Study on temporal changes of environments and ecosystems in the Seto Inland Sea since the early modern times

• Project/Area Number: 25400498
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Shimane University
• Principal Investigator: IRIZUKI TOSHIAKI 島根大学, 総合理工学研究科(研究院), 教授 (60262937)
• Co-Investigator(Kenkyū-buntansha): NOMURA RITSUO 島根大学, 教育学部, 教授 (30144687) ; HIROSE KOTARO 神戸大学, 内海域環境教育研究センター, 特命助教 (60596427)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 瀬戸内海 / 生態系 / 時系列変化 / 貝形虫 / 珪藻 / 有機汚濁 / 重金属汚染 / 高度経済成長期 / 貝形虫分析 / XRF分析 / CHNS元素分析 / 珪藻分析 / 燧灘 / 播磨灘 / 粒度分析 / 14C年代測定

Outline of Final Research Achievements

The aim of the present study is to reconstruct temporal changes of anthropogenic and climatic impacts on the ecosystems mainly since the early modern times, based on several analyses of surface and core samples collected from the Seto Inland Sea, southwestern Japan. The results showed that centennial-scale marine climatic changes have influenced the biological productivity in the study areas (Harima-Nada, Hiuchi-Nada, Suo-Nada, and Beppu Bay). Moreover, organic and heavy metal pollutions from the early 19th century started to influence benthic organisms. In particular, the ostracode faunas changed drastically to those more vulnerable to human-induced eutrophication/hypoxia during the Japanese economic miracle in every area. Then heavy metal pollution and reduced environments have been improved but the ostracode faunas do not change.

Research Products

• [Journal Article] Centennial-scale East Asian summer monsoon intensity based on δ18O values in ostracode shells and its relationship to land-ocean air temperature gradients over the past 1700 years (2016)
  • Author(s): Yamada, K., Masuma, T., Sakai, S., Seto, K., Ogusa, H., Irizuki, T.
  • Journal Title: Geology Volume: 44 Issue: 4 Pages: 255-258
  • DOI: 10.1130/g37535.1
  • Peer Reviewed / Open Access
• [Journal Article] Orbital obliquity cycles recorded in the Kuroshio Current region, eastern Asia, around Plio-Pleistocene boundary (2016)
  • Author(s): Iwatani, H., Kondo, Y., Irizuki, T., Iwai, M., Ikehara, M.
  • Journal Title: Quaternary Science Reviews Volume: 140 Pages: 67-74
  • DOI: 10.1016/j.quascirev.2016.03.025
  • Peer Reviewed
• [Journal Article] Centennial- to millennial-scale change of Holocene shallow marine environments recorded in ostracode fauna, northeast Japan (2015)
  • Author(s): Toshiaki Irizuki, Miki Kobe, Ken’ichi Ohkushi, Hodaka Kawahata, Katsunori Kimoto
  • Journal Title: Quaternary Research Volume: 84 Issue: 3 Pages: 467-480
  • DOI: 10.1016/j.yqres.2015.10.006
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 古生物学的視点からみた出雲の自然と人々の生活 (2015)
  • Author(s): 入月俊明
  • Journal Title: 学術の動向 Volume: 10 Pages: 88-93
  • NAID: 130005124421
• [Journal Article] Linkage of deep sea rapid acidification process and extinction of benthic foraminifera in the deep sea at the Paleocene/Eocene transition (2015)
  • Author(s): Kawahata, H., Nomura, R., Matsumoto, K., Nishi, H.
  • Journal Title: Island Arc Volume: 24 Issue: 3 Pages: 301-316
  • DOI: 10.1111/iar.12106
  • Peer Reviewed / Open Access
• [Journal Article] Canterbury earthquake sequence, New Zealand, and its predecessors (2015)
  • Author(s): Hayward,B. W., Sabaa A. T., Figueira, B., Reid, C. M., Nomura, R.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 438 Pages: 213-225
  • DOI: 10.1016/j.palaeo.2015.07.050
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Impact of early Oligocene deep water circulation to the benthic foraminifera in the eastern equatorial Pacific (2015)
  • Author(s): Takata, H., Lee, J-m., Sakai, S., Nomura, R., Tsujimoto, A., Nishi, H., Khim, B.-K.
