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The significance of meandering channel to habitat diversity and fish assemblage: a case study in the Shibetsu River, northern Japan
| Title: | The significance of meandering channel to habitat diversity and fish assemblage: a case study in the Shibetsu River, northern Japan |
| Authors: | Nagayama, Shigeya Browse this author | | Nakamura, Futoshi Browse this author →KAKEN DB |
| Keywords: | Channel modification | | Habitat classification | | Lowland river | | Meander restoration | | Sinuous channel |
| Issue Date: | Jan-2018 |
| Publisher: | Springer |
| Journal Title: | Limnology |
| Volume: | 19 |
| Issue: | 1 |
| Start Page: | 7 |
| End Page: | 20 |
| Publisher DOI: | 10.1007/s10201-017-0512-4 |
| Abstract: | This study examined the structure and function of habitats for fish, the contribution to fish populations, and the effects of channel modification on habitats and fish populations in the lowland meandering Shibetsu River, northern Japan. Electrofishing and environmental measurements were conducted in bank areas of habitats constituting natural meandering and modified reaches. All types of habitats in a meandering reach highly contributed to the fish population(s). In particular, the contributions of lateral and wood habitats to fish populations were generally high, despite the low spatial extent of these habitats. The modified reach was simplified and had fewer types of habitats with uniform currents, and there was a low abundance of most fish within these habitats. Abundance of each fish group (taxa) was negatively affected by the changes in the habitats and/or channel shortening (i.e., decrease in the absolute abundance of habitat) due to river modification, which was implemented during 1950-1978. This study suggests that the recovery of all the habitat types is important in meander restoration and that the changes in habitat types and abundance should be examined in monitoring meander restoration and channel shortening. |
| Rights: | © The Japanese Society of Limnology 2017., This is a post-peer-review, pre-copyedit version of an article published in Limnology. The final authenticated version is available online at: https://doi.org/10.1007/s10201-017-0512-4. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/72475 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中村 太士
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