| Project/Area Number |
17H02034
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Nanzan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
渡辺 信 琉球大学, 熱帯生物圏研究センター, 准教授 (10396608)
小野 賢二 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (30353634)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Keywords | マングローブ林 / 海面上昇 / 表層侵食 / 土砂フラックス / マングローブ泥炭 |
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| Outline of Final Research Achievements |
To clarify the effects of sea-level rise on mangrove ecosystems at the community level and to make future projections, we conducted field research on Pohnpei Island, Federated States of Micronesia, where sea-level rise has been pronounced in a humid tropics, and on Iriomote Island, a subtropics where sea-level rise has been comparable to the global mean. The results indicated that in the Bruguiera gymnorrhiza community, where the density of Rhizophora species has decreased, erosion on the forest floor and increased flux during flooding and drainage may cause sediment discharge, resulting in annual erosion on the order of several centimeters per 10 cm of sea level rise. On the other hand, it was confirmed that the Rhizophora community can maintain its location by accumulating mangrove peat in response to a sea-level rise of 5 to 8 mm per year.
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| Academic Significance and Societal Importance of the Research Achievements |
マングローブ生態系における海面上昇の影響実態を明らかにすることで、その危険性に対して改めて警鐘を鳴らすと共に、その影響を群落レベルで評価することにより、熱帯・亜熱帯地域における海面上昇下での沿岸環境保全策を構築するにあたって、マングローブ林保全や植林を活用する際の科学的根拠を与えることができる。
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