The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus
Interactions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated dipper in a Norwegian river. Acidic precipitation led to the extinction of salmon,...
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2018
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Online Access: | http://hdl.handle.net/11250/2494674 https://doi.org/10.1002/ece3.3958 |
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ftninstnf:oai:brage.nina.no:11250/2494674 2024-06-23T07:51:21+00:00 The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus Nilsson, Anna L'Abee-Lund, Jan Henning Vøllestad, Leif Asbjørn Jerstad, Kurt Larsen, Bjørn Mejdell Røstad, Ole Wiggo Saltveit, Svein Jakob Skaugen, Thomas Stenseth, Nils Christian Walseng, Bjørn 2018 application/pdf http://hdl.handle.net/11250/2494674 https://doi.org/10.1002/ece3.3958 eng eng Andre: Norwegian Water Resources and Energy Directorate Norges forskningsråd: 221393 urn:issn:2045-7758 http://hdl.handle.net/11250/2494674 https://doi.org/10.1002/ece3.3958 cristin:1578980 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Ecology and Evolution birds breeding predators river salmonids VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf https://doi.org/10.1002/ece3.3958 2024-06-07T03:57:56Z Interactions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated dipper in a Norwegian river. Acidic precipitation led to the extinction of salmon, but salmon recolonized after liming was initiated in 1991. We compared the dipper population size and reproductive output before (1978–1992) and after (1993–2014) salmon recolonization. Despite a rapid and substantial increase in juvenile salmon, the breeding dipper population size and reproductive output were not influenced by juvenile salmon, trout, or total salmonid density. This might be due to different feeding strategies in salmonids and dippers, where salmonids are mainly feeding on drift, while the dipper is a benthic feeder. The correlation between the size of the dipper population upstream and downstream of a salmonid migratory barrier was similar before and after recolonization, indicating that the downstream territories were not less attractive after the recolonization of salmon. Upstream dipper breeding success rates declined before the recolonization event and increased after, indicating improved water quality due to liming, and increasing invertebrate prey abundances and biodiversity. Surprisingly, upstream the migratory barrier, juvenile trout had a weak positive effect on the dipper population size, indicating that dippers may prey upon small trout. It is possible that wider downstream reaches might have higher abundances of alternative food, rending juvenile trout unimportant as prey. Abiotic factors such as winter temperatures and acidic precipitation with subsequent liming, potentially mediated by preyabundance, seem to play the most important role in the life history of the dipper. birds, breeding, predators, river, salmonids publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Norwegian Institute for Nature Research: Brage NINA Ecology and Evolution 8 8 4065 4073 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
birds breeding predators river salmonids VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
birds breeding predators river salmonids VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Nilsson, Anna L'Abee-Lund, Jan Henning Vøllestad, Leif Asbjørn Jerstad, Kurt Larsen, Bjørn Mejdell Røstad, Ole Wiggo Saltveit, Svein Jakob Skaugen, Thomas Stenseth, Nils Christian Walseng, Bjørn The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
topic_facet |
birds breeding predators river salmonids VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Interactions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated dipper in a Norwegian river. Acidic precipitation led to the extinction of salmon, but salmon recolonized after liming was initiated in 1991. We compared the dipper population size and reproductive output before (1978–1992) and after (1993–2014) salmon recolonization. Despite a rapid and substantial increase in juvenile salmon, the breeding dipper population size and reproductive output were not influenced by juvenile salmon, trout, or total salmonid density. This might be due to different feeding strategies in salmonids and dippers, where salmonids are mainly feeding on drift, while the dipper is a benthic feeder. The correlation between the size of the dipper population upstream and downstream of a salmonid migratory barrier was similar before and after recolonization, indicating that the downstream territories were not less attractive after the recolonization of salmon. Upstream dipper breeding success rates declined before the recolonization event and increased after, indicating improved water quality due to liming, and increasing invertebrate prey abundances and biodiversity. Surprisingly, upstream the migratory barrier, juvenile trout had a weak positive effect on the dipper population size, indicating that dippers may prey upon small trout. It is possible that wider downstream reaches might have higher abundances of alternative food, rending juvenile trout unimportant as prey. Abiotic factors such as winter temperatures and acidic precipitation with subsequent liming, potentially mediated by preyabundance, seem to play the most important role in the life history of the dipper. birds, breeding, predators, river, salmonids publishedVersion |
format |
Article in Journal/Newspaper |
author |
Nilsson, Anna L'Abee-Lund, Jan Henning Vøllestad, Leif Asbjørn Jerstad, Kurt Larsen, Bjørn Mejdell Røstad, Ole Wiggo Saltveit, Svein Jakob Skaugen, Thomas Stenseth, Nils Christian Walseng, Bjørn |
author_facet |
Nilsson, Anna L'Abee-Lund, Jan Henning Vøllestad, Leif Asbjørn Jerstad, Kurt Larsen, Bjørn Mejdell Røstad, Ole Wiggo Saltveit, Svein Jakob Skaugen, Thomas Stenseth, Nils Christian Walseng, Bjørn |
author_sort |
Nilsson, Anna |
title |
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
title_short |
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
title_full |
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
title_fullStr |
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
title_full_unstemmed |
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus |
title_sort |
potential influence of atlantic salmon salmo salar and brown trout salmo trutta on density and breeding of the white-throated dipper cinclus cinclus |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2494674 https://doi.org/10.1002/ece3.3958 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology and Evolution |
op_relation |
Andre: Norwegian Water Resources and Energy Directorate Norges forskningsråd: 221393 urn:issn:2045-7758 http://hdl.handle.net/11250/2494674 https://doi.org/10.1002/ece3.3958 cristin:1578980 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_doi |
https://doi.org/10.1002/ece3.3958 |
container_title |
Ecology and Evolution |
container_volume |
8 |
container_issue |
8 |
container_start_page |
4065 |
op_container_end_page |
4073 |
_version_ |
1802642431260229632 |