  • Journal Title: Micropaleontology Volume: 61 Pages: 177-184
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anthropogenic impacts on meiobenthic Ostracoda (Crustacea) in the moderately polluted Kasado Bay, Seto Inland Sea, Japan, over the past 70 years (2015)
  • Author(s): Irizuki, T., Ito, H., Sako, M., Yoshioka, K., Kawano, S., Nomura, R., Tanaka, Y.
  • Journal Title: Marine Pollution Bulletin Volume: 91 Pages: 149-159
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 炭素・窒素安定同位体比とメイオベントス相から見た瀬戸内海の底質環境の変遷 (2015)
  • Author(s): 駒井幸雄・米林甲陽・勝見尚也・入月俊明・辻本 彰・岡崎正規
  • Journal Title: 水環境学会誌 Volume: 38 Pages: 39-47
  • NAID: 130004923019
  • Peer Reviewed
• [Journal Article] Inspection of residual flow using 224Ra/228Ra ratios in the semi-closed water body of Nakaumi, a coastal lagoon in southwest Japan. (2015)
  • Author(s): Nomura, R., Inoue, M., Kofuji, H.
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 303 Issue: 2 Pages: 1595-1599
  • DOI: 10.1007/s10967-014-3680-2
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus (2015)
  • Author(s): Yamaguchi, T., Suzukii, H., Soe, A-N., Ttike, T., Nomura, R., Takai, M.
  • Journal Title: Zootaxa Volume: 3919 Issue: 2 Pages: 306-326
  • DOI: 10.11646/zootaxa.3919.2.4
  • Peer Reviewed
• [Journal Article] A paleobathymetric transition during the mid-Pliocene warm period: Ostracode evidence from Japan (2014)
  • Author(s): Iwatani, H., Murai, K., Irizuki, T., Yasuhara, M.
  • Journal Title: Palaeogeography, Palaeoecology, Palaeoclimatology Volume: 399 Pages: 173-186
  • DOI: 10.1016/j.palaeo.2013.12.034
  • Peer Reviewed
• [Journal Article] Microfossil biostratigraphy and paleoenvironments of the Upper Pliocene Kuwae Formation, Northeast Japan (2014)
  • Author(s): Goto, T., Irizuki, T., Hayashi, H., Yanagisawa, Y.
  • Journal Title: Paleontological Research Volume: 18 Issue: 3 Pages: 150-168
  • DOI: 10.2517/2014pr015
  • NAID: 40020109195
  • Peer Reviewed
• [Journal Article] Calibration of past water temperature in the Sea of Japan based on Mg/Ca ratios of ostracode shells of two shallow marine species in the genus Cytheropteron (2014)
  • Author(s): Yamada, K., Irizuki, T., Ikehara, K., Okamura, K.
  • Journal Title: Palaeogeography, Palaeoecology, Palaeoclimatology Volume: 410 Pages: 244-254
  • DOI: 10.1016/j.palaeo.2014.05.042
  • Peer Reviewed
• [Journal Article] Spatial variations in recent ostracode assemblages and bottom environments in Trincomalee Bay, northeast coast of Sri Lanka (2014)
  • Author(s): Iwatani, H., Young, S.M., Irizuki, T., Sampei, Y., Ishiga, H.
