Updated on 2025/05/14

写真a

 
HAYASHI TATSUYA
 
Organization
Faculty of Social and Cultural Studies Department of Environmental Changes Associate Professor
Graduate School of Integrated Sciences for Global Society Department of Integrated Sciences for Global Society（Concurrent）
Title
Associate Professor
Contact information
メールアドレス
Profile
My interests are taxonomy, evolution, and ecology of marine and lacustrine diatoms and their relationship with Cenozoic climatic and environmental changes. I am also interested in reconstructing Cenozoic paleoclimatic and environmental records based on multi-proxy studies on marine and lake sediments. In particular, I currently work on a research project to determine the cause of the initiation of the glacial-interglacial cycles in the North Atlantic about 2.7 million years ago by analyzing various paleoenvironmental proxies.
Homepage
External link

Research Areas

  • Natural Science / Biogeosciences

  • Environmental Science/Agriculture Science / Environmental dynamic analysis

Degree

  • Ph.D

Research History

  • 御船町恐竜博物館  学芸員 

    2012年4月–2017年3月　御船町恐竜博物館　学芸員

    2012.4 - 2017.3

Education

  • Kyushu University   大学院比較社会文化学府  

    2004.4 - 2007.3

  • Kyushu University   大学院比較社会文化学府  

    2002.4 - 2004.3

  • Kyushu University   理学部   地球惑星科学科

    1997.4 - 2001.3

Research Interests・Research Keywords

  • Research theme： Cenozoic evolutionary history of planktonic diatoms

    Keyword： marine and lacustrine diatoms, evolution, ecology, taxonomy

    Research period： 2012.4

  • Research theme： Intensification of Northern hemisphere glaciation and glacial-interglacial cycles over the past 3 Myr

    Keyword： Northern hemisphere glaciation, glacial-interglaical cycles, North Atlantic, AMOC

    Research period： 2007.4

  • Research theme： Middle to Late Pleistocene Indian monsoon changes and environmental changes in the Kathmandu Basin, Nepal

    Keyword： Indian monsoon, fossil diatoms, Paleo-Kathmandu Lake, Middle to Late Pleistocene, Nepal

    Research period： 2000.4

Awards

  • 論文賞

    2017.5   日本珪藻学会   論文タイトル：Morphological variability of Cyclostephanos ramosus sp. nov. from Pleistocene sediments of the Paleo-Kathmandu Lake, Nepal

  • 論文賞

    2013.9   日本粘土学会   論文タイトル：Cool-stage AFM, a new AFM method for in situ observations of mineral growth and dissolution at reduced temperature: Investigation of the responsiveness and accuracy of the cooling system and a preliminary experiment on barite growth

  • 最優秀ポスター賞

    2008.8   MRC（微化石リファレンスセンター）研究発表会   演題：古カトマンズ湖の珪藻群集の変化とインドモンスーン変動の関係

Papers

  • Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation Reviewed International journal

    @Tatsuya Hayashi, @Toshiro Yamanaka, @Yuki Hikasa, @Masahiko Sato, @Yoshihiro Kuwahara, @Masao Ohno

    Communications Earth & Environment   1   1 - 10   2020.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    The global climate has been dominated by glacial–interglacial variations since the intensification of Northern Hemisphere glaciation 2.7 million years ago. Although the Atlantic meridional overturning circulation has exerted strong influence on recent climatic changes, there is controversy over its influence on Northern Hemisphere glaciation because its deep limb, North Atlantic Deep Water, was thought to have weakened. Here we show that Northern Hemisphere glaciation was amplified by the intensified Atlantic meridional overturning circulation, based on multi-proxy records from the subpolar North Atlantic. We found that the Iceland–Scotland Overflow Water, contributing North Atlantic Deep Water, significantly increased after 2.7 million years ago and was actively maintained even in early stages of individual glacials, in contrast with late stages when it drastically decreased because of iceberg melting. Probably, the active Nordic Seas overturning during the early stages of glacials facilitated the efficient growth of ice sheets and amplified glacial oscillations.

