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Understanding the night ecology of poisonous blue-green algae and its application to good-quality water intake system

Research Project

Project/Area Number 24656310
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeSingle-year Grants
Research Field Civil and environmental engineering
Research InstitutionTohoku University

Principal Investigator

MAKINO Ikuyo  東北大学, 環境保全センター, 助教 (00542060)

Co-Investigator(Renkei-kenkyūsha) YAHAGI Yuji  芝浦工業大学, 工学研究科, 教授 (60265973)
Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsアオコ / 夜間計測 / 良水取水 / Microcystis / 良水取水システム / 夜間生態環境
Research Abstract

In the nocturnal observation conducted during August and September, small lumps of bloom stayed at a fixed depth of water between 2 and 4 a.m. without any particular motion. Blooms on the water surface started to disperse starting around 2 p.m. and they are observed only scarcely on the surface by 4 p.m. Such cycle was observed every day until late September. The rhythm of this cycle indicates that behavior of photosynthetic algae cannot be explained only by photo-taxis. We could find that bloom goes down under water during night time and stays at a certain depth during certain period. However, we could not create good-quality water intake system to intake raw water of a good quality. To realize this, the following key issues need to be addressed: 1. Vertical motions spanning a few months through the initial phase to decline phase of bloom forming; 2. Determination of the toxicity of metabolite excreted by bloom forming algae; 3. Cell behavior after the decomposition of bloom.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (10 results)

All 2014 2013

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (8 results)

  • [Journal Article] Relationship between growing number of river water quality and cyanobacteria by blue-green in lake2014

    • Author(s)
      牧野育代,矢作裕司
    • Journal Title

      Journal of Environment and Safety

      Volume: 5 Issue: 1 Pages: 19-25

    • DOI

      10.11162/daikankyo.14G0102

    • NAID

      130004566836

    • ISSN
      1884-4375, 2186-3725
    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Water quality change studies of upstream areas with leisure facility2013

    • Author(s)
      牧野育代,矢作裕司
    • Journal Title

      Journal of Environment and Safety

      Volume: 4 Issue: 3 Pages: 203-211

    • DOI

      10.11162/daikankyo.13G0603

    • NAID

      130003388133

    • ISSN
      1884-4375, 2186-3725
    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Presentation] 受熱期の貯水池流入部における成層形成が光合成藻類の増殖に及ぼす影響2014

    • Author(s)
      冨田周作、牧野育代、矢作裕司
    • Organizer
      日本機械学会関東支部第20期総会講演会
    • Year and Date
      2014-03-15
    • Related Report
      2013 Final Research Report
  • [Presentation] 受熱期の貯水池流入部における成層形成が光合成藻類の増殖に及ぼす影響2014

    • Author(s)
      冨田周作、牧野 育代、矢作 裕司
    • Organizer
      日本機械学会 関東支部第20期総会・講演会
    • Place of Presentation
      東京
    • Related Report
      2013 Annual Research Report
  • [Presentation] 湖の藍藻発生に及ぼす水温と貯水量の影響2013

    • Author(s)
      神田尊貴、牧野育代、矢作裕司
    • Organizer
      日本機械学会関東支部第19期総会講演会
    • Year and Date
      2013-03-16
    • Related Report
      2013 Final Research Report
  • [Presentation] 河川水質特性と滞留時間による貯水池汚濁機構2013

    • Author(s)
      高橋潤吉、牧野育代、矢作裕司
    • Organizer
      日本機械学会関東支部第19期総会講演会
    • Year and Date
      2013-03-16
    • Related Report
      2013 Final Research Report
  • [Presentation] Impact of warm water in upstream on water quality of headwaters reservoir2013

    • Author(s)
      Ikuyo Makino, Yuji Yahagi
    • Organizer
      EMECS10–MEDCOAST2013 Joint Conference
    • Place of Presentation
      Marmaris Turkey
    • Related Report
      2013 Final Research Report
  • [Presentation] Impact of Warm Water in Stream on Water Quality of Headwater Reservoir2013

    • Author(s)
      Ikuyo Makino, Yuji Yahagi
    • Organizer
      Global Congress on ICM, Proceedings of EMECS 10- MEDCOAST 2013 Joint Conference
    • Place of Presentation
      Marmaris, Turkey
    • Related Report
      2013 Annual Research Report
  • [Presentation] 河川水質特性と滞留時間による貯水池汚濁機構2013

    • Author(s)
      高橋潤吉,牧野育代,矢作裕司
    • Organizer
      日本機械学会関東支部第19期総会講演会
    • Place of Presentation
      首都大学東京
    • Related Report
      2012 Research-status Report
  • [Presentation] 湖の藍藻発生に及ぼす水温と貯水量の影響2013

    • Author(s)
      高橋潤吉,牧野育代,矢作裕司
    • Organizer
      日本機械学会関東支部第19期総会講演会
    • Place of Presentation
      首都大学東京
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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