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Chilean fossil swampy flora could be a key to infer how the Southern American flora was established

Research Project

Project/Area Number 15H05233
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Biodiversity/Systematics
Research InstitutionOsaka City University (2017-2018)
Kanazawa University (2015-2016)

Principal Investigator

Yamada Toshihiro  大阪市立大学, 大学院理学研究科, 教授 (70392537)

Co-Investigator(Kenkyū-buntansha) 海老原 淳  独立行政法人国立科学博物館, 植物研究部, 研究主幹 (20435738)
矢部 淳  独立行政法人国立科学博物館, 地学研究部, 研究主幹 (20634124)
朝川 毅守  千葉大学, 大学院理学研究院, 講師 (50213682)
LEGRAND Julien  中央大学, 理工学部, 助教 (60737534)
西田 治文  中央大学, 理工学部, 教授 (70156082)
Research Collaborator TERADA Kazuo  
LEPPE Marcelo  
HINOJOSA L Felipe  
LÓPEZ-SEPÚLVEDA Patricio  
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords南米 / チリ / ゴンドワナ / ミズゴケ / 湿地 / 温暖化 / 化石 / 南半球の植物相 / キリキナ層 / クラニラウエ層 / 周南極分布 / 植物相 / 植物化石 / 白亜紀 / 始新世 / 古植物学 / 古植生 / 植生 / 南半球 / ミズゴケ湿地 / 珪化泥炭 / ナンヨウスギ
Outline of Final Research Achievements

In the Southern Hemisphere, there are many plants which had appeared during the Cretaceous (called Gondowana-type plants, hereafter). Recently, we have found a peat bed of ca. 50 million years ago (Ma) in Chile, which contains autochthonously preserved Gondwana-type plants. This peat bed is likely the oldest peat bed formed through deposition of Sphagnum moss (Sphagnum peat) and its deposition would be happened during the Paleocene/Eocene Thermal Maximum (PETM). Therefore, these preliminary findings might imply that Gondwana-type plants refuged to Sphagnum bogs to avoid high temperature during PETM and this event would be a crucial step for their survival to the present. In this study, we confirmed that the peat is originated in Sphagnum bog during 54 Ma. In addition, we conducted paleobotanical studies on Gondwana plants before/after PETM to know how PETM affected vegetational history in the South America.

Academic Significance and Societal Importance of the Research Achievements

南半球には独特の生物相が存在する。この独自性がどのように成立したのかは,かのダーウィン以来,生物学者を引きつけ続けてきた。私たちは南米固有の植物相の成立に,過去の地球温暖化が大きく寄与したことを示した。温暖化が起きたことで,それまでの地球に跋扈したグループが絶滅したこともわかった。これらの結果は,温暖化により地球規模での植生変化が起こりうることを示唆する。従って,地球温暖化が問題視される今日において、この結果は非常に大きな意味を持つだろう。

Report

(4 results)
  • 2018 Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (10 results)

All 2019 2018 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Int'l Joint Research: 4 results)

  • [Int'l Joint Research] Instituto Antartico Chileno/Universidad de Chile/Universidad de Concepcioin(チリ)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Universidad de Chile/Instituto Antartico Chileno/Universidad de Concepcion(Chile)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Sueria laxinervis, a new fossil species of Cycadales from the Upper Cretaceous Quiriquina Formation in Cocholg?e, B?ob?o Region, Chile2019

    • Author(s)
      YAMADA TOSHIHIRO、YAMADA TAKAE F.、TERADA KAZUO、OHSAWA TAKESHI A.、YABE ATSUSHI、LEGRAND JULIEN、UEMURA KAZUHIKO、LEPPE MARCELO、HINOJOSA LUIS FELIPE、L?PEZ-SEP?LVEDA PATRICIO、NISHIDA HARUFUMI
    • Journal Title

      Phytotaxa

      Volume: 402 Issue: 2 Pages: 126-126

    • DOI

      10.11646/phytotaxa.402.2.7

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Araucarian leaves and cone scales from the Loreto Formation of Rio de Las Minas, Magellan Region, Chile2016

    • Author(s)
      Ohsawa TA, Yabe A, Yamada T, Uemura K, Terada K, Leppe M, Hinojosa LF, Nishida H
    • Journal Title

      Botany

      Volume: 94 Issue: 9 Pages: 805-815

    • DOI

      10.1139/cjb-2016-0059

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Non-congruent fossil and phylogenetic evidence on the evolution of climatic niche in the Gondwana genus Nothofagus2015

    • Author(s)
      Luis Felipe Hinojosa, Aurora Gaxiola, Maria Fernanda Perez, Francy Carvajal, Maria Francisca Campano, Mirta Quattrocchio, Harufumi Nishida, Kazuhiko Uemura, Atsushi Yabe, Ramiro Bustamante, Mary T. K. Arroyo
    • Journal Title

      Journal of Biogeography

      Volume: 43 Issue: 3 Pages: 555-567

    • DOI

      10.1111/jbi.12650

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] チリ南部コチョルゲ産後期白亜紀(マーストリヒチアン)のヒノキ科コウヨウザン亜科シュート鉱化化石2019

    • Author(s)
      西田ちづる・西田治文・山田敏弘・寺田和雄・矢部淳・Luis Felipe Hinojosa・Julien Legrand・Patricio Lopez-Sepulveda・朝川毅守
    • Organizer
      日本古生物学会第168回例会(神奈川)
    • Related Report
      2017 Annual Research Report
  • [Presentation] New anatomically preserved conifer remains of subfamily Cunninghamioideae (Cupressaceae) from the Late Cretaceous (Maastrichtian) Quiriquina Formation of Cocholgue, south Chile2018

    • Author(s)
      Chizuru Nishida, Harufumi Nishida, Toshihiro Yamada, Kazuo Terada, Atsushi Yabe, Luis Felipe Hinojosa, Julien Legrand, Patricio Lopez, Takeshi Asakawa
    • Organizer
      5th International Palaeontological Congress (Paris, France)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Floristic and climatic changes in Chilean Patagonia inferred from new palynological results2016

    • Author(s)
      Julien Legrand; Harufumi Nishida; Toshihiro Yamada; Marcelo Leppe
    • Organizer
      XIV International Palynological Congress / XIV International Palynological Congress X International Organisation of Palaeobotany Conference X International Organisation of Palaeobotany Conference
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A new permineralized fertile leaf of Schizaeaceae from the Late Cretaceous of Livingston Island, Antarctica2016

    • Author(s)
      Harufumi Nishida; Marcelo Leppe; Natsuki Saito; Julien Legrand
    • Organizer
      XIV International Palynological Congress XIV / International Palynological Congress X International Organisation of Palaeobotany Conference X International Organisation of Palaeobotany Conference
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anatomical characters for intrageneric classification of genus Pinus2016

    • Author(s)
      Mariko Yamada; Toshihiro Yamada
    • Organizer
      XIV International Palynological Congress XIV / International Palynological Congress X International Organisation of Palaeobotany Conference X International Organisation of Palaeobotany Conference
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2020-03-30  

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