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2003 Fiscal Year Final Research Report Summary

The change of the benthic foraminiferal assemblages influenced by a heavy metal pollution

Research Project

Project/Area Number 13640472
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Stratigraphy/Paleontology
Research InstitutionKagoshima University

Principal Investigator

OKI Kimihiko  the Kagoshima University Museum, Professor, 総合研究博物館, 教授 (90041235)

Co-Investigator(Kenkyū-buntansha) HIDAKA Masayasu  Kagoshima University, Faculty of Fisheries, Assistant Professor, 水産学部, 講師 (20208771)
TOMIYASU Takashi  Kagoshima University, Faculty of Science, Associate Professor, 理学部, 助教授 (60217552)
Project Period (FY) 2001 – 2003
Keywordsbenthic foraminifera / heavy metal pollution / bottom surface sediments / inner bay / mercury / Kagoshima Bay / South Yatsushiro Sea / Ariake Sea
Research Abstract

The main purpose of this study is to clarify the relationship between the vertical distributions of benthic foraminiferal assemblages and a heavy metal pollution in the bottom surface sediments (cores) taken from Kagoshima Bay, the South Yatsushiro Sea (include Minamata Bay) and the Ariake Sea. In Kagoshima Bay, we reported that ostracodes was distributed in the sea areas influenced by current, civilization and volcanisms. In the South Yatsushiro Sea, though the oceanographic conditions and sedimentary environments hardly showed difference before and after discharge of mercury-contaminated effluent, the frequency of Bulimina denudata abruptly increased at the horizons showing high mercury contents. This fact suggests that Bulimina denudata is quite within the bounds of possibility for indicator of mercury pollution. But the frequency of Bulimina denudata slightly decreased at the horizons showing more than 3 ppm. These facts are assumed to support the idea that Bulimina denudata does not prefer the bottom sediments showing high mercury contents but tolerates mercury pollution compared with other species. In the Ariake Sea, we carried out the grain size and the mercury analyses in the core samples, and reported the results of them.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 大木公彦 他2名: "水俣湾沖の水銀汚染と底生有孔虫群集の垂直変化"月刊海洋. 33. 414-419 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 江口朋美 他1名: "分別抽出/還元気化冷原子吸光光度法による鹿児島湾及び水俣湾底質中の水銀の化学形評価"分析化学. 51. 859-864 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Bodergat, A.: "Volcanisme, activete anthropique et circulation des masses oceaniques : leur influence respective sur la distribution des populations d'ostracodes dans la baie de Kagoshima"C.R.Geoscience. 334. 1053-1059 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Bodergat, A.: "Currents, civilization, or volcanism? Ostracodes as sentinels in a patchy environment : Kagoshima Bay, Japan"micropaleontology. 48. 285-299 (2002)

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      「研究成果報告書概要(和文)」より
  • [Publications] Rajar, R.: "Application of three-dimensional mercury cycling model to coastal seas"Ecological Modelling. 171. 139-155 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rajar, R. et al.: "Application of three-dimensional mercury cycling model to coastal seas."Ecological Modelling. no.171. 139-155 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Bodergat, A. et al.: "Currents, civilization, or volcanism? Ostracodes as sentinels in a patchy environment : Kagoshima Bay, Japan."micropaleontology. 48(3). 285-299 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Bodergat, A. et al.: "Impact of volcanism, human activities, and water mass circulation on the distribution of ostracod populations in Kagoshima Bay (Kyushu Island, southern Japan)."C.R.Geoscience. 334. 1053-1059 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Eguchi, T. et al.: "The speciation of mercury in sediments from Kagoshima Bay and Minamata Bay, southern Kyushu, Japan, by fractional extraction / cold-vapor AAS (in Japanese)."Bunseki Kagaku. 51(9). 859-864 (2002)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Rajar, R. et al.: "Use of modelling in mercury pollution studies with two case studies : Gulf of Trieste and Yatsushiro Sea."Proc.of the National Institute for Minamata Disease Forum, Minamata, Japan. 123-135 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Oki, K.et al.: "Mercury pollution and vertical change of benthic foraminiferal assemblages off Minamata Bay (in Japanese)."Kaiyo Monthly. 33(6). 414-419 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Oki, K.: "Some problems connected with land reclamation and the excavation of off-shore sand in Kagoshima Bay (in Japanese)."Japan.J.of Benthology. 56. 21-27 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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