    DOI： doi.org/10.1038/s43247-020-00023-4

    Other Link： https://www.nature.com/articles/s43247-020-00023-4

    Repository Public URL： https://hdl.handle.net/2324/7177882

  • The turnover of continental planktonic diatoms near the middle/late Miocene boundary and their Cenozoic evolution Reviewed International journal

    @Tatsuya Hayashi, @William N. Krebs, @Megumi Saito-Kato, @Yoshihiro Tanimura

    PLoS ONE   13 ( 6 )   2018.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    Fossil evidence indicates that modern assemblages of temperate nonmarine planktonic diatoms began near the middle/late Miocene boundary when the genus Actinocyclus, an important constituent of lacustrine planktonic diatom assemblages during the early to middle Miocene, was replaced by genera of the family Stephanodiscaceae. This floral turnover has been confirmed in many regions of the world, except eastern Asia where taxonomic data about early and middle Miocene planktonic diatom assemblages have until recently been scarce. Our analysis of Lower and Middle Miocene lacustrine diatomaceous rocks in Japan confirms that species of nonmarine Actinocyclus were important constituents of lake phytoplankton there as well. The appearance of nonmarine Actinocyclus species near the beginning of the Miocene may have resulted from the introduction of euryhaline species into lacustrine environments during a highstand of sea level at that time. Similarly, it is possible that species of Stephanodiscaceae evolved from marine thalassiosiroid ancestors that invaded high latitude lacustrine environments during multiple Paleogene highstands, resulting in a polyphyletic origin of the family. The turnover from nonmarine Actinocyclus to Stephanodiscaceae genera near the middle/late Miocene boundary may be linked to a contemporaneous increase in silica concentrations in lakes caused by active volcanism, increased weathering of silicate rocks due to orogeny, and the expansion of C4 grasslands. This turnover may also have been influenced by enhanced seasonal environmental changes in the euphotic zone caused by the initiation of monsoon conditions and a worldwide increase in meridional temperature gradients during the late Miocene. Morphological characteristics of Stephanodiscaceae genera, such as strutted processes and small size, suggest their species were better adapted to seasonal environmental changes than nonmarine species of Actinocyclus because of their superiority in floating and drifting capabilities and possibly metabolism, intrinsic growth rate, and reproductivity. As climates deteriorated during the late Miocene, Stephanodiscaceae species may have spread from high latitudes to temperate lakes where they diversified, ultimately displacing Actinocyclus.

    DOI： doi.org/10.1371/journal.pone.0198003

    Other Link： https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0198003

    Repository Public URL： https://hdl.handle.net/2324/7174369

  • Morphological variability of Cyclostephanos ramosus sp. nov. from Pleistocene sediments of the Paleo-Kathmandu Lake, Nepal Reviewed International journal

    Tatsuya Hayashi, Yoshihiro Tanimura

    Diatom   31   1 - 11   2015.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    A new diatom species, Cyclostephanos ramosus sp. nov., is described from Pleistocene sediments of the Paleo-Kathmandu Lake, Nepal. Cyclostephanos ramosus is a polymorphic species characterized by three morphological variations, which are related to valve silicification, valve size and stratigraphic distribution. Heavily-silicified valves exhibit an annulus and network-like structures in the valve center and narrow secondary costae in the mantle area. Other valves have a variable number of valve face areolae, mantle areolae, costae, and mantle fultoportulae, and show differences in the shape of the mantle costae. The number of costae and mantle fultoportulae also shows variations related to stratigraphic distribution, which occur on a time scale of a few tens of thousands of years. On the basis of morphological characteristic features, C. ramosus is most similar to Cyclostephanos malawiensis, but differs in its domed cribra on the mantle, much deeper mantle and larger distance between spines and mantle fultoportulae. The three morphological variations have different implications. Valves showing variation in silicification reflect an eco-morphological response to available silica, while valves with size-related variations show morphological modification brought about by vegetative cell divisions. The stratigraphic variations are highly suggestive because they indicate that the number and shape of costae, which have been traditionally used to delineate Cyclostephanos species, can vary intraspecifically on long time scales. These facts suggest the careful examination of intraspecific morphological variations on various time scales is required for the taxonomy of Cyclostephanos.

