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History of ecosystem disturbances associated with mega-tsunamis in the Sanriku Coast reveled by genetic population structure of direct-developing species

Research Project

Project/Area Number 24651004
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

KOJIMA Shigeaki  東京大学, 新領域創成科学研究科, 教授 (20242175)

Co-Investigator(Kenkyū-buntansha) MATSUMASA Masatoshi  岩手医科大学, 共通教育センター, 教授 (50219474)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords三陸海岸 / 巨大津波 / ホソウミニナ / コアレセント理論 / ベイス法 / 集団サイズ変動 / ウミニナ / 遺伝的多様性 / 集団構造
Outline of Final Research Achievements

Distribution of tideland snails on the Sanriku Coast was surveyed in May 2012. In some areas, their main habitats have been lost but a few individuals survived in the neighboring habitats. Peaks of recruitment of the Asian horn snail Batillaria attramentaria, which is a direct-developing species, were recognized each once in spring and summer in the northern part of the Sanriku region. Phylogeographic analyses based on the coalescence theory were conducted to reveal historical changes of population size of this species. By analyses using nucleotide sequences of a mitochondrial COI gene and a nuclear ITS1 region, a rapid decrease of the population size during the last glacial period and a subsequent recovery were shown. Analyses using 28 kinds of microsatellites showed rapid decreases of the population size corresponding to the 2011 Tohoku Earthquake and the Chile Tsunami in 1960.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (5 results)

All 2015 2014 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (3 results)

  • [Journal Article] 三陸の渚:その大規模撹乱に対する脆弱性と頑強性2015

    • Author(s)
      松政正俊・木下今日子・伊藤 萌・小島 茂明
    • Journal Title

      DNA多型

      Volume: 未定

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Isolation and characterization of microsatellite loci in the intertidal snail Batillaria multiformis (Mollusca Gastropoda)2014

    • Author(s)
      Itoh, H., S. Kamimura, K. Hirose and S. Kojima
    • Journal Title

      Conservation Genetics Resources

      Volume: 6 Issue: 1 Pages: 193-195

    • DOI

      10.1007/s12686-013-0046-y

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 東京湾におけるホソウミニナの遺伝的集団構造

    • Author(s)
      伊藤 萌・小島茂明・上村了美
    • Organizer
      2012年度日本プランクトン学会・日本ベントス学会合同大会
    • Place of Presentation
      東邦大学(千葉県船橋市)
    • Related Report
      2012 Research-status Report
  • [Presentation] 東京湾におけるホソウミニナの遺伝的集団構造

    • Author(s)
      伊藤 萌・上村了美・小島茂明
    • Organizer
      第60回日本生態学会大会
    • Place of Presentation
      静岡県コンベンションアーツセンター(静岡県静岡市)
    • Related Report
      2012 Research-status Report
  • [Presentation] 新しい潮間帯はどうなっているか ―広田湾・小友浦を中心に

    • Author(s)
      松政正俊・木下今日子
    • Organizer
      第60回日本生態学会大会(企画集会T11-4)
    • Place of Presentation
      静岡県コンベンションアーツセンター(静岡県静岡市)
    • Related Report
      2012 Research-status Report

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

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