Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel
Abstract Climate change is modifying the hydrological and thermal regimes of rivers worldwide, threatening the triggering of organisms’ key life-cycle processes. European eel (Anguilla anguilla) is a critically endangered fish species that migrates over several thousand kilometres between its rearin...
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ftdoajarticles:oai:doaj.org/article:bb3e6aeb331845329ac52b5fb6d642c0 2023-05-15T13:27:49+02:00 Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel Elorri Arevalo Hilaire Drouineau Stéphane Tétard Caroline M. F. Durif Ola H. Diserud W. Russell Poole Anthony Maire 2021-08-01T00:00:00Z https://doi.org/10.1038/s41598-021-96302-x https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0 EN eng Nature Portfolio https://doi.org/10.1038/s41598-021-96302-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-96302-x 2045-2322 https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0 Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) Medicine R Science Q article 2021 ftdoajarticles https://doi.org/10.1038/s41598-021-96302-x 2022-12-31T13:54:01Z Abstract Climate change is modifying the hydrological and thermal regimes of rivers worldwide, threatening the triggering of organisms’ key life-cycle processes. European eel (Anguilla anguilla) is a critically endangered fish species that migrates over several thousand kilometres between its rearing habitats in continental waters of Europe and North Africa and its spawning area in the Sargasso Sea. Downstream migration of adult eels occurs during periods of decreasing river water temperature associated with high discharge but changes in these environmental cues may affected eel migratory conditions. An innovative multivariate method was developed to analyse long-term datasets of daily water temperature, discharge and eel passage in two European rivers. Over the past 50 years, water temperature and discharge increased in both rivers during the downstream migration period from August to November. Silver eels preferentially migrated at temperatures between 10 and 20 °C combined with high discharge. Environmental changes have resulted in the migration of silver eels under warmer water temperatures. This example illustrates how the changes in environmental cues have led to a growing mismatch between the migratory conditions preferentially selected and those actually used, which may threaten the completion of the eel’s life cycle and ultimately the persistence of this already critically endangered species. Article in Journal/Newspaper Anguilla anguilla European eel Directory of Open Access Journals: DOAJ Articles Scientific Reports 11 1 |
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Medicine R Science Q Elorri Arevalo Hilaire Drouineau Stéphane Tétard Caroline M. F. Durif Ola H. Diserud W. Russell Poole Anthony Maire Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
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Medicine R Science Q |
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Abstract Climate change is modifying the hydrological and thermal regimes of rivers worldwide, threatening the triggering of organisms’ key life-cycle processes. European eel (Anguilla anguilla) is a critically endangered fish species that migrates over several thousand kilometres between its rearing habitats in continental waters of Europe and North Africa and its spawning area in the Sargasso Sea. Downstream migration of adult eels occurs during periods of decreasing river water temperature associated with high discharge but changes in these environmental cues may affected eel migratory conditions. An innovative multivariate method was developed to analyse long-term datasets of daily water temperature, discharge and eel passage in two European rivers. Over the past 50 years, water temperature and discharge increased in both rivers during the downstream migration period from August to November. Silver eels preferentially migrated at temperatures between 10 and 20 °C combined with high discharge. Environmental changes have resulted in the migration of silver eels under warmer water temperatures. This example illustrates how the changes in environmental cues have led to a growing mismatch between the migratory conditions preferentially selected and those actually used, which may threaten the completion of the eel’s life cycle and ultimately the persistence of this already critically endangered species. |
format |
Article in Journal/Newspaper |
author |
Elorri Arevalo Hilaire Drouineau Stéphane Tétard Caroline M. F. Durif Ola H. Diserud W. Russell Poole Anthony Maire |
author_facet |
Elorri Arevalo Hilaire Drouineau Stéphane Tétard Caroline M. F. Durif Ola H. Diserud W. Russell Poole Anthony Maire |
author_sort |
Elorri Arevalo |
title |
Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
title_short |
Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
title_full |
Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
title_fullStr |
Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
title_full_unstemmed |
Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel |
title_sort |
joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered european eel |
publisher |
Nature Portfolio |
publishDate |
2021 |
url |
https://doi.org/10.1038/s41598-021-96302-x https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) |
op_relation |
https://doi.org/10.1038/s41598-021-96302-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-96302-x 2045-2322 https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0 |
op_doi |
https://doi.org/10.1038/s41598-021-96302-x |
container_title |
Scientific Reports |
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11 |
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1 |
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1766400601646694400 |