Impacts of bioremediation schemes for the mitigation of a low-dose anthracene contamination on free-living marine benthic nematodes Louati H. auteur aut IRD Ben Said O. auteur aut IRD Soltani A. auteur aut IRD Cravo-Laureau C. auteur aut IRD Preud'Homme H. auteur aut IRD Duran R. auteur aut IRD Aissa P. auteur aut IRD Mahmoudi E. auteur aut IRD Pringault Olivier auteur aut IRD text journalArticle eng text/pdf born digital access A microcosm experiment was used to examine (1) the effects of different bioremediation schemes on degradation of anthracene and the structure of free-living marine nematodes in a lightly contaminated (4.5 mu g g(-1)) sediment from Bizerte lagoon and (2) the responses of the nematode community upon an artificial spiking of a low dose anthracene (1 mu g g(-1)). For that purpose sediment microcosms were incubated in laboratory for 40 days. Bioremediation techniques decreased the anthracene contamination, and interestingly, biodegradation were more efficient when anthracene was artificial supplied into the sediment suggesting that the addition of bioavailable anthracene stimulated the bacterial community to adjust towards a PAH-degrading community. Spiking with this low dose of anthracene provoked significant changes in the nematode community structure and abundance, with the elimination of specific species such as Mesacanthion diplechma, the decrease of the dominant species Oncholaimus campylocercoides and the increase in abundance of opportunistic species such as Spirinia parasitifera. This would suggest a low tolerance of the nematode community despite the presence of a weak anthracene contamination in the sediment that could have allow dominance of an anthracene tolerant nematode species. Anthracene toxicity was alleviated in biostimulation treatments, leading to a strong increase in nematode abundance, concomitantly with changes in the nematode community structure; Prochromadorella neapolitana became the most abundant species. specialized Free-living nematodes Anthracene Bioremediation Community structure Microcosm experiment Bizerte lagoon TUNISIE 038 036 Ecotoxicology 23 2 201-212 2014 0963-9292 https://www.documentation.ird.fr/hor/fdi:010061772 10.1007/s10646-013-1163-9 0963-9292 [F B010061772] https://www.documentation.ird.fr/hor/fdi:010061772 https://www.documentation.ird.fr/intranet/publi/2014/03/010061772.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-04-02 2017-08-23 fdi:010061772 fre