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Auteur (up) Feuilloley, G.; Fromentin, J.-M.; Stemmann, L.; Demarcq, H.; Estournel, C.; Saraux, C. doi  openurl
  Titre Concomitant changes in the environment and small pelagic fish community of the Gulf of Lions Type Article scientifique
  Année 2020 Publication Revue Abrégée Prog. Oceanogr.  
  Volume 186 Numéro Pages 102375  
  Mots-Clés algorithm; anchovy; Bottom-up control; Chlorophyll-a; circulation; climate; Environmental change; fronts; mediterranean sea; Northwestern Mediterranean Sea; oscillation; planktonic ecosystem; pressure; Small pelagic fish; variability  
  Résumé An important decrease in small pelagic fish condition and size has been observed in the most productive ecosystem of the Mediterranean Sea, the Gulf of Lions, since 2008, leading to an important fishery crisis. Previous studies suggested bottom-up control to be the most probable cause for these changes. Here, we investigate whether an environmental change might have caused such a situation. In the absence of zooplankton time series, this study aims at describing temporal changes in key abiotic factors for the planktonic and fish production of the Gulf of Lions, such as SST, meso-scale fronts, wind-induced coastal upwelling, river discharge, water stratification and deep convection and then at understanding potential link on Chl-a concentration as well as small pelagic fish populations. Our results indicate that the environmental conditions have broadly changed in the Gulf of Lion, with a major change in the mid-2000s, affecting the Chla concentration (which showed a regime shift in 2007), but also the SST, the upwelling and frontal activities, the Rhone river discharge (and particularly the N and P nutrients inputs) as well as the deep winter convection. Those changes could have affected the plankton production and consequently the small pelagic fish community that displayed similar patterns of variations as the environmental conditions.  
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  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0079-6611 ISBN Médium  
  Région Expédition Conférence  
  Notes WOS:000552124300015 Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2842  
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