| Project/Area Number |
22710014
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Fukui Prefectural University |
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Principal Investigator |
SUGIMOTO Ryo 福井県立大学, 海洋生物資源学部, 助教 (00533316)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 窒素循環 / 安定同位体比 / 河口域 / 硝化 / 脱窒 / 貧酸素水塊 / 沿岸域 / 富栄養化 / 人間活動 / 硝酸態窒素 / アンモニア態窒素 |
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| Research Abstract |
We evaluated the human impact on nitrogen cycle in two contrasting estuarine ecosystems (Yodo River-Osaka Bay and Kita River-Obama Bay) by using stable isotopes. In the Yodo river-Osaka Bay system, not only nitrogen loading from the land but also regenerated nitrogen within the estuary and the bay had a large impact on nitrogen dynamics. Although there was little local anthropogenic nitrogen loading in the Kita River, influence of nitrate deposition from atmosphere was observed in both the river and Obama Bay during winter.
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