| Project/Area Number |
18510026
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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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 National Institute for Environmental Studies, 生物圏環境研究領域, 研究員 (50300851)
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| Co-Investigator(Kenkyū-buntansha) |
ISHII Yuichi 独立行政法人国立環境研究所, 生物圏環境研究領域, NIESポスドクフェロー (80551027)
AMANO Yoshimasa 千葉大学, 工学部, 助教 (40517976)
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| Project Period (FY) |
2006 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,210,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | ヨシ原 / 沿岸微地形 / HGMアプローチ / 水位 / 栄養塩環境 / 地下水位 |
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| Research Abstract |
The field survey in the coastal wetland of Lake Kasumigaura and the experimental farm of NIES (National Institute for Environmental Studies) for the verification that the microtopographic features of the coastal wetlands, such as ground levels and the arrangement of fairways in the wetland, have large influences on the water and nutrients supply to the reed beds, and the geomorphic features of the coastal wetlands, such as cape or bay, have a large influence on the disturbance strength to the wetlands and the decision of reed bed size in the present lake coastal ecosystems, which the water level is controlled artificially. As a result, (I) lake water is mainly supplied into the reed bed by the overflow from the littoral water. (II) Phragmites plants grew rapidly in the habitat where is supplied high-nutrient water, by the overflow at the lake sides and the fairway sides. (III) Phragmites plants grew larger in the flood condition than at the emergent as long as there is no physical disturbance, and another species in the flood is fewer, therefore the beds can form the more dense and pure population. (IV) In the geographical scale of 4km or more, the shelter effects of the bay regulate the coastal vegetation size. Therefore, it was considered that the hydrogeomorphic classification based on the microtopographic and geomorphic features of coastal wetlands was effective for Phragmites plants growth and the assessment of the reed beds.
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