Juvenile salmonid populations in a temperate river system track synoptic trends in climate
International audience Widespread decline among Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) over recent decades have been linked to pollution, exploitation and catchment modification, but climate change is increasingly implicated. We used long-term, geographically extensive data fro...
Published in: | Global Change Biology |
---|---|
Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2010
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616/document https://hal.archives-ouvertes.fr/hal-00552616/file/PEER_stage2_10.1111%252Fj.1365-2486.2010.02211.x.pdf https://doi.org/10.1111/j.1365-2486.2010.02211.x |
id |
ftunivnantes:oai:HAL:hal-00552616v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-00552616v1 2023-05-15T15:31:03+02:00 Juvenile salmonid populations in a temperate river system track synoptic trends in climate Clews, Esther Durance, Isabelle Vaughan, Ian Ormerod, Steve School of Biosciences Cardiff Cardiff University Biological Sciences National University of Singapore (NUS) 2010-03-19 https://hal.archives-ouvertes.fr/hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616/document https://hal.archives-ouvertes.fr/hal-00552616/file/PEER_stage2_10.1111%252Fj.1365-2486.2010.02211.x.pdf https://doi.org/10.1111/j.1365-2486.2010.02211.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2010.02211.x hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616/document https://hal.archives-ouvertes.fr/hal-00552616/file/PEER_stage2_10.1111%252Fj.1365-2486.2010.02211.x.pdf doi:10.1111/j.1365-2486.2010.02211.x info:eu-repo/semantics/OpenAccess ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-00552616 Global Change Biology, Wiley, 2010, 16 (12), pp.3271. ⟨10.1111/j.1365-2486.2010.02211.x⟩ Life Sciences info:eu-repo/semantics/article Journal articles 2010 ftunivnantes https://doi.org/10.1111/j.1365-2486.2010.02211.x 2022-09-27T22:48:43Z International audience Widespread decline among Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) over recent decades have been linked to pollution, exploitation and catchment modification, but climate change is increasingly implicated. We used long-term, geographically extensive data from the Welsh River Wye, formerly a major salmon river, to examine whether climatically-mediated effects on juveniles (> 0+) might contribute to population change. Populations of Atlantic salmon and brown trout fell across the Wye catchment respectively by 50% and 67% between 1985 and 2004, but could not be explained by pollution because water quality improved during this time. Stream temperatures, estimated from calibrations against weekly air temperature at 8 sites, increased by 0.5-0.7 °C in summer and 0.7-1.0 °C in winter, with larger tributaries warming more than shaded headwaters. Rates of winter warming were slightly greater after accounting for the effect of the North Atlantic Oscillation (1.1-1.4 °C). However, warming through time was smaller than measured variations among tributaries, and alone was insufficient to explain variations in salmonid density. Instead, population variations were best explained in multi-level mixed models by a synoptic variate representing a trend towards hotter, drier summers, implying interactions between climate warming, varying discharge and fluctuatations in both brown trout and salmon. Taken alongside recent data showing effects of warming on survival at sea, these data suggest that Atlantic salmon might be jeopardised by future climatic effects in both their marine and freshwater stages. Effects on non-diadromous brown trout also imply climatically mediated processes in freshwaters or their catchments. Climate projections for the UK suggest that altered summer flow and increasing summer temperatures could exacerbate losses further in these species, and we advocate management actions that combine reduced abstraction with enhanced riparian shading Article in Journal/Newspaper Atlantic salmon North Atlantic North Atlantic oscillation Salmo salar Université de Nantes: HAL-UNIV-NANTES Global Change Biology 16 12 3271 3283 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Life Sciences |
spellingShingle |
Life Sciences Clews, Esther Durance, Isabelle Vaughan, Ian Ormerod, Steve Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
topic_facet |
Life Sciences |
description |
International audience Widespread decline among Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) over recent decades have been linked to pollution, exploitation and catchment modification, but climate change is increasingly implicated. We used long-term, geographically extensive data from the Welsh River Wye, formerly a major salmon river, to examine whether climatically-mediated effects on juveniles (> 0+) might contribute to population change. Populations of Atlantic salmon and brown trout fell across the Wye catchment respectively by 50% and 67% between 1985 and 2004, but could not be explained by pollution because water quality improved during this time. Stream temperatures, estimated from calibrations against weekly air temperature at 8 sites, increased by 0.5-0.7 °C in summer and 0.7-1.0 °C in winter, with larger tributaries warming more than shaded headwaters. Rates of winter warming were slightly greater after accounting for the effect of the North Atlantic Oscillation (1.1-1.4 °C). However, warming through time was smaller than measured variations among tributaries, and alone was insufficient to explain variations in salmonid density. Instead, population variations were best explained in multi-level mixed models by a synoptic variate representing a trend towards hotter, drier summers, implying interactions between climate warming, varying discharge and fluctuatations in both brown trout and salmon. Taken alongside recent data showing effects of warming on survival at sea, these data suggest that Atlantic salmon might be jeopardised by future climatic effects in both their marine and freshwater stages. Effects on non-diadromous brown trout also imply climatically mediated processes in freshwaters or their catchments. Climate projections for the UK suggest that altered summer flow and increasing summer temperatures could exacerbate losses further in these species, and we advocate management actions that combine reduced abstraction with enhanced riparian shading |
author2 |
School of Biosciences Cardiff Cardiff University Biological Sciences National University of Singapore (NUS) |
format |
Article in Journal/Newspaper |
author |
Clews, Esther Durance, Isabelle Vaughan, Ian Ormerod, Steve |
author_facet |
Clews, Esther Durance, Isabelle Vaughan, Ian Ormerod, Steve |
author_sort |
Clews, Esther |
title |
Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
title_short |
Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
title_full |
Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
title_fullStr |
Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
title_full_unstemmed |
Juvenile salmonid populations in a temperate river system track synoptic trends in climate |
title_sort |
juvenile salmonid populations in a temperate river system track synoptic trends in climate |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616/document https://hal.archives-ouvertes.fr/hal-00552616/file/PEER_stage2_10.1111%252Fj.1365-2486.2010.02211.x.pdf https://doi.org/10.1111/j.1365-2486.2010.02211.x |
genre |
Atlantic salmon North Atlantic North Atlantic oscillation Salmo salar |
genre_facet |
Atlantic salmon North Atlantic North Atlantic oscillation Salmo salar |
op_source |
ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-00552616 Global Change Biology, Wiley, 2010, 16 (12), pp.3271. ⟨10.1111/j.1365-2486.2010.02211.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2010.02211.x hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616 https://hal.archives-ouvertes.fr/hal-00552616/document https://hal.archives-ouvertes.fr/hal-00552616/file/PEER_stage2_10.1111%252Fj.1365-2486.2010.02211.x.pdf doi:10.1111/j.1365-2486.2010.02211.x |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-2486.2010.02211.x |
container_title |
Global Change Biology |
container_volume |
16 |
container_issue |
12 |
container_start_page |
3271 |
op_container_end_page |
3283 |
_version_ |
1766361542316523520 |