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The influence on polymorph selection of carbonate in biomineralization by chemical components in seawater and symbiotic relationship

Research Project

Project/Area Number 17K17671
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Petrology/Mineralogy/Economic geology
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

MOTAI Satoko  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 特別研究員(PD) (70795228)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords生体鉱物 / 造礁サンゴ / 共生藻 / 多形 / 海水Mg/Caモル比 / カルシウム炭酸塩 / 鉱物相 / 褐虫藻 / 炭酸塩カルシウム / 炭酸塩 / 海水組成
Outline of Final Research Achievements

Reef-building corals form skeletons of aragonite (CaCO3). This study examined the influence on calcification by symbiotic relationship between corals and zooxanthellae. When corals grown without symbiotic relationship in the calcite sea, which had the chemical compositions let corals precipitate calcite, corals formed calcite. Furthermore, corals formed trace amount of calcite in the aragonite sea, when they had no symbiotic relationship.

Academic Significance and Societal Importance of the Research Achievements

造礁サンゴは三畳紀には出現し、現在までの生存している動物である。造礁サンゴは褐虫藻と共生関係にあり、その関係がサンゴの成長を支えていると考えられている。褐虫藻について着目した本研究では、褐虫藻がサンゴの骨格形成に関係していることを明らかにした。今後、サンゴ骨格の化石の研究と合わせることで、共生の進化過程の解明に貢献することが期待される。

Report

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

    (2 results)

All 2019 2017

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Skeleton microstructures of aposymbiotic scleractinian coral cultured in seawater with various Mg/Ca ratios2019

    • Author(s)
      甕聡子、富岡尚敬、川野潤、波利井佐紀、永井隆哉、渡邊剛、兒玉優、伊藤元雄
    • Organizer
      地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] The mineralogical features of aposymbiotic coral skeletons cultured in seawater varied Mg/Ca molar ratios2017

    • Author(s)
      Satoko Motai Jun Kawano, Saki Harii, Tsuyoshi Watanabe, Takaya Nagai
    • Organizer
      14th International Symposium on Biomineralization
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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

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