    Other Link： https://www.jstage.jst.go.jp/article/diatom/31/0/31_1/_article

  • Monospecific planktonic diatom assemblages in the Paleo-Kathmandu Lake during the middle Brunhes Chron: implications for the paradox of the plankton Reviewed International journal

    Tatsuya Hayashi

    Palaeogeography, Palaeoclimatology, Palaeoecology   300 ( 1-4 )   46 - 58   2011.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.palaeo.2010.12.007

  • Millennial-scale iceberg surges after intensification of Northern Hemisphere glaciation Reviewed International journal

    Tatsuya Hayashi, Masao Ohno, Gary Acton, Yohan Guyodo, Helen F. Evans, Toshiya Kanamatsu, Fumiki Komatsu, Fumi Murakami

    Geochemistry, Geophysics, Geosystems   11 ( 9 )   2010.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1029/2010GC003132

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Books

  • 微化石 — 顕微鏡で見るプランクトン化石の世界 —

    林 辰弥（Role：Sole author）

    東海大学出版会  2012.8 

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    Responsible for pages：240–257   Language：Japanese   Book type：Scholarly book

Presentations

  • 北大西洋深層水は北半球氷床化に関与したのか? Invited

    @林辰弥，@大野正夫，@佐藤雅彦，@日笠友暉，@山中寿朗，#槙尾雅人，@桑原義博

    日本地球惑星科学連合2018年大会  2018.5 

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    Event date： 2018.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：幕張メッセ   Country：Japan  

    現在まで続く氷期−間氷期サイクルは、鮮新世の最後に本格的に開始したことが知られているものの、その初期変動の特徴はよく分かっていない。そこで演者らは、アイスランド南方沖で回収されたドリフト堆積物（IODP Site U1314コア）のマルチプロキシー分析によって、高緯度の環北大西洋地域における数百〜数千年規模の大陸氷床の崩壊由来の氷山と北大西洋深層水の変動の関係を調査している。本発表では、MIS 95（約240万年前）よりも前のそれらの詳細な変動パターンを報告する。大陸氷床の崩壊を表すIce rafted debris (IRD)は、MIS G4以降の氷期に急激に増え、MIS 100＆96氷期にのみ2000〜5000年の間隔で繰り返すイベントが確認される。一方、MIS 98氷期は、MIS 100＆96氷期よりもむしろ初期のMIS 104、G２、G4氷期に似ており、１回の大規模IRDイベントによって特徴付けられる。岩石磁気分析（等温残留磁化付加実験）からは、いずれの大陸氷床の崩壊（IRD）イベントも、北大西洋深層水の一時的な衰退を伴っていたことが分かった。

  • 淡水珪藻化石のより精度の高い生層序は確立できるか？ International coauthorship

    齋藤めぐみ・林辰弥・羽田裕貴・William N. Krebs

    MRC 研究発表会  2024.3 

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    Event date： 2025.3

  • 北米における新生代の珪藻化石調査 International coauthorship

    齋藤めぐみ，林 辰弥，羽田裕貴，William Krebs

    日本珪藻学会第 43 回研究集会  2024.10 

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    Event date： 2024.10

    Venue：滋賀県立琵琶湖博物館  

  • Thalassiosira lindstroemiiの分類と形態

    林辰弥

    日本珪藻学会第 43 回研究集会  2024.10 

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    Event date： 2024.10

    Venue：滋賀県立琵琶湖博物館  

  • 270-250 万年前の北大西洋高緯度域 における浮遊性有孔虫群集組成変化

    岡崎裕典・村中美樹・木元克典・林辰弥

    日本古生物学会2024年年会  2024.6  日本古生物学会

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    Event date： 2024.6

    Presentation type：Poster presentation  

    Venue：高知大学  

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Professional Memberships

  • Japan Association for Quaternary Research

  • Japanese Society of Diatomology

  • International Society for Diatom Research

  • Palaeontological Society of Japan

  • Geological Society of Japan

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Committee Memberships

  • 日本珪藻学会   運営委員   Domestic

    2025.4   

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    Committee type：Academic society

