Decomposition process of sediment organic matter by predator-prey relationship between Capitella and bacteria

• Project/Area Number: 21710081
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Environmental technology/Environmental materials
• Research Institution: Ehime University
• Principal Investigator: KUNIHIRO Tadao Ehime University, 沿岸環境科学研究センター・グローバル, COE研究員 (90512690)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: イトゴカイ / 海洋微生物 / 有機汚泥 / キノンプロファイル / 安定同位体 / 生物間相互作用 / PCR-DGGE / 安定同立体 / 有機物代謝 / quinone-SIP

Research Abstract

This study aims at clarifying the interaction and association between Capitella sp. I and bacteria on the decomposition of organic matter in the organically enriched sediment. In the associated system with the Capitella and the bacteria in the organically enriched sediment, the decomposition of the organic matter may proceed rapidly. It is very likely that the Capitella works as a promoter of bacteria in the organically enriched sediment, and feeds the increased bacteria as one of the main foods, while the bacteria decompose the organic matter in the sediment with the assistance of the Capitella.

Research Products

• [Journal Article] Increase in Alphaproteobacteria in association with a polychaete, Capitella sp.I, in the organically enriched sediment. (2011)
  • Author(s): Tadao Kunihiro, Hiroyuki Takasu, Tomoaki Miyazaki, Yuuta Uramoto, Kyoko Kinoshita, Supaporn Yodnarasri, Daigo Hama, Minoru Wada, Kazuhiro Kogure, Kouichi Ohwada, Hiroaki Tsutsumi.
  • Journal Title: The ISME Journal (Nature Publishing Group). (accepted)
  • Peer Reviewed
• [Journal Article] Increase in Alphaproteobacteria in association with a polychaete, Capitella sp.I, in the organically enriched sediment (2011)
  • Author(s): Tadao Kunihiro, Hiroyuki Takasu, Tomoaki Miyazaki, Yuuta Uramoto, Kyoko Kinoshita, Supaporn Yodnarasri, Daigo Hama, Minoru Wada, Kazuhiro Kogure, Kouichi Ohwada, Hiroaki Tsutsumi
  • Journal Title: The ISME Journal Volume: DOI:10.1038/ismej.2011.57(In press)
• [Presentation] 魚類養殖場由来の有機物が与える海底の微生物群集への影響 (2010)
  • Author(s): 國弘忠生、大森浩二、伊藤克敏、堤裕昭
  • Organizer: 日本生態学会第57回全国大会
  • Place of Presentation: 東京大学(東京都)
  • Year and Date: 2010-03-16
• [Presentation] Bioremediation experiment in fish farm sediments with artificially cultured colonies of a deposit-feeding polychaete, Capitella sp. (2010)
  • Author(s): Tadao Kunihiro, Hiroaki Tsutsumi, Koji Omori
  • Organizer: International Symposium on Modeling and Analysis of Marine Environmental Problems (MAMEP 2010).P.74
  • Place of Presentation: Matsuyama, Japan
• [Presentation] 魚類養殖場由来の有機物が与える海底の微生物群集への影響 (2010)
  • Author(s): 國弘忠生、大森浩二、伊藤克敏、堤裕昭
  • Organizer: 日本生態学会第57回全国大会.P.322
  • Place of Presentation: 東京
• [Presentation] 魚類養殖場周辺海域の堆積有機物と微生物群集の関係 (2009)
  • Author(s): 國弘忠生、堤裕昭、伊藤克敏、大森浩二
  • Organizer: 第25回日本微生物生態学会
  • Place of Presentation: 広島大学(広島県)
  • Year and Date: 2009-11-21
• [Presentation] 魚類養殖場周辺海域の堆積有機物と微生物群集の関係 (2009)
  • Author(s): 國弘忠生、堤裕昭、伊藤克敏、大森浩二
  • Organizer: 第25回日本微生物生態学会.p.54
  • Place of Presentation: 東広島