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Auteur (up) Louati, H.; Said, O.B.; Soltani, A.; Cravo-Laureau, C.; Duran, R.; Aissa, P.; Mahmoudi, E.; Pringault, O. url  doi
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  Titre Responses of a free-living benthic marine nematode community to bioremediation of a PAH mixture Type Article scientifique
  Année 2015 Publication Revue Abrégée Environ Sci Pollut Res  
  Volume 22 Numéro 20 Pages 15307-15318  
  Mots-Clés Atmospheric Protection/Air Quality Control/Air Pollution; Bioaugmentation; Biostimulation; Community response; Ecotoxicology; Environmental Chemistry; Environmental Health; Environment, general; Free-living nematodes; Polycyclic aromatic hydrocarbons; Sediment; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution  
  Résumé The objectives of this study were (1) to assess the responses of benthic nematodes to a polycyclic aromatic hydrocarbon (PAH) contamination and (2) to test bioremediation techniques for their efficiency in PAH degradation and their effects on nematodes. Sediments with their natural nematofauna communities from Bizerte lagoon (Tunisia) were subjected to a PAH mixture (100 ppm) of phenanthrene, fluoranthene, and pyrene during 30 days. Nematode abundance and diversity significantly decreased, and the taxonomic structure was altered. Results from multivariate analyses of the species abundance data revealed that PAH treatments were significantly different from the control. Spirinia parasitifera became the dominant species (70 % relative abundance) and appeared to be an “opportunistic” species to PAH contamination while Oncholaimus campylocercoides and Neochromadora peocilosoma were strongly inhibited. Biostimulation (addition of mineral salt medium) and bioaugmentation (inoculation of a hydrocarbonoclastic bacterium) were used as bioremediation techniques. Bioremediation treatments enhanced degradation of all three PAHs, with up to 96 % degradation for phenanthrene resulting in a significant stimulation of nematode abundance relative to control microcosms. Nevertheless, these treatments, especially the biostimulation provoked a weak impact on the community structure and diversity index relative to the control microcosms suggesting their feasibility in biorestoration of contaminated sediments.  
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  ISSN 0944-1344, 1614-7499 ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1421  
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