Academic Activities

  • Screening of academic papers

    Role(s)： Peer review

    2024

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    Type：Peer review 

    Number of peer-reviewed articles in Japanese journals：1

  • 実行委員会委員

    日本古生物学会第 172 回例会  （ Japan ） 2023.2

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2023

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：3

  • Screening of academic papers

    Role(s)： Peer review

    2022

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

    Number of peer-reviewed articles in Japanese journals：1

  • Screening of academic papers

    Role(s)： Peer review

    2020

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

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Research Projects

  • 急激な世界的気候変動を引き起こす大陸氷床－大西洋子午面循環メカニズムの再検証

    Grant number：22H03735  2022 - 2025

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 氷期ー間氷期サイクルの誕生と初期進化：北大西洋深層水の役割に関する新仮説の検証

    Grant number：18H03358  2018 - 2020

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 古気候・古環境復元に関わる最先端研究の環境整備

    2018

    若手研究者研究環境整備経費（九州大学ルネッサンスプロジェクト）

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    Authorship：Principal investigator  Grant type：On-campus funds, funds, etc.

  • 氷期—間氷期サイクルの開始に伴う北大西洋深層水変動の研究と生きた教育普及活動

    2016

    全国科学博物館活動等助成事業

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    Authorship：Principal investigator  Grant type：Contract research

  • 新生代におけるプランクトン珪藻の進化史の復元 International coauthorship

    2012.4

    九州大学（日本） 

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    Authorship：Principal investigator 

    新生代におけるプランクトン珪藻の進化史の解明を目的として、国内外の研究者と協力して世界各地から珪藻化石を収集し、その分類や形態解析を行い、生態・進化学的な側面から研究を進めている

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Educational Activities

  • 基幹教育： ①基幹教育セミナー、②理系ディシプリン科目、「最先端地球科学」、「地球と宇宙の科学」、③高年次基幹教育科目「地球の進化と環境」
    大学院地球社会統合科学府： ①共通科目「チュートリアル I」、「地球社会統合科学」、「地球社会フィールド調査法」②基礎科目「包括的地球科学C」、③専門科目「演習（環境微古生物学 I~IV, V~VIII）」、「総合演習（包括的地球科学コース） I~IV」、「総合演習(包括的東アジア･日本研究コースD) I~IV」、「フィールド調査実習」、「個別研究指導 I~III」

    【過去の教育活動】
    基幹教育：理系ディシプリン科目「自然科学総合実験（地球科学実験：地球の形成と構成物質）」（2017〜2020年度）、「基礎科学実習（地球科学）」（2021〜2022年度）

Class subject

  • 高年次科目「地球の進化と環境」

    2024.10 - 2025.3   Second semester

  • 総合演習（包括的東アジア・日本研究 D）IV

    2024.10 - 2025.3   Second semester

  • 総合演習（包括的東アジア・日本研究 D）II

    2024.10 - 2025.3   Second semester

  • 総合演習（包括的地球科学コース）IV

    2024.10 - 2025.3   Second semester

  • 総合演習（包括的地球科学コース）II

    2024.10 - 2025.3   Second semester

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FD Participation

  • 2024.11   Role：Participation   Title：ハラスメント対応・防止研修

    Organizer：[Undergraduate school/graduate school/graduate faculty]

  • 2024.10   Role：Planning   Title：ハラスメント防止研修 　〜自己主張・他者受容のためのコミュニケーションスキル習得について〜

  • 2024.8   Role：Participation   Title：留学生のための出願前支援について

    Organizer：[Undergraduate school/graduate school/graduate faculty]

  • 2023.12   Role：Participation   Title：受託研究・共同研究の推進セミナー

    Organizer：[Undergraduate school/graduate school/graduate faculty]

  • 2023.12   Role：Participation   Title：研究データ管理・公開に係る部局説明会

    Organizer：[Undergraduate school/graduate school/graduate faculty]

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Visiting, concurrent, or part-time lecturers at other universities, institutions, etc.

