2012 Fiscal Year Final Research Report
Hypoxia-induced mobilization of trace elements and its potential effect on aquatic ecosystem
| Project/Area Number |
22681001
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Ehime University |
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Principal Investigator |
ITAI Takaaki 愛媛大学, 沿岸環境科学研究センター, 講師 (60554467)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 水圏 / 貧酸素化 / マンガン / ヒ素 / 生態影響 |
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| Research Abstract |
The aim of this project is to evaluate ecotoxicological effect of hypoxia-induced mobilization of trace elements from lake/marine sediment. To test this effect, I made field surveys, mainly in the Lake Biwa, coupled with laboratory experiments. The results indicated that (i) mass mortality of an endemic goby fish (isaza) in 2007 could be induced by exposure to Mn and As mobilized from lake sediment, (ii) Mn and As have been accumulated in the thin surface of sediment, and thichness of this enrichment layer is decreasing due to progressive hypoxia. Increasing dissolution flux of Mn and As from sediment can be a cause of adverse effect to lake organism. These result also suggested that similar phenomena is of concerned in other hypoxic water environment in the world.
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[Journal Article] Hypoxia-induced exposure of the isaza fish to manganese and arsenic in the bottom of Lake Biwa2012
Author(s)
Itai, T., Hayase, D., Hyobu, Y., Hirata S., Kumagai, M., Tanabe, S
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Journal Title
Japan -Experimental and geochemical verification. Environmental Science &Technology
Volume: 46
Pages: 5789-5797
Peer Reviewed
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[Journal Article] Apparent increase in Mn and As accumulation in the surface of lake sediment from 1977 to 2009 in Lake Biwa2012
Author(s)
Itai, T., Kumagai, M., Hyobu, Y., Hayase, D., Horai, S., Kuwae, M., Tanabe, S
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Journal Title
Japan. Geochemical Journal
Volume: 46
Pages: e47-e52
Peer Reviewed
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[Journal Article] Arsenic and Mn levels in Isaza (Gymnogobius isaza) during the mass mortality event in Lake Biwa2011
Author(s)
Hirata, S. H., Hayase, D., Eguchi, A., Itai, T., Nomiyama, K., Isobe, T., Agusa, T., Ishikawa, T., Kumagai, M. and Tanabe, S.
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Journal Title
Japan. Environmental Pollution
Volume: 159
Pages: 2789-2796
Peer Reviewed
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[Presentation] Exposure of goby fish to manganese and arsenic mobilized from sediment in Lake Biwa under hypoxia2012
Author(s)
Itai, T., Hayase, D., Hyobu, Y., Horai, S., Kumagai, M. and Tanabe, S
Organizer
The 4th International Congress on Arsenic in the Environment
Place of Presentation
Cairns, Australia
Year and Date
2012-07-25
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[Presentation] Change in enrichments of manganese and arsenic in the surface of sediment from 1976 to 2009 in Lake Biwa2012
Author(s)
Itai, T., Kumagai, M., Hyobu, Y., Kuwae, M. and Tanabe, S.
Organizer
Japan, 2012 ASLO Aquatic Science Meeting
Place of Presentation
Otsu, Japan, Program Book
Year and Date
2012-07-08
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[Presentation] Evaluation of Mn and As exposure of a goby fish (Gymnogobius isaza) in the bottom of hypoxic lake -analytical and experimental approaches2011
Author(s)
Itai, T., Hayase, D., Hyobu, Y., Hirata, S. H., Kumagai, M. and Tanabe, S
Organizer
Evaluation of Mn and As exposure of a goby fish (Gymnogobius isaza) in the bottom of hypoxic lake -analytical and experimental approaches
Place of Presentation
Boston, Massachusetts, USA, Abstract Book
Year and Date
2011-11-16
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[Presentation] Manganese and arsenic exposure to a goby fish in Lake Biwa - Importance of simultaneous speciation in biota and surrounding environmental media2011
Author(s)
Itai, T., Hayase, D., Hyobu, Y., Kumagai, M. and Tanabe, S
Organizer
The 6th Global COE International Symposium on Advanced Studies by Young Scientists on Environmental Pollution and Ecotoxicology
Place of Presentation
Matsuyama, Japan, Abstract Book
Year and Date
2011-08-05
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[Presentation] Manganese and Arsenic Exposure to Fish in Lake Biwa - Importance of Simultaneous Speciation in Biota and Surrounding Environmental Media2011
Author(s)
Itai, T., Hayase, D., Hyobu, Y., Horai, S., Kumagai, M. and Tanabe, S
Organizer
The third International Symposium on Metallomics
Place of Presentation
Munster, Germany, June, Abstracts
Year and Date
2011-06-16
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