  • Journal Title: Micropaleontology Volume: 60 Pages: 509-518
  • Peer Reviewed
• [Journal Article] 宍道湖・中海水系の微細珪藻1．Chaetoceros minimus (Levander) D.Marino et al.の形態と分布 (2014)
  • Author(s): 廣瀬孝太郎・後藤敏一・大谷修司
  • Journal Title: Diatom Volume: 30 Pages: 179-189
  • NAID: 130005001845
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 福島県猪苗代湖の湖底堆積物コア（INW2012）の岩相層序と年代 (2014)
  • Author(s): 廣瀬孝太郎・長橋良隆・中澤なおみ
  • Journal Title: 第四紀研究 Volume: 53 Pages: 157-173
  • NAID: 130004700527
  • Peer Reviewed
• [Journal Article] 珪藻トピック 第1回珪藻の化石から過去の環境を探る (2013)
  • Author(s): 廣瀬孝太郎
  • Journal Title: Diatom Volume: 29 Pages: 58-60
  • NAID: 130005001836
• [Journal Article] 超音波印加による珪藻分析のための簡便な堆積物処理法 (2013)
  • Author(s): 廣瀬孝太郎・吉岡 薫・入月俊明・岩井雅夫・後藤敏一
  • Journal Title: 第四紀研究 Volume: 52 Pages: 213-224
  • NAID: 10031202364
  • Peer Reviewed
• [Journal Article] 岡山県児島湾における密度流拡散装置周辺の228Ra/226Ra 比の深度別変化 (2013)
  • Author(s): 野村律夫・辻本 彰・福田賢一・石黒貴裕
  • Journal Title: Laguna Volume: 20 Pages: 73-87
  • Peer Reviewed
• [Presentation] 堆積速度の違いが有孔虫群集へ与える意義：宍道湖を例として (2016)
  • Author(s): 野村律夫
  • Organizer: 日本古生物学会第165回例会
  • Place of Presentation: 京都大学
  • Year and Date: 2016-01-30
• [Presentation] 瀬戸内海播磨灘北西部の錦海湾における過去2400年間の環境変化 (2016)
  • Author(s): 米光亮貴・入月俊明・瀬戸浩二
  • Organizer: 汽水域研究会第4回例会
  • Place of Presentation: 松江市労働会館
  • Year and Date: 2016-01-10
• [Presentation] 隠岐島後重栖湾の最近の環境変化 (2016)
  • Author(s): 梅田隆之介・入月俊明・横地由美・河野重範・藤原勇樹・野村律夫・瀬戸浩二
  • Organizer: 汽水域研究会第4回例会
  • Place of Presentation: 松江市労働会館
  • Year and Date: 2016-01-10
• [Presentation] 別府湾北東部守江湾の最近の環境変化 (2016)
  • Author(s): 高橋潤・入月俊明・石賀裕明・瀬戸浩二・河野重範・米光亮貴
  • Organizer: 汽水域研究会第4回例会
  • Place of Presentation: 松江市労働会館
  • Year and Date: 2016-01-10
• [Presentation] 湖沼・内湾域の珪藻群集解析による古環境変動の復元 (2015)
  • Author(s): 廣瀬孝太郎
  • Organizer: 札幌古環境勉強会
  • Place of Presentation: 北海道大学
  • Year and Date: 2015-10-31
  • Invited
• [Presentation] 松島湾における2011年東北沖津波堆積物の特徴 (2015)
  • Author(s): 入月俊明・吉岡薫・鈴木淳・田中裕一郎・長尾正之・藤原治・河潟俊吾・河野重範・西村修・佐々木久雄・藤林恵
  • Organizer: 汽水域研究会2015年大会
  • Place of Presentation: 東北大学
  • Year and Date: 2015-10-03
• [Presentation] 松島湾内の現世底生有孔虫群集の変遷～大津波の影響と大津波後の変化～ (2015)
  • Author(s): 河潟俊吾・田中裕一郎・長尾正之・藤原治・鈴木淳・入月俊明・吉岡薫・河野重範・西村修・藤林恵・佐々木久雄
  • Organizer: 汽水域研究会2015年大会
  • Place of Presentation: 東北大学
  • Year and Date: 2015-10-03
• [Presentation] 汽水湖・中海における224Ra/228Ra比；224Ra/228Th比の分布特性と湖水の動き (2015)
  • Author(s): 野村律夫・辻本 彰・井上睦夫・小藤久毅
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-12
• [Presentation] Diatom assemblages as an indicator of human-induced environmental changes: Temporal distribution in coastal areas of the Seto Inland Sea, southwestern Japan (2015)
  • Author(s): Hirose, K., Yasuhara, M., Gotoh, T., Yoshioka, K., Mitamura, M., Irizuki, T., Yamazaki, H.
  • Organizer: XIX INQUA (International Union for Quaternary Research) Congress
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-08-02
  • Int'l Joint Research
• [Presentation] Temporal changes in coastal environments and meiobenthos with respect to artificial and/or natural environmental modification in the Oki Islands Global Geopark in southwestern Japan during the past few hundred years (2015)
  • Author(s): Irizuki, T., Kawano, S., Matsumoto, S., Yokoji, Y., Yasui, E., Nomura, R., Tsujimoto, A.