  • 2025  西南学院大学  Classification:Part-time lecturer 

    Semester, Day Time or Duration：前期月曜１・２限目

  • 2025  福岡大学・理学部  Classification:Part-time lecturer 

    Semester, Day Time or Duration：前期月曜１・２限目

  • 2024  福岡大学・理学部  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：前期月曜１・２限目

  • 2023  福岡大学・理学部  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：前期月曜１・２限目

  • 2022  福岡大学・理学部  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：前期月曜１・２限目

Participation in international educational events, etc.

  • 2016.11

    モンタナ州立大学附属ロッキー博物館・御船町恐竜博物館

    Building Community Partnerships: The Japan-U.S. Natural Science Museums Project

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    Venue：日本・熊本県

Other educational activity and Special note

  • 2025  Special Affairs  学振特別研究員申請支援セミナー（研究計画書書き方セミナー）の講師

  • 2024  Special Affairs  学振特別研究員申請支援セミナー（研究計画書書き方セミナー）の講師

  • 2019  Special Affairs  修士・博士課程学生等を対象とした「研究計画書の書き方合宿」における指導

    　詳細を見る

    修士・博士課程学生等を対象とした「研究計画書の書き方合宿」における指導

  • 2019  Special Affairs  修士・博士課程学生等を対象とした「研究計画書き方セミナー」における指導

    　詳細を見る

    修士・博士課程学生等を対象とした「研究計画書き方セミナー」における指導

  • 2018  Special Affairs  修士・博士課程学生等を対象とした「研究計画書の書き方合宿」における指導

    　詳細を見る

    修士・博士課程学生等を対象とした「研究計画書の書き方合宿」における指導

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Social Activities

  • 御船町恐竜博物館における地球環境と生物の共進化に関する展示・教材開発（協力研究員）

    Role(s)：Advisor,　Informant

    2022 - 2025

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    御船町恐竜博物館における地球環境と生物の共進化に関する展示・教材開発（協力研究員）（2025年度まで）

  • 時の文化史と地球史：現代の｢氷河期｣はいつから始まったのか

    九州大学大学院地球社会統合科学府提携講座  朝日カルチャーセンター福岡教室  2019.7

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    Audience：General,　Scientific,　Company,　Civic organization,　Governmental agency

    Type：Lecture

  • さまざまな地図を科学する２：大陸が移動すると気候も変わる

    九州大学大学院地球社会統合科学府提携講座  朝日カルチャーセンター福岡教室  2018.12

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    Audience：General,　Scientific,　Company,　Civic organization,　Governmental agency

    Type：Lecture

  • 微化石をテーマにした講義と実験

    筑紫女学園中学校  2018.7

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    Audience：Infants,　Schoolchildren,　Junior students,　High school students

    Type：Seminar, workshop

  • 微化石をテーマとした小学生向けの地学実験

    唐津私立加唐小学校  2017.9

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    Audience：Infants,　Schoolchildren,　Junior students,　High school students

    Type：Seminar, workshop

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Media Coverage

  • 御船町恐竜博物館の熊本地震後の復興・再開 Newspaper, magazine

    読売新聞  2016.7

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    御船町恐竜博物館の熊本地震後の復興・再開

  • 御船町恐竜博物館における化石展示物紹介 TV or radio program

    KKTくまもと県民テレビ「テレビタミン」  2014.4

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    御船町恐竜博物館における化石展示物紹介

  • 御船町恐竜博物館の化石の紹介 TV or radio program

    FMK「Morning Glory: ヒューマンラボ」  2014.3

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    御船町恐竜博物館の化石の紹介

Travel Abroad

  • 2024.9

    Staying countory name 1：United States   Staying institution name 1：アイダホ州マウンテンホーム近郊

  • 2013.7

    Staying countory name 1：United States   Staying institution name 1：モンタナ州立大学

  • 2010.9

    Staying countory name 1：Germany   Staying institution name 1：ブレーメン大学

  • 2001.10 - 2001.11

    Staying countory name 1：Nepal   Staying institution name 1：トリブバン大学