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Auteur (up) Theuerkauff, D.; Rivera-Ingraham, G.A.; Lambert, S.; Mercky, Y.; Lejeune, M.; Lignot, J.-H.; Sucre, E. doi  openurl
  Titre Wastewater bioremediation by mangrove ecosystems impacts crab ecophysiology: In-situ caging experiment Type Article scientifique
  Année 2020 Publication Revue Abrégée Aquat. Toxicol.  
  Volume 218 Numéro Pages 105358  
  Mots-Clés antioxidant enzyme-activities; assemblages; Bioturbation; blue-crab; contaminants; discharge; ecological role; Ecophysiology; induced oxidative stress; Mangrove; osmoregulation; Osmoregulation; Oxidative stress; superoxide-dismutase; Wastewater; wetland  
  Résumé Mangroves are tidal wetlands that are often under strong anthropogenic pressures, despite the numerous ecosystem services they provide. Pollution from urban runoffs is one such threats, yet some mangroves are used as a bioremediation tool for wastewater (WW) treatment. This practice can impact mangrove crabs, which are key engineer species of the ecosystem. Using an experimental area with controlled WW releases, this study aimed to determine from an ecological and ecotoxicological perspective, the effects of WW on the red mangrove crab Neosarmatium africanum. Burrow density and salinity levels (used as a proxy of WW dispersion) were recorded, and a 3-week caging experiment was performed. Hemolymph osmolality, gill Na+/K+-ATPase (NKA) activity and gill redox balance were assessed in anterior and posterior gills of N. africanum. Burrow density decreased according to salinity decreases around the discharged area. Crabs from the impacted area had a lower osmoregulatory capacity despite gill NKA activity remaining undisturbed. The decrease of the superoxide dismutase activity indicates changes in redox metabolism. However, both catalase activity and oxidative damage remained unchanged in both areas but were higher in posterior gills. These results indicate that WW release may induce osmoregulatory and redox imbalances, potentially explaining the decrease in crab density. Based on these results we conclude that WW release should be carefully monitored as crabs are key players involved in the bioremediation process.  
  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 0166-445x ISBN Médium  
  Région Expédition Conférence  
  Notes WOS:000509631400010 Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2741  
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