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Species diversity of cryophilic marine ostracods; the history clarified by fossil records

Research Project

Project/Area Number 18K06390
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45030:Biodiversity and systematics-related
Research InstitutionNihon University

Principal Investigator

OZAWA Hirokazu  日本大学, 生物資源科学部, 准教授 (20632045)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords生物多様性 / 貝形虫 / 分類 / 系統 / 新生代 / 北西太平洋 / 環境変動 / 化石 / 生活史 / 海洋環境変動 / 日本海 / 生物多様性変遷史 / 海洋環境変動史
Outline of Final Research Achievements

This research is studying marine cryophilic ostracods (crustacea) living in and around Japanese Islands. This study is trying to clarify their suitable living conditions for present habitats, the history from their birth to flourishing, places of the birth and flourishing, key factors of environmental changes for their diversifying process, with estimates for the phylogenetic relationship among plural species for two families. Furthermore this research will clarify the primary cryophilic fauna in the northwestern Pacific margin and the history of taxonomic diversity changes. For the last three years, this study obtained the basic data to be able to infer periods of the birth and environmental conditions of their habitats, with the
estimation for phylogenetic relationships based on pore distributional pattern on carapace for one genus of one family. We will represent these data on scientific journals and talks in academic meetings in domestic and international congress near future.

Academic Significance and Societal Importance of the Research Achievements

本研究は北西太平洋縁の新生代の好冷性生物の初期相と、分類学的多様性変遷史の解明を目指して解析を行った。特に400万年前以降は好冷性海生動物群の初期生物相が形成された重要な時期であるが、日本産海洋生物でその時期と前後の生物相変化について、科・属内レベルで種数変遷や種交代、種間の系統関係を古環境変動史も総合して詳しく論じた研究例はほとんど無い。そのためこのテーマについて研究する意義は大きい。また複数の新生代の地層産貝形虫化石群の解析に基づき、古海洋環境と変動史を検討した。これらは、日本列島沿岸で特に環境変動の激しかった、新生代の中新世以降の生物多様性変遷と海洋環境変動を解明する上で重要である。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] 教職課程科目「地学概論Ⅰ」における初歩的な計算問題の実践例と課題2021

    • Author(s)
      小沢広和・中井静子・佐藤武宏・中尾有利子
    • Journal Title

      教職課程紀要

      Volume: 4 Pages: 91-96

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 神奈川県藤沢市江の島の地質調査実習における地層と地形の観察―葉山層群と三浦層群の観察の手引き―2020

    • Author(s)
      小沢広和・中尾有利子・塚脇真二
    • Journal Title

      生物資源科学

      Volume: 29 Pages: 9-30

    • NAID

      40022310453

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 鎌倉市稲村ヶ崎の地質調査実習における地層と地形の観察―三浦層群逗子層の観察の手引き―2019

    • Author(s)
      小沢広和・中尾有利子
    • Journal Title

      生物資源科学

      Volume: 28 Pages: 13-26

    • NAID

      40021964070

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Paleoenvironmental analysis from fossil ostracod assemblages of the Middle Pleistocene Naganuma Formation in the Sagami Group, central Japan2019

    • Author(s)
      Ozawa, H. and Tanaka, G.
    • Journal Title

      Bulletin of the Geological Survey of Japan

      Volume: 70 Pages: 5-16

    • NAID

      130007631567

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 三浦半島南西部荒崎海岸の地質調査実習における地層と地形の観察―三浦層群三崎層の観察の手引き―2018

    • Author(s)
      小沢広和・中尾有利子
    • Journal Title

      生物資源科学

      Volume: 27 Pages: 13-32

    • NAID

      40021643066

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 下総層群木下層(MIS 5e)の貝形虫化石群集から推定される古東京湾の古環境変遷2021

    • Author(s)
      原島舞・中澤努・小沢広和・金子稔・石川博行・野村正弘・上松佐知子
    • Organizer
      日本地球惑星科学連合2021年大会(5月発表予定)
    • Related Report
      2020 Annual Research Report
  • [Presentation] 伊豆外浦湾アマモ場の葉上性貝形虫相(甲殻類)と生活史2019

    • Author(s)
      小沢広和・中尾有利子・中井静子・石井勇渡・金子夏美・佐藤大輝・松元一将
    • Organizer
      日本動物分類学会第55回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多摩川河口における貝形虫類Ishizakiella miurensisの殻サイズの季節変化2019

    • Author(s)
      浅野心・上山紗也加・小沢広和・中井静子・中尾有利子
    • Organizer
      2019年日本ベントス学会・日本プランクトン学会合同大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 富山県・八尾層群(前~中期中新世)産浅海および漸深海オストラコーダ化石群と産出意義2019

    • Author(s)
      小沢広和
    • Organizer
      日本古生物学会第168回例会
    • Related Report
      2018 Research-status Report
  • [Presentation] Bathyal ostracod fossils from the Early to Middle Miocene Yatsuo Group in central Japan and their implications for understanding the history of the Japan Sea opening2018

    • Author(s)
      Ozawa, H.
    • Organizer
      The Third Asian Ostracod Meeting, Kanazawa (JAPAN)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phytal ostracod fauna and its seasonal changes inhabiting eelgrass Zostera at Sotoura Bay of Izu Peninsula, central Japan2018

    • Author(s)
      Ozawa, H., Nakao, Y., Nakai, S., Ishii, H., Kaneko, N., Sato D., Matsumoto, K. and Ito, S.
    • Organizer
      The Third Asian Ostracod Meeting, Kanazawa (JAPAN)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Life cycle of Ishizakiella miurensis deduced from population dynamics2018

    • Author(s)
      Kamiyama. S., Nakao, Y. and Ozawa, H.
    • Organizer
      The Third Asian Ostracod Meeting, Kanazawa (JAPAN)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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