Prevention of hydrogen sulfide release from sediment by nitrate accumulating sulfur oxidizing bacteria

2008 Fiscal Year Self-evaluation Report

• Project/Area Number: 18201005
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: 左山 幹雄 National Institute of Advanced Industrial Science and Technology, 環境管理技術研究部門, 主任研究員 (20344145)
• Project Period (FY): 2006 – 2009
• Keywords: 硫化物 / 堆積物 / イオウ酸化細菌 / 硝酸態窒素 / 青潮

Research Abstract

富栄養化が進行し底層水の貧酸素化が進行している東京湾の堆積物表層には、細胞内に硝酸態窒素(NO_3-)を高濃度に蓄積するイオウ酸化細菌(Nitrate Accumulating SulfurOxidizing Bacteria, NA-SOB)が、広範囲にわたり高密度に生息している。本研究では、NA-SOB による堆積物からの溶存硫化物(ΣH_2S)の溶出抑制機構を定量的に解明することを目的として、青潮が頻発している東京湾を対象海域として、現場調査及び培養実験系により以下の研究を行う。
(1) 現場調査
(1) NA-SOBの動態と堆積物からのΣH_2Sの溶出との関係
(2) NA-SOBとFe循環との関係
(2) 培養実験系
(1) ΣH_2Sの溶出に対するNA-SOBの影響の解析
(2) NA-SOBによるΣH_2Sの酸化過程の解析
(3) NA-SOBがFe循環に与える影響の解析
(4) Intracellular-NO_3-の代謝過程の解析
(3) NA-SOBを組み込んだ物質代謝数理モデルの開発

Research Products

• [Journal Article] ADVを用いた底面境界層における流動観測 (2009)
  • Author(s): 井上徹教、中村由行、左山幹雄
  • Journal Title: 水工学論文集 53 Pages: 1405-1410
  • Peer Reviewed
• [Journal Article] Flow Velocity Measurement in the Benthic Boundary Latyer by Acoustic Doppler Velocimeter (2008)
  • Author(s): Inoue, A., Y. Nakamura, M. Sayama
  • Journal Title: Journal of atmospheric and oceanic technology 25-5 Pages: 822-830
  • Peer Reviewed
• [Journal Article] 有明海泥質干潟堆積物における現場脱窒活性 (2007)
  • Author(s): 左山幹雄
  • Journal Title: 海洋と生物 29-6 Pages: 544-561
• [Presentation] Electric currents in marinesediment (2008)
  • Author(s): Nielsen, L. P., N. Risgaard-Petersen, H. Fossing, P.B. Christensen, M. Sayama
  • Organizer: 12th International Society for Microbial Ecology Conference, Cairns
  • Place of Presentation: Australia
  • Year and Date: 2008-08-02
• [Presentation] Interactions between Beggiatoa and Environments Results from field investigation and experiments (2006)
  • Author(s): Sayama, M
  • Organizer: Invitational Seminar Series at the Max Planck Institute for Marine Microbiology
  • Place of Presentation: Bremen
  • Year and Date: 2006-11-16
• [Presentation] SEASONAL STUDY ON BEGGIATOA IN TOKYO BAY (2006)
  • Author(s): Sayama, M
  • Organizer: 2nd Workshop on Big Sulfur Bacteria
  • Place of Presentation: Aarhus, Denmark
  • Year and Date: 2006-11-08
• [Presentation] Alternative biological mechanism by nitrate accumulating Beggiatoa for creating and maintaining sulfide free anoxic zone in eutrophicated coastal marine sediments (2006)
  • Author(s): Sayama, M
  • Organizer: 11th International symposium on microbial ecology
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2006-08-21
• [Presentation] Importance of nitrate accumulating Beggiatoa as biological barrier against sulfide emission from sediment to water in eutrophicated coastal marine environments (2006)
  • Author(s): Sayama, M
  • Organizer: International Symposium on Research and Management of Eutrophication in Coastal Ecosystems
  • Place of Presentation: Nyborg, Denmark
  • Year and Date: 2006-06-20