ダウンロード数: 121
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
a56b0p74.pdf | 623.49 kB | Adobe PDF | 見る/開く |
タイトル: | Influence of Point Environmental Conditions to the Present Species Richness of Fish and Mussel of Floodplain Pools in the Kizu river |
著者: | CHOI, Mikyoung TAKEMON, Yasuhiro IKEDA, Kinko NISHII, Kazuhiro SUMI, Tetsuya |
キーワード: | bitterling mussel alien fish species richness habitat conditions |
発行日: | Sep-2013 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. B |
巻: | 56 |
号: | B |
開始ページ: | 713 |
終了ページ: | 718 |
抄録: | The Kizu River ecosystem is characterized by lentic habitats such as pools or wando on the floodplain, providing habitats to Acheilognathus bitterlings and freshwater unionid mussels. In the last decade, however, these habitats have been degraded by the decrease in peak discharge and flood frequency and excessive vegetation expansion on the floodplain. In order to restore the suitable habitat structure for the Kizu River ecosystem, it is needed to find out relations of habitat condition required for bitterlings and mussels. We used principal component analysis (PCA) and generalized linear model (GLM) based on selected data by correlation analysis. Species richness of Bitterling was best explained by a model consist of location, age, transparency, mean grain size and DO one year ago. Species richness of mussel was best explained by a model consist of flooding frequency and depth of mud two years ago. Species richness of resident fish was best explained by low relative height, age, area and vegetation coverage and species richness of alien fish was explained by model consist of low relative, area, vegetation coverage and DO. Species richness of resident fish and alien fish were significantly correlated with habitat conditions of current year. The results indicate a range of habitat age for maintenance of fish and mussel diversity including more than two years old, is required in the Kizu River. |
URI: | http://hdl.handle.net/2433/181497 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html |
出現コレクション: | Vol.56 B |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。