Aquatic foodweb structure from compound specific nitrogen isotope ratios of amino acids : Reconstruction of the past ecosystems

2010 Fiscal Year Final Research Report

• Project/Area Number: 21770031
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Ecology/Environment
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: OGAWA NanakoO. Japan Agency for Marine-Earth Science and Technology, 海洋・極限環境生物圏領域, 技術研究主任 (80359174)
• Project Period (FY): 2009 – 2010
• Keywords: 生態系 / 近過去生態系変動 / アミノ酸 / 窒素安定同位体比 / 食物連鎖 / 栄養段階

Research Abstract

To verify reliability of the method as a tool for studying ecosystems in the past, compound-specific nitrogen isotopic ratios of amino acids (δ^<15>NAA) were measured for various types of samples. We have determined δ^<15>NAA values for chemical-fixed specimens, shell and soft tissue organics of snails and bivalves, and long-stored biological specimens from Lake Biwa and Lake Baikal. These results strongly suggested that the δ^<15>NAA method was an effective and a useful tool for reconstructing the past ecosystems.

Research Products

• [Journal Article] アミノ酸の窒素同位体比を用いた水棲生物の栄養段階の解析 (2010)
  • Author(s): 力石嘉人, 小川奈々子, 高野淑識, 土屋正史, 大河内直彦
  • Journal Title: 地球化学 44 Pages: 233-241
  • Peer Reviewed
• [Journal Article] Determination of aquatic food-web structure based on compound-specific nitrogen isotopic composition of amino acids. (2009)
  • Author(s): Chikaraishi, Y., Ogawa, N.O., Kashi- yama, Y., Takano, Y., Suga, H., Tomitani, A., Miyashita, H., Kitazato, H., Ohkouchi, N.
  • Journal Title: Limnology and Oceanography : Methods. 7 Pages: 740-750
  • Peer Reviewed
• [Journal Article] Isotopic composition of nitrogenous compounds with emphasis on anthropogenic loading in river ecosystems. (2009)
  • Author(s): Nishikawa J., Kohzu A., Boontanon N., Iwata T., Tanaka T., Ogawa, N.O., Ishii R. Wada E.
  • Journal Title: Isotopes in Environmental Health Studies 45 Pages: 27-40
  • Peer Reviewed
• [Journal Article] アミノ酸の天然レベル窒素安定同位体組成を用いた食物解析 (2009)
  • Author(s): 小川奈々子, 力石嘉人, 大河内直彦
  • Journal Title: 臨床化学 38 Pages: 266-271
• [Presentation] アミノ酸の化合物レベル窒素同位体比:バイカル湖沖帯生態系構造の再構築 (2011)
  • Author(s): 小川奈々子
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2011-05-22
• [Presentation] Ecosystem in Lake Baikal : Results from nitrogen isotopic analyses of amino acids. (2010)
  • Author(s): 小川奈々子
  • Organizer: International Symposium on Isotope Ecology 2010 in Kyoto : Relationship between biodiversity and ecosystem function
  • Place of Presentation: COOP Inn Kyoto
  • Year and Date: 2010-11-02
• [Presentation] 琵琶湖産イサザのアミノ酸化合物レベル窒素安定同位体比:新手法による湖沼環境動態解析 (2010)
  • Author(s): 小川奈々子
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2010-05-20
• [Presentation] 微量分析技術を用いた化合物レベル安定同位体比測定とその応用 (2010)
  • Author(s): 小川奈々子
  • Organizer: シンポジウム:安定同位体を用いて生態系と気候変動の関わりを科学する-陸と海と空,過去・現在・未来をつなぐ安定同位体(招待講演)
  • Place of Presentation: 三重大学
  • Year and Date: 2010-03-10
• [Book] Ultra sensitive elemental analyzer/isotope ratio mass spectrometer for stable nitrogen and carbon isotopic analyses. in Earth, Life, and Isotopes (Eds. N.Ohkouchi, I.Tayasu, K.Koba). (2010)
  • Author(s): Ogawa, N.O., Nagata, T, Kitazato, H., Ohkouchi, N.
  • Total Pages: 339-353
  • Publisher: Kyoto University Press
• [Book] Fish scales as a record of atmospheric change. in Earth, Life, and Isotopes (Eds. N.Ohkouchi, I.Tayasu, K.Koba). (2010)
  • Author(s): Ogawa, N.O., Wada, E., Smirnova- Zalumi, N.S., Melnik, N.G., Bondarenko, N.A., Shimaraev, M.N., Smirnov, V.V., Yoshioka, T.
  • Total Pages: 263-269
  • Publisher: Kyoto University Press
• [Remarks] ホームページ等
  • URL: http://www.jamstec.go.jp/biogeos/j/elhrp/biogeochem/
• [Patent(Industrial Property Rights)] 元素分析用前処理装置及び元素分析装置 (2009)
  • Inventor(s): 大河内直彦・小川奈々子
  • Industrial Property Rights Holder: 独立行政法人海洋研究開発機構
  • Industrial Property Number: 特許,特願2009-260095
  • Filing Date: 2009-11-13