2015 Fiscal Year Final Research Report
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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| Keywords | 有明海 / 諫早湾 / 潮流 / 赤潮 / 海底環境 / 堆積物 / 泥分 |
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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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| Free Research Field |
海洋生態学
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