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Evaluation of primary productivity in coastal waters based on biogeochemical behavior of iron

Research Project

Project/Area Number 16H04435
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
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) 吉村 千洋  東京工業大学, 環境・社会理工学院, 准教授 (10402091)
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)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2016: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords鉄 / 生物地球化学 / 沿岸域 / 植物プランクトン / 酸化還元 / 凝集沈降 / フラックス / 土地利用 / 流域土地利用 / 鉄摂取 / 沿岸域藻類 / 生物生産 / 微量金属 / 陸域 / 森と海のつながり / 一次生産 / 生物生産性 / 反応速度論モデル / 一次生産性 / 地球化学的動態
Outline of Final Research Achievements

Iron is an essential micronutrient for organisms, as this trace element plays a role in the photosynthesis and nitrogen fixation of primary producers including phytoplankton. In the open ocean, there is a region where growth of phytoplankton is limited due to lack of iron, and in the past decades studies on iron chemical speciation and bioavailability have been advanced particularly in the research area of oceanography. However, knowledge on the iron dynamics in rivers, estuaries and coastal areas are less accumulated, and the effects of human activities on water transport to the coastal areas and biological basic production are in many cases unknown. Therefore, this study has investigated the impact of land use in the river basin to the coastal primary productivity by examining the biogeochemical dynamics (e.g., redox kinetics, coagulation behavior, algal iron uptake) in rivers and coastal area.

Academic Significance and Societal Importance of the Research Achievements

持続可能な開発目標でも示されるように、沿岸海洋域を持続可能な形で利用し海洋生態系・資源を将来にわたり保全していくことは重要である。本研究では、これまで知見が不足していた河川・沿岸域における鉄の生物地球化学的動態を明らかにすることで、陸域人間活動が沿岸域での鉄動態や生物利用に及ぼす影響を定量的に示した。例えば、沿岸域への鉄輸送は森林や都市部などの土地利用や湾内での海水交換に影響を受ける一方、湾内で生産される有機物も生物利用性に貢献していることが分かった。今後は、本研究で得られた鉄の生物地球化学的動態に関する推定精度をさらに向上させることで、鉄の動態を考慮した流域保全に活用していくことが望まれる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (17 results)

All 2019 2018 2017 Other

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Acknowledgement Compliant: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Book (1 results) Remarks (1 results)

  • [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] 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] 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] 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
  • [Journal Article] TRACE METAL SPECIATION IN URBAN AND NATURAL RIVERS AND EFFLUENT WATERS: A CASE STUDY IN THE SAGAMI RIVER BASIN2017

    • Author(s)
      和田光央, 藤井学
    • Journal Title

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

      Volume: 73 Issue: 7 Pages: III_17-III_27

    • DOI

      10.2208/jscejer.73.III_17

    • NAID

      130006602946

    • ISSN
      2185-6648
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photochemical generation and decay kinetics of superoxide and hydrogen peroxide in the presence of standard humic and fulvic acids2017

    • Author(s)
      Fujii Manabu、Otani Erika
    • Journal Title

      Water Research

      Volume: 123 Pages: 642-654

    • DOI

      10.1016/j.watres.2017.07.015

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Importance of Allochthonous and Autochthonous Dissolved Organic Matter in Fe(II) Oxidation: A Case Study in Shizugawa Bay Watershed, Japan2017

    • Author(s)
      Lee,Y. P., Fujii, M., Kikuchi, T., Natsuike, M., Ito, H., Watanabe, T., Yoshimura, C.
    • Journal Title

      Chemosphere

      Volume: 180 Pages: 221-228

    • DOI

      10.1016/j.chemosphere.2017.04.008

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [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] 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
    • Int'l Joint Research
  • [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
    • Int'l Joint Research
  • [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] Humic Substance Molecules Bound to Iron as Determined by Ultrahigh Resolution Mass Spectrometry2018

    • Author(s)
      Fujii, M., Shiroya, M., Fu, Q., L.,
    • Organizer
      Goldschmidt Annual Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [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
  • [Presentation] Effect of Source and Composition of Dissolved Organic Matter on Fe(II) Oxidation in Freshwater and Coastal Seawater2017

    • Author(s)
      Fujii., M
    • Organizer
      Goldschmidt2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 自然河川ならびに下水処理水中における微量金属スペーシエーション:相模川流域での事例研究2017

    • Author(s)
      和田光央, 藤井学
    • Organizer
      第54回環境工学研究フォーラム
    • Related Report
      2017 Annual Research Report
  • [Book] 第2章開放性内湾の持続可能な利用と海洋環境の実現を目指して 2.3 森は海の恋人か(「里海管理論-きれいで豊かで賑わいのある持続的な海」 柳哲雄編)2019

    • Author(s)
      藤井学、夏池真史、伊藤紘晃、吉村千洋
    • Total Pages
      368
    • Publisher
      農林統計協会
    • ISBN
      9784541042811
    • Related Report
      2018 Annual Research Report
  • [Remarks] Homepage

    • URL

      https://sites.google.com/site/manabufujiiattit/home

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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