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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Autores principales:	Elorri Arevalo, Hilaire Drouineau, Stéphane Tétard, Caroline M. F. Durif, Ola H. Diserud, W. Russell Poole, Anthony Maire
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0
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spelling	oai:doaj.org-article:bb3e6aeb331845329ac52b5fb6d642c02021-12-02T16:46:35ZJoint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel10.1038/s41598-021-96302-x2045-2322https://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c02021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96302-xhttps://doaj.org/toc/2045-2322Abstract 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.Elorri ArevaloHilaire DrouineauStéphane TétardCaroline M. F. DurifOla H. DiserudW. Russell PooleAnthony MaireNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	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
description	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
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://doaj.org/article/bb3e6aeb331845329ac52b5fb6d642c0
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Joint temporal trends in river thermal and hydrological conditions can threaten the downstream migration of the critically endangered European eel

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