書誌事項
- タイトル別名
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- シベツガワ カリュウイキ デ オコナッタ シケンテキ ナ カワ ノ サイダコウカ ニ トモナウ ギョルイ ト セイソク カンキョウ ノ ヘンカ
- 再蛇行化に伴う魚類の応答
- Effects of a re-meandering project on the physical habitats and fish in the Shibetsu River
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抄録
We investigated effects of experimental channel re-meandering on river ecosystem in lower reaches of the Shibetsu River, Hokkaido, northern Japan. Field samplings before and after re-meandering were conducted to compare fish species abundance and physical conditions of instream habitat to those in a straightened main channel (control reach). The reach used for re-meandering, an isolated old channel of the river, had been a stagnant lentic zone. Physical conditions in the past channel therefore were extremely different from those in control reach. Whereas a large number of lentic fish and crustaceans were found in past channel, only a few lotic fish were found in control reach. After re-meandering, physical conditions of past channel were dramatically changed and showed similar depth and velocity distributions to those in control reach. Re-meandering also greatly lowered lentic fish abundance. On the other hand, many masu salmon were also found in re-meandering reach. We recorded large-sized salmonids at a concave part of re-meandering reach, which were not found in control reach. The channel re-meandering improved its planar geometries and successfully restored diverse instream habitats complex in longitudinal and cross sectional structure. However, unlike past channel, limited availability of slow-flow habitats in re-meandering reach hindered lentic species to colonize.
収録刊行物
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- 応用生態工学
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応用生態工学 7 (2), 187-199, 2005-01-30
応用生態工学会
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詳細情報 詳細情報について
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- CRID
- 1050294872217619584
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- NII論文ID
- 10021977223
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- NII書誌ID
- AA11528360
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- ISSN
- 13443755
- 18825974
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- NDL書誌ID
- 7254462
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- NDL
- CiNii Articles
- KAKEN
