Changes in the distribution of copepods ...
Document type :
Article dans une revue scientifique: Article original
Title :
Changes in the distribution of copepods in the Gironde estuary: A warming and marinisation consequence?
Author(s) :
Chaalali, A. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Chevillot, X. [Auteur]
Ecosystèmes estuariens et poissons migrateurs amphihalins [UR EPBX]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Beaugrand, Grégory [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
David, V. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Luczak, C. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Boët, Philippe [Auteur]
Ecosystèmes estuariens et poissons migrateurs amphihalins [UR EPBX]
Sottolichio, A. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Sautour, B. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Chevillot, X. [Auteur]
Ecosystèmes estuariens et poissons migrateurs amphihalins [UR EPBX]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Beaugrand, Grégory [Auteur]

Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
David, V. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Luczak, C. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Boët, Philippe [Auteur]
Ecosystèmes estuariens et poissons migrateurs amphihalins [UR EPBX]
Sottolichio, A. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Sautour, B. [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Journal title :
Estuarine, Coastal and Shelf Science
Pages :
150-161
Publisher :
Elsevier
Publication date :
2013
ISSN :
0272-7714
Keyword(s) :
GIRONDE ESTUAIRE
English abstract : [en]
The Gironde is the largest estuary of South-West Europe and is one of the best monitored estuarine systems in the world. This macrotidal estuary is characterized by a low biodiversity in both oligo- and mesohaline zones. ...
Show more >The Gironde is the largest estuary of South-West Europe and is one of the best monitored estuarine systems in the world. This macrotidal estuary is characterized by a low biodiversity in both oligo- and mesohaline zones. Its zooplankton community is constituted by only five major species, three calanoid copepods (including one invasive species) and two mysids. Retrospective analyses have already documented a warming associated to a phenomenon of marinisation. Here, we investigate the influence of both marinisation and warming on the spatial distribution and the abundance of copepods (i.e. Eurytemora affinis, Acartia bifilosa and neritic species) in the Gironde estuary. We modelled the environmental envelope of the copepods as a function of salinity and temperature to demonstrate that the alteration of their longitudinal distribution in the estuary between 1975 and 2003 was the result of both changing temperature and salinity. Although the upstream movement of neritic species was mostly related to salinity, we show that the augmentation of both temperature and salinity was at the origin of the upstream progression of both A. bifilosa and E. affinis. These results suggest that the distribution of copepods can be affected by both anthropogenic forcing and climatic change, which modulate the physic-chemistry of the Gironde estuary.Show less >
Show more >The Gironde is the largest estuary of South-West Europe and is one of the best monitored estuarine systems in the world. This macrotidal estuary is characterized by a low biodiversity in both oligo- and mesohaline zones. Its zooplankton community is constituted by only five major species, three calanoid copepods (including one invasive species) and two mysids. Retrospective analyses have already documented a warming associated to a phenomenon of marinisation. Here, we investigate the influence of both marinisation and warming on the spatial distribution and the abundance of copepods (i.e. Eurytemora affinis, Acartia bifilosa and neritic species) in the Gironde estuary. We modelled the environmental envelope of the copepods as a function of salinity and temperature to demonstrate that the alteration of their longitudinal distribution in the estuary between 1975 and 2003 was the result of both changing temperature and salinity. Although the upstream movement of neritic species was mostly related to salinity, we show that the augmentation of both temperature and salinity was at the origin of the upstream progression of both A. bifilosa and E. affinis. These results suggest that the distribution of copepods can be affected by both anthropogenic forcing and climatic change, which modulate the physic-chemistry of the Gironde estuary.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Comment :
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE
Source :