The impact on the environment and ecosystem of the inner part of Ariake Bay caused by the changes of the tidal current in Isahaya Bay
| Project/Area Number |
25281031
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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 |
Environmental impact assessment
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| Research Institution | Prefectural University of Kumamoto |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MONTANI Shigeru 北海道大学, 大学院環境科学院, 教授 (30136288)
ICHINOMIYA Mutsuo 熊本県立大学, 環境共生学部, 准教授 (30601918)
KOMORITA Tomohiro 熊本県立大学, 環境共生学部, 講師 (10554470)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Keywords | 有明海 / 諫早湾 / 潮流 / 赤潮 / 海底環境 / 堆積物 / 泥分 / 底生生物群集 / 貧酸素水 / 有明海奥部海域 / 成層構造 / 海底生態系 / 環境変動 / 海洋生態 / 海洋構造 / 環境影響評価 / 八代海 |
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| Outline of Final Research Achievements |
The benthic environment and ecosystem in the inner part of Ariake bay was assessed, and the decrease of the mud content of the sediment on the mud bottom in the western side of the bay and the increase of the mud content of the sediment on the sandy bottom in the eastern side of the bay were found by the assessments. These facts indicate that asymmetric velocity of the tidal current between the western and eastern sides of the bay was markedly changed in the past two decades in the bay, which was the one of the most important mechanisms to control the increase of phytoplankton in the water. We deduced that these changes were mainly caused by the decline of the intrusion of the tidal current to the innermost areas of Isahaya Bay at the flood tide with the results of this study.
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Report
(4 results)
Research Products
(23 results)
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[Journal Article] Short-term dynamics of cyanobacterial toxins (microcystins) following a discharge from a coastal reservoir in Isahaya Bay, Japan.2015
Author(s)
Umehara, A., Komorita, T., Tai, A., Takahashi, T, Orita, R., Tsutsumi, H.
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Journal Title
Marine Pollution Bulletin
Volume: 92(1-2)
Pages: 73-79
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Historical occurrence of the short-neck clam, Ruditapes philippinarum (Adams & Reeve, 1850), on the sandy flats of Ariake Bay, Kyushu, western Japan2015
Author(s)
S.Shimoyama1, T.Ichihara, K.Tsukano,M.Kabashima,N.Momoshima, T.Komorita, H.Tsutsumi
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Journal Title
Plankton and Benthos Research
Volume: 10
Pages: 202-214
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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