • Related Report
      2013 Final Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成プロセス2013

    • Author(s)
      岩田智也・河合巧幾・中川裕介
    • Organizer
      日本陸水学会第78回大会
    • Place of Presentation
      龍谷大学瀬田キャンパス(大津)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成メカニズム2013

    • Author(s)
      岩田智也
    • Organizer
      日本陸水学会
    • Place of Presentation
      龍谷大学(滋賀県)
    • Related Report
      2012 Annual Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成パターン2012

    • Author(s)
      岩田智也、青木卓也、望月星斗
    • Organizer
      第77回日本陸水学会大会
    • Place of Presentation
      名古屋
    • Year and Date
      2012-09-17
    • Related Report
      2013 Final Research Report
  • [Presentation] 湖沼の好気環境に出現するメタン極大の形成パターン2012

    • Author(s)
      岩田智也
    • Organizer
      日本陸水学会
    • Place of Presentation
      名古屋大学(愛知県)
    • Related Report
      2012 Annual Research Report
  • [Remarks] 研究室ホームページ

    • URL

      http://www.js.yamanashi.ac.jp/~iwata/

    • Related Report
      2013 Final Research Report
  • [Remarks] 研究室ホームページ

    • URL

      http://www.js.yamanashi.ac.jp/~iwata/

    • Related Report
      2013 Annual Research Report
  • [Remarks] 山梨大学研究者総覧

    • URL

      http://erdb.yamanashi.ac.jp/rdb/A_DispInfo.Scholar?ID=BAFC2E19F8119E8D

    • Related Report
      2013 Annual Research Report

URL: 

Published: 2011-04-06   Modified: 2019-07-29  

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