2009 Fiscal Year Final Research Report
Patterns of sediment production and outflow required for creation and maintenance of stream habitat structure
| Project/Area Number |
19360224
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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 |
水工水理学
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKEMON Yasuhiro Kyoto University, 防災研究所, 准教授 (50222104)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Masaharu 京都大学, 防災研究所, 教授 (60181369)
SUMI Tetsuya 京都大学, 防災研究所, 教授 (40311732)
MUTO Yasunori 京都大学, 防災研究所, 准教授 (40263157)
TSUTSUMI Daizo 京都大学, 防災研究所, 准教授 (40372552)
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| Co-Investigator(Renkei-kenkyūsha) |
AMANO Kunihiko 国土技術政策総合研究所, 環境研究部・河川環境研究室, 室長 (50280714)
KOBAYASHI Sohei 独立行政法人土木研究所, 水環境研究グループ, 専門研究員 (20378920)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 河川生態系 / 生息場構造 / 土砂動態 / 土砂生産 / 河床地形 / 砂州 / 流下粒状有機物 / 底生動物群集 |
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| Research Abstract |
Relations of habitat structure and benthic invertebrate community structure to the amount of sediment production and outflow were studied in a set of mountain streams different in histories of deforestation and debris flow. Microhabitat diversity showed the maximum values in a specific period after the last deforestation and/or the last debris flow. Coverage of moss mat on substrates and ratio of exposed stones to partially buried stones could be explained by combined factors of sediment production and the riverbed width. Furthermore, we found that development of sandy bar structure enhanced the trapping efficiency of suspended particulate organic matter (SPOM) by the field observation in the tailwater reaches of dam reservoir and by the laboratory experiment using pine pollens as an SPOM tracer.
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[Journal Article] Nitrogen-stable isotopic signatures of basal food items, primary consumers and omnivores in rivers with different levels of human impact.2009
Author(s)
Kohzu A, Tayasu I, Yoshimizu C, Maruyama A, KohmatsuY, Hyodo F, Onoda Y, Igeta A, Matsui K, Nakano T, Wada E, Nagata T, Takemon Y
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Journal Title
Ecological Research Vol.24
Pages: 127-136
Peer Reviewed
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