| Project/Area Number |
23510038
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental impact assessment/Environmental policy
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
YABE TOHRU 独立行政法人国立環境研究所, 生物・生態系環境研究センター, 主任研究員 (50300851)
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| Co-Investigator(Kenkyū-buntansha) |
TAMAOKI Masanori 独立行政法人国立環境研究所, 生物・生態系環境研究センター, 主任研究員 (00311324)
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| Research Collaborator |
ISHI Yuichi 公益財団法人東京都環境公社東京都環境科学研究所, 調査研究科, 研究員 (80551027)
NAKAMURA Masako 独立行政法人国立環境研究所, 生物・生態系環境研究センター, リサーチアシスタント
ARITA Koichi 独立行政法人国立環境研究所, 生物・生態系環境研究センター, NIES ポスドクフェロー
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | グリーンタイド / ミナミアオサ / 谷津干潟 / 遺伝子解析 / 侵入種 / 生物量 / 物質収支 / 生態系機能 / 航空写真 |
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| Research Abstract |
In order to evaluate the quantitative effects of the green tide formed by Ulva species on an ecosystem function in the tidal flat, Yatsu tidal lagoon where the green tide developed throughout the year was selected. By applying a newly developed molecular identification method, we found Ulva ohnoi, which is considered as invasive species, is the dominant species in the tidal. Large accumulation of U. ohnoi was observed from spring to early summer, but was sharply declined in midsummer. The biomass was recovered in fall, and reached its maximum in winter. Indoor culture assays showed that relative growth rate at a higher temperature in U. ohnoi was higher than that in native species U. pertusa. Both species did not grow at the water temperature correspond to that in winter. Analyses of surface water reveal that green tide has important ecological functions in nutrients and carbon cycle.
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