Catchment-scale effects of river fragmentation : A case study on restoring connectivity
Copyright © 2020 Elsevier Ltd. All rights reserved..
More than two thirds of large rivers worldwide are fragmented, threatening freshwater biodiversity, river integrity, and the services that freshwater ecosystems provide for human populations around the globe. In an effort to alleviate the impacts of barriers, engineered solutions have been developed, though with somewhat underwhelming results. River restoration, especially dam removal, is viewed as the optimal option though seldom the go-to approach. In this study, we evaluated the effects of a large restoration project (pseudo dam removal) in River Kolding, Southern Jutland, Denmark, via a before-after-control-impact (BACI) approach. Using a large dataset of electrofishing data from 74 sites (including downstream unaffected sites, reconnected sites and upstream regulated sites), we found that habitat connectivity was restored successfully, with a large increase in young-of-the-year brown trout (Salmo trutta) at reconnected sites, reaching similar densities to downstream (non-affected) sites. We further observed a decrease in length at reconnected sites, suggesting that natural spawning and rearing habitats were successfully restored too.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:264 |
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| Enthalten in: |
Journal of environmental management - 264(2020) vom: 15. Juni, Seite 110408 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Birnie-Gauvin, Kim [VerfasserIn] |
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| Links: |
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| Themen: |
Fish passage |
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| Anmerkungen: |
Date Completed 06.05.2020 Date Revised 06.05.2020 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jenvman.2020.110408 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM308031474 |
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| 500 | |a Date Revised 06.05.2020 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2020 Elsevier Ltd. All rights reserved. | ||
| 520 | |a More than two thirds of large rivers worldwide are fragmented, threatening freshwater biodiversity, river integrity, and the services that freshwater ecosystems provide for human populations around the globe. In an effort to alleviate the impacts of barriers, engineered solutions have been developed, though with somewhat underwhelming results. River restoration, especially dam removal, is viewed as the optimal option though seldom the go-to approach. In this study, we evaluated the effects of a large restoration project (pseudo dam removal) in River Kolding, Southern Jutland, Denmark, via a before-after-control-impact (BACI) approach. Using a large dataset of electrofishing data from 74 sites (including downstream unaffected sites, reconnected sites and upstream regulated sites), we found that habitat connectivity was restored successfully, with a large increase in young-of-the-year brown trout (Salmo trutta) at reconnected sites, reaching similar densities to downstream (non-affected) sites. We further observed a decrease in length at reconnected sites, suggesting that natural spawning and rearing habitats were successfully restored too | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Fish passage | |
| 650 | 4 | |a Fragmentation | |
| 650 | 4 | |a Hydropower | |
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| 650 | 4 | |a Restoration | |
| 650 | 4 | |a Salmo trutta | |
| 700 | 1 | |a Nielsen, Jan |e verfasserin |4 aut | |
| 700 | 1 | |a Frandsen, Sten Bøgild |e verfasserin |4 aut | |
| 700 | 1 | |a Olsen, Hans-Martin |e verfasserin |4 aut | |
| 700 | 1 | |a Aarestrup, Kim |e verfasserin |4 aut | |
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