| Item type |
文献 / Documents(1) |
| 公開日 |
2021-09-08 |
| アクセス権 |
|
|
アクセス権 |
open access |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版社版DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3390/w12123357 |
|
|
言語 |
ja |
|
|
関連名称 |
10.3390/w12123357 |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
|
|
タイトル |
Time Series Changes in Fish Assemblages and Habitat Structures Caused by Partial Check Dam Removal |
|
言語 |
en |
| 著者 |
ナガヤマ, シゲヤ
イシヤマ, ノブオ
セノ, タロウ
カワイ, ヒデユキ
河口, 洋一
ナカノ, ダイスケ
ナカムラ, フトシ
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Despite a steep increase in dam removal projects, there are few studies on the biophysical responses to dam removal. In this study, we evaluated the short-term (1.5 years) and long-term (5.5 years) effects of partial check dam removal on fish assemblages and their habitats. First, the habitat preferences of fish were examined at a channel unit scale: pools, rapids, and side channels satisfied the seasonal habitat requirements of the fish assemblages. Partial check dam removal increased the abundance of these habitats and diversified the habitat structures owing to the sediment release from the dam; in contrast, the bedrock distinctly decreased 1.5 years after dam removal. However, 5.5 years after dam removal, the bedrock proportion increased, and the habitat structures were simplified again owing to the re-transportation of sediments. Similar temporal changes were also determined through a reach-scale analysis with a change in the bed materials. Anadromous Oncorhynchus masou began to spawn and recolonize in the upstream section of the dam after the dam removal, causing similar assemblage compositions between the downstream and upstream sections. The abundance of Salvelinus malma and Noemacheilus barbatulus toni in the upstream reaches decreased over time after the dam removal. The temporal changes in the biophysical responses suggest that long-term monitoring is indispensable for the reliable evaluation of dam removal effects. |
|
言語 |
en |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
bedrock outcrop |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
ecological trade-off |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
habitat preference |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
long-term monitoring |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
sediment transportation |
| 書誌情報 |
en : Water
巻 12,
号 12,
p. 3357,
発行日 2020-11-30
|
| 収録物ID |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
20734441 |
| 出版者 |
|
|
出版者 |
MDPI |
|
言語 |
en |
| 権利情報 |
|
|
言語 |
en |
|
権利情報 |
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
| EID |
|
|
識別子 |
372598 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
water_12_12_3357.pdf (5.03 MB)
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