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A study on the peculiarity of the marine algal flora of Ogasawara Islands in Japan.

Research Project

Project/Area Number 16K07496
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biodiversity/Systematics
Research InstitutionNational Museum of Nature and Science, Tokyo

Principal Investigator

Kitayama Taiju  独立行政法人国立科学博物館, 植物研究部, 研究主幹 (20270407)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords小笠原諸島 / 海藻相 / 浅所性 / 深所性 / 藻類 / 小笠原 / 植物地理学
Outline of Final Research Achievements

In order to uncover the peculiarity of the marine algal flora of Ogasawara islands, investigations were carried out in both shallow (littoral and infra littoral) and deep (sublittoral) water zones, resulted in collection of ca. 30 species from shallow zone and ca. 20 species from deep zone. Most of the shallow water species are also distributed in the Japanese Archipelago, though most of the deep sublittoral water species have no record from the archipelago, including Codium mamillosum, Lychaete bainesii (Ulvophyceae), Asteromenia peltata (Rhodophyceae) and a new species of Phaeophyceae, 'Umitampopo' (Japanese name). These suggested that the marine algal flora of Ogasawara Islands was formed with different mechanisms between shallow and deep sublittoral zones, and thus the traditional division of marine algal flora of Japan is not applicable.

Academic Significance and Societal Importance of the Research Achievements

小笠原諸島の海藻相は、これまでながく琉球列島と同様に日本列島の一部(日本海藻相5区分の第3区)としてみなされてきたが、本研究により浅所と深所で異なる由来をもつ特殊な海藻相であることが示唆され、海藻地理学上、日本列島に属さない第6の区として位置づけることが妥当と考えられた。同諸島から得られたチクビミル(新称)、サキボソシオグサ(新称)、ベニヤブレガサ(新称)などの日本新産種や、ウミタンポポ(新称)のような奇妙な形態をもつ新種の存在は、日本の海域にまだ未知の海藻がいることを物語っている。特にウミタンポポの発見は朝日新聞(平成29年2月26日)の社会面でも報じられ、少なからず社会的意義があった。

Report

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

    (8 results)

All 2019 2018 2017 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) Remarks (2 results)

  • [Journal Article] First record of genuine Codium mamillosum Harvey (Codiaceae, Ulvophyceae) from Japan2017

    • Author(s)
      Kitayama, Taiju
    • Journal Title

      Bulletin of the National Museum of Nature and Science, Ser. B

      Volume: 43 Pages: 93-98

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 父島沖で採取された日本新産海藻Lychaete bainesii(シオグサ科)の形態2019

    • Author(s)
      北山太樹
    • Organizer
      日本植物分類学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 小笠原の深所から採集された紅藻マサゴシバリ目の日本新産種について2018

    • Author(s)
      北山太樹
    • Organizer
      日本藻類学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 緑藻ボニンアオノリ(Umbraulva kuaweuweu)の遊泳細胞形成における遺伝子発現プロファイリング2018

    • Author(s)
      寺内真・北山太樹・川井浩史
    • Organizer
      日本藻類学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 小笠原の深所から採集された褐藻ケヤリモ目の新種について2017

    • Author(s)
      北山太樹・羽生田岳昭
    • Organizer
      日本藻類学会第41回大会
    • Place of Presentation
      高知大学(高知県・高知市)
    • Year and Date
      2017-03-24
    • Related Report
      2016 Research-status Report
  • [Presentation] 日本新産緑藻 Umbraulva kuaweuweu(新称:ボニンアオノリ)について2017

    • Author(s)
      川井浩史・羽生田岳昭・峯一朗・北山太樹
    • Organizer
      日本植物学会
    • Related Report
      2017 Research-status Report
  • [Remarks] 研究室コラム 3月22日 紅破れ傘

    • URL

      http://www.kahaku.go.jp/column/index.php?month=201801

    • Related Report
      2017 Research-status Report
  • [Remarks] ウミタンポポ

    • URL

      http://www.kahaku.go.jp/column/index.php?month=201701

    • Related Report
      2016 Research-status Report

URL: 

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

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