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Elucidation of nitrogen fixing property and overgrowth mechanism of toxic cyanobacteria in view of environmental behavior of molybdenum

Research Project

Project/Area Number 17H04588
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Civil and environmental engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

Fujii Manabu  東京工業大学, 環境・社会理工学院, 特任准教授 (30598503)

Co-Investigator(Kenkyū-buntansha) 長濱 祐美 (名尾祐美 / 名尾 祐美 / 長濱祐美)  茨城県霞ケ浦環境科学センター(湖沼環境研究室、大気・化学物質研究室), 湖沼環境研究室, 技師 (00618506)
菊地 哲郎  茨城県霞ケ浦環境科学センター(湖沼環境研究室、大気・化学物質研究室), 湖沼環境研究室, 技師 (50453965)
伊藤 紘晃  熊本大学, くまもと水循環・減災研究教育センター, 助教 (80637182)
吉村 千洋  東京工業大学, 環境・社会理工学院, 准教授 (10402091)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywordsシアノバクテリア / 毒性藍藻類 / 藍藻毒 / 金属 / 水質 / 湖沼 / 毒素生産性藍藻類 / 微量金属 / 主要金属 / 藍藻類 / 毒素生産 / 窒素固定 / 微量栄養素 / 増殖特性 / モリブデン / 大量増殖 / 細胞酸化ストレス / 微生物多様性
Outline of Final Research Achievements

The purpose of this study was to identify the environmental water quality factors that can affect the occurrence of toxic cyanobacteria through the laboratory-based algal culturing experiment in addition to the field survey in semiclosed freshwater lakes (in Japan and Australia). Consequently, this study identified that concentrations of major metals (e.g., calcium etc) and trace metals (e.g., iron, copper, etc.) are tightly related to the occurrence of cyanobacterial toxin (cyanotoxin). Therefore, the management of water qualities focusing on not only traditionally important major nutrients (i.e., nitrogen and phosphorous) but also other water qualities (in particular metals) will be recommended in view of the management of cyanotoxin occurrence in the lakes.

Academic Significance and Societal Importance of the Research Achievements

ダム湖などの閉鎖性水域では、夏季になると藻類の大量増殖(いわゆるアオコ)が発生することがある。アオコが発生すると、水質悪化を生じ、水利用(上水や工業用水、農業用水など)に影響を及ぼす。本研究では、アオコが生産する毒素(藍藻毒)に着目し、国内外における野外湖沼調査や室内試験から、金属類などの水質が毒素の生産に関連していることが明らかとなった。この結果は、藍藻毒の発生を抑制するためには、従来の環境水質基準(窒素やリンなど)に基づく水質管理では不十分であり、微量に存在する金属類(重金属類なども含む)などにも着目していく必要があることを示している。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (14 results)

All 2019 2018 2017

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (8 results) (of which Invited: 1 results)

  • [Journal Article] EFFECT OF DISSOLVED METAL ION CONCENTRATION ON TOXIN PRODUCTION OF FRESHWATER CYANOBACTERIA2019

    • Author(s)
      NAKATANI Kota、NASUKAWA Kohei、MATSUMAE Hiroki、WEI Wang、KIKUCHI Tetsuro、FUJII Manabu
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

      Volume: 75 Issue: 7 Pages: III_385-III_393

    • DOI

      10.2208/jscejer.75.7_III_385

    • NAID

      130007814623

    • ISSN
      2185-6648
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physiological responses of the freshwater N2‐fixing cyanobacterium Raphidiopsis raciborskii to Fe and N availabilities2019

    • Author(s)
      Fu Qing‐Long、Yeung Anna C. Y.、Fujii Manabu、Neilan Brett A.、Waite T. David
    • Journal Title

      Environmental Microbiology

      Volume: 21 Issue: 4 Pages: 1211-1223

    • DOI

      10.1111/1462-2920.14545

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Lectin-stimulated cellular iron uptake and toxin generation in the freshwater cyanobacterium Microcystis aeruginosa2019

    • Author(s)
      Takaara Tomoko、Sasaki Shiori、Fujii Manabu、Ito Hiroaki、Masago Yoshifumi、Omura Tatsuo
    • Journal Title

      Harmful Algae

      Volume: 83 Pages: 25-33

    • DOI

      10.1016/j.hal.2019.01.003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Iron uptake by bloom-forming freshwater cyanobacterium Microcystis aeruginosa in natural and effluent waters2019

    • Author(s)
      Fu Qing-Long、Fujii Manabu、Natsuike Masafumi、Waite T. David
    • Journal Title

      Environmental Pollution

      Volume: 247 Pages: 392-400

    • DOI

      10.1016/j.envpol.2019.01.071

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Statistical Assessment of Rainfall Characteristics in Upper Blue Nile Basin over the Period from 1953 to 20142019

    • Author(s)
      Samy Abeer、Ibrahim Mona G.、Mahmod Wael Elham、Fujii Manabu、Eltawil Amr、Daoud Waled
    • Journal Title

      Water

      Volume: 11 Issue: 3 Pages: 468-468

    • DOI

      10.3390/w11030468

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] EFFECT OF IRON STRESS ON OXIDATIVE STRESS AND TOXIN PRODUCTION BY FRESHWATER CYANOBACTERIA2018

    • Author(s)
      NASUKAWA Kohei、MATSUMAE Hiroki、FUJII Manabu
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

      Volume: 74 Issue: 7 Pages: III_153-III_160

    • DOI

      10.2208/jscejer.74.III_153

    • NAID

      130007627383

    • ISSN
      2185-6648
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 淡水性藍藻類の毒素生産に及ぼす溶存態金属濃度の影響2019

    • Author(s)
      中谷鴻太, 那須川康平, 松前大樹, Wang WEI, 菊地哲郎, 藤井学
    • Organizer
      第56回環境工学研究フォーラム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 水性藍藻類の細胞酸化ストレスならびに毒素生成に及ぼす水質因子の影響2019

    • Author(s)
      那須川康平, 藤井学
    • Organizer
      第53回日本水環境学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 鉄制限が淡水性藍藻類の細胞酸化ストレスならびに毒素生成に及ぼす影響2018

    • Author(s)
      那須川康平, 松前大樹, 藤井学
    • Organizer
      環境工学研究フォーラム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 湖沼水質が藍藻毒生成と微生物多様性に及ぼす影響2018

    • Author(s)
      中谷鴻太、藤井学
    • Organizer
      第5回環境水質工学シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Iron Uptake Kinetics of Bloom-Forming Cyanobacteria2018

    • Author(s)
      Fu, Q., L., Fujii, M., Yeung, A. C. Y., and Waite, T. D.
    • Organizer
      6th Australian & New Zealand Cyanobacteria Workshop
    • Related Report
      2018 Annual Research Report
  • [Presentation] Increased toxin production by metal induced oxidative stress for freshwater cyanobacterium Microcystis aeruginosa2018

    • Author(s)
      Fujii, M.
    • Organizer
      6th Australian & New Zealand Cyanobacteria Workshop
    • Related Report
      2018 Annual Research Report
  • [Presentation] Iron Uptake Kinetics of Bloom-Forming Cyanobacteria2018

    • Author(s)
      Fu, Q.L., Fujii, M.
    • Organizer
      Water and Environment Technology Conference 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 森と海のつながりにおける鉄と有機物の動態2017

    • Author(s)
      藤井学
    • Organizer
      日本陸水学会第82回大会
    • Related Report
      2017 Annual Research Report
    • Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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