  • Organizer: XIX INQUA (International Union for Quaternary Research) Congress
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-08-01
  • Int'l Joint Research
• [Presentation] Collapse of sandbar and the impacts on lagoon organisms in Lake Fuhren-ko, eastern Hokkaido, Japan (2015)
  • Author(s): Nomura, R., Tsujimoto, A., Takata, H., Kawano, S.
  • Organizer: XIX INQUA (International Union for Quaternary Research) Congress
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-08-01
  • Int'l Joint Research
• [Presentation] Environmental behavior of radionuclide released from the Fukushima Daiichi Nuclear Power Station -The spatiotemporal distribution of radiocesium in the pond sediment of Akimotoko and Numazawako in Fukushima Prefecture, Japan (2015)
  • Author(s): Ishida, M., Hinokio, R., Hirose, K., Yamasaki, H.
  • Organizer: XIX INQUA (International Union for Quaternary Research) Congress
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] Paleoenvironments analysis for the past 50 ka based on TOC, TN and pollen analysis of the sediment cores INW2012-1 and -2, Lake Inawashiro, northeast Japan (2015)
  • Author(s): Watanabe, K., Nagahashi, Y., Hirose, K., Kumon, F.
  • Organizer: XIX INQUA (International Union for Quaternary Research) Congress
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] 陸奥湾の完新世貝形虫群集と環境の100～1000年スケールの変化 (2015)
  • Author(s): 入月俊明・光部実希・大串健一・川幡穂高・木元克典
  • Organizer: 日本古生物学会2015年年会
  • Place of Presentation: 産業技術総合研究所（茨城県つくば市）
  • Year and Date: 2015-06-28
• [Presentation] 地球温暖化を検証するための汽水湖の長期調査の試み (2015)
  • Author(s): 野村律夫
  • Organizer: 日本古生物学会2015年年会
  • Place of Presentation: 産業技術総合研究所（茨城県つくば市）
  • Year and Date: 2015-06-28
• [Presentation] 静岡県西部太田川低地における完新世の貝形虫群集と古環境変化 (2015)
  • Author(s): 藤原勇樹・入月俊明・藤原治
  • Organizer: 日本古生物学会2015年年会
  • Place of Presentation: 産業技術総合研究所（茨城県つくば市）
  • Year and Date: 2015-06-27
• [Presentation] 瀬戸内海播磨灘北部における過去2400年間の貝形虫群集の変化 (2015)
  • Author(s): 米光亮貴・入月俊明・瀬戸浩二
  • Organizer: 日本古生物学会2015年年会
  • Place of Presentation: 産業技術総合研究所（茨城県つくば市）
  • Year and Date: 2015-06-27
• [Presentation] 松江市美保関町の下部中新統古浦層上部から産出した化石群集 (2015)
  • Author(s): 西村友志・矢部淳・入月俊明・河野重範・松原尚志
  • Organizer: 日本古生物学会2015年年会
  • Place of Presentation: 産業技術総合研究所（茨城県つくば市）
  • Year and Date: 2015-06-27
• [Presentation] 堆積速度の変化と石灰質有孔虫殻の溶解 (2015)
  • Author(s): 野村律夫・辻本 彰
  • Organizer: 日本古生物学会第164回例会
  • Place of Presentation: 豊橋市自然史博物館
  • Year and Date: 2015-01-31
• [Presentation] ラジウム・トリウム放射能比からみた中海の湖水の動き (2015)
  • Author(s): 岡野 舞・野村律夫・辻本彰
  • Organizer: 島根大学研究機構汽水域研究センター第21回新春恒例汽水域研究発表会 汽水域研究会第2回例会 合同研究発表会
  • Place of Presentation: 島根県県民会館
  • Year and Date: 2015-01-10
• [Presentation] Relationship between diatom thanatocoenoses and anthropogenically-induced environmental changes in the Seto Inland Sea, Japan (2014)
  • Author(s): Yoshioka, K., Hirose, K., Sako, M., Irizuki, T.
  • Organizer: AGU fall meeting
  • Place of Presentation: San Francisco (U.S.A.)
