Implication to the sediment acidification in brackish water due to the change of sedimentation rate, and its improvement
| Project/Area Number |
25287138
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Shimane University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
入月 俊明 島根大学, 総合理工学研究科(研究院), 教授 (60262937)
井上 睦夫 金沢大学, 環日本海域環境研究センター, 准教授 (60283090)
辻本 彰 島根大学, 教育学部, 講師 (60570554)
林 広樹 島根大学, 総合理工学研究科(研究院), 准教授 (80399360)
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| Research Collaborator |
TAKATA Hiroyuki 釜山国立大学, 海洋学部, 研究員
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Keywords | 酸性化 / 汽水域 / 堆積速度 / 水循環 / 有機物負荷 / アンスロポシーン / 沿岸水の動態 / 地質学 / 層位・古生物学 / 環境変動 / 汽水域環境 / 沿岸汽水域 / 富栄養化 |
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| Outline of Final Research Achievements |
In order to clarify the acidification of brackish water, we carried out the measurements of sedimentation rate and dissolution of the meiobenthic calcareous foraminiferal tests in brackish lakes Shinjiko and Nakaumi. By using Pb-210 and Cs-137 methods, it was clarified that sedimentation rates and the processes are different in each side of the western and eastern Shinjiko. The change of sedimentation rate of organic matter occurred in the 1970's-80's in both lakes, and the decrease of Ra-226 transported by river from land occurred in the 1950's-60's. Dissolution of calcareous tests of foraminifera was distinct in lowered salinity. We confirmed that the dissolution of calcareous tests occurred in the high sedimentation and the high decomposition rates of organic matters, but the dissolution was buffered by marine water.
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Report
(5 results)
Research Products
(64 results)
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[Journal Article] Simple 40K removal by acidified water leaching for estimating low levels of radiocesium in fishery products following Fukushima Dai-ichi Nuclear Power Plant accident.2017
Author(s)
Inoue, M., Yamashita, S., Fujimoto, K., Kofuji, H., Miki, S. and Nagao, S.
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Journal Title
Applied Radiation and Isotopes
Volume: １２０
Pages: 17-21
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Centennial-scale East Asian summer monsoon intensity based on d18O values in ostracode shells and its relationship to land-ocean air temperature gradients over the last 1700 years2016
Author(s)
Yamada, K., Masuma, T., Sakai, S., Seto, K., Ogusa, H., Irizuki, T.
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Journal Title
Geology
Volume: 44
Pages: 255-258
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[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. and Ikehara, M.
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Journal Title
Quaternary Science Reviews
Volume: 140
Pages: 67-74
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Foraminiferal record of the 2010-2011 Canterbury earthquake sequence, New Zealand, and its predecessors.2015
Author(s)
Hayward,B. W., Sabaa A. T., Figueira, B., Reid, C. M., Nomura, R.
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology
Volume: 438
Pages: 213-225
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[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.
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Journal Title
Micropaleontology
Volume: 61
Pages: 177-184
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Vertical profiles of 228Ra and 226Ra activities in the Sea of Japan and their implications on water circulation.2015
Author(s)
Inoue, M., Minakawa, M., Yoshida, K., Nakano, Y., Kofuji, H., Nagao, S., Hamajima, Y. and Yamamoto, M.
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Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Volume: 303
Pages: 1309-1312
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Lateral and temporal variations in Fukushima DNPP-derived 134Cs and 137Cs in marine sediments in/around the Sado Basin, Sea of Japan.2015
Author(s)
Inoue, M., Yoneoka, S., Ochiai, S., Oikawa, S., Fujimoto, K., Yagi, Y., Honda, N., Nagao, S., Yamamoto, M., Hamajima, Y., Murakami, T., Kofuji, H. and Misonoo, J.
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Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Volume: 303
Pages: 1313-1316
Related Report
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[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.
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Journal Title
Zootaxa
Volume: 3919
Pages: 306-326
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[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.
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Journal Title
Marine Pollution Bulletin
Volume: 51
Pages: 149-159
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[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
International Union for Quaternary Research, XIX Congress (INQUA Congress 2015)
Place of Presentation
名古屋国際会議場（名古屋市）
Year and Date
2015-08-01
Related Report
Int'l Joint Research
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[Presentation] Migration pattern of the Tsushima Warm Current within/around the Sea of Japan: Implications from transport of 228Ra.2015
Author(s)
Inoue, M., Shirotani, Y., Furusawa, Y., Fujimoto, K., Kofuji, H., Yoshida, K., Nagao, S., Yamamoto, M., Hamajima, Y., Honda, N., Minakawa, M., Shiomoto, A., Isoda, Y., Hayakawa, K.
Organizer
18th Pacific-Asian Marginal Seas Meeting
Place of Presentation
Naha, Okinawa
Year and Date
2015-04-21
Related Report
Int'l Joint Research
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