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] 宮城県松島湾中央部と東部で採取した2011年東北沖津波堆積物中の珪藻遺骸群集の変化 (2014)
  • Author(s): 吉岡 薫・入月俊明・白山正太・鈴木 淳・田中裕一郎・長尾正之・藤原 治・河潟俊吾・河野重範・西村 修・佐々木久雄
  • Organizer: 日本地質学会第121年学術大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2014-09-15
• [Presentation] 汽水域における224Ra/228Ra比の分布特性と宍道湖の湖水の動き (2014)
  • Author(s): 野村律夫・井上睦夫・小藤久毅
  • Organizer: 日本地質学会第121年学術大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2014-09-14
• [Presentation] 猪苗代湖ボーリングコア(INW2012)からみた 過去1700年間の珪藻群集変化 (2014)
  • Author(s): 廣瀬孝太郎・後藤敏一・長橋良隆
  • Organizer: 日本地質学会第121年学術大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2014-09-13 – 2014-09-15
• [Presentation] 大阪湾における珪藻群集の時空間分布と完新世の環境変化 (2014)
  • Author(s): 廣瀬孝太郎・後藤敏一・安原盛明・三田村宗樹・ 吉川周作
  • Organizer: 日本第四紀学会2014年大会
  • Place of Presentation: 東京大学
  • Year and Date: 2014-09-05 – 2014-09-09
• [Presentation] 密度流拡散装置の影響評価を目的とした設置水域外からの有孔虫分析 (2014)
  • Author(s): 野村律夫・辻本彰・福田賢一
  • Organizer: 日本古生物学会2014年年会
  • Place of Presentation: 九州大学総合研究博物館
  • Year and Date: 2014-06-29
• [Presentation] 中新世における中国地方の貝形虫群集の変遷 (2014)
  • Author(s): 入月俊明・月俣馨介・松浦康隆・後藤隆嗣・岩谷北斗・河野重範
  • Organizer: 日本古生物学会2014年年会
  • Place of Presentation: 九州大学総合研究博物館
  • Year and Date: 2014-06-28
• [Presentation] 浅海性貝形虫Cytheropteron属を用いた海水温の定量的復元 (2014)
  • Author(s): 山田 桂・後藤隆嗣・入月俊明
  • Organizer: 日本古生物学会2014年年会
  • Place of Presentation: 九州大学総合研究博物館
  • Year and Date: 2014-06-28
• [Presentation] 猪苗代湖ボーリングコア(INW2012)の岩相層序と過去約2000年間の珪藻群集変化 (2014)
  • Author(s): 廣瀬孝太郎・長橋良隆
  • Organizer: 地球惑星連合大会2014
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 完新世における西日本沿岸域の珪藻化石群集~自然環境変化と人為的改変~ (2014)
  • Author(s): 廣瀬孝太郎
  • Organizer: 日本珪藻学会第35回大会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2014-04-26 – 2014-04-27
• [Presentation] 大阪平野のボーリングコアからみた完新世古の古地理発達と微化石群集変化 (2014)
  • Author(s): 廣瀬孝太郎・入月俊明・三田村宗樹
  • Organizer: 2014年度地団研福島支部会
  • Place of Presentation: 福島大学
  • Year and Date: 2014-04-12
• [Presentation] Temporal variations of ostracods, diatoms, and environmental factors over the past several hundred years in the Seto Inland Sea, Japan-with relation to anthropogenic influence
  • Author(s): Irizuki, T., Yoshioka, K., Sako, M., Yasuhara, M., Hirose, K.
  • Organizer: 17th International Symposium on Ostracoda
  • Place of Presentation: Rome Tre University
• [Presentation] 瀬戸内海のコア試料分析に基づく最近の環境と生物変化
  • Author(s): 入月俊明・吉岡 薫・廣瀬孝太郎・河野重範・野村律夫
  • Organizer: 地学団体研究会第67回総会
  • Place of Presentation: 島根大学
• [Presentation] ボーリングコアからみた完新世の古環境変化と大阪平野の発達史
  • Author(s): 廣瀬孝太郎・入月俊明・三田村 宗樹・吉川周作
  • Organizer: 地学団体研究会第67回総会
  • Place of Presentation: 島根大学