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Auteur Larras, F.; Rimet, F.; Gregorio, V.; Bérard, A.; Leboulanger, C.; Montuelle, B.; Bouchez, A.
Titre Pollution-induced community tolerance (PICT) as a tool for monitoring Lake Geneva long-term in situ ecotoxic restoration from herbicide contamination Type Article scientifique
Année (down) 2016 Publication Revue Abrégée Environ Sci Pollut Res
Volume 23 Numéro 5 Pages 4301-4311
Mots-Clés Atmospheric Protection/Air Quality Control/Air Pollution; Atrazine; Copper; Ecotoxicology; Environmental Chemistry; Environmental Health; Environment, general; Phytoplankton; Pollution-induced community tolerance (PICT); Restoration; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Résumé Chemical monitoring revealed a regular decrease in herbicide concentration in Lake Geneva since last decades that may be linked to an ecotoxic restoration of nontarget phytoplanktonic communities. The Pollution-induced community tolerance (PICT) approach was tested as a tool to monitor the ecotoxic restoration of Lake Geneva for herbicides from 1999 to 2011. We conducted monthly assessments in 1999 and in 2011 for the tolerance of the phytoplankton communities to two herbicides (atrazine and copper), using PICT bioassays. The taxonomical composition of the communities was determined on the same collecting dates. The herbicide concentration decrease during the 12 years significantly influenced the composition of communities. The PICT monitoring indicated that a significant tolerance decrease in the community to both herbicides accompanied the herbicide concentration decrease. PICT measurements for atrazine and copper also changed at the intra-annual level. These variations were mainly due to community composition shifts linked to seasonal phosphorus and temperature changes. PICT monitoring on a seasonal basis is required to monitor the mean tolerance of communities. PICT appeared to be a powerful tool that reflected the toxic effects on environmental communities and to monitor ecotoxic ecosystem restoration.
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ISSN 0944-1344, 1614-7499 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1557
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Auteur Blanchet, M.; Pringault, O.; Bouvy, M.; Catala, P.; Oriol, L.; Caparros, J.; Ortega-Retuerta, E.; Intertaglia, L.; West, N.; Agis, M.; Got, P.; Joux, F.
Titre Changes in bacterial community metabolism and composition during the degradation of dissolved organic matter from the jellyfish Aurelia aurita in a Mediterranean coastal lagoon Type Article scientifique
Année (down) 2015 Publication Revue Abrégée Environ Sci Pollut Res
Volume 22 Numéro 18 Pages 13638-13653
Mots-Clés Aurelia aurita; Bacterial diversity; Bacterial growth efficiency; biodegradation; heterotrophic bacteria; jellyfish; Organic matter
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ISSN 0944-1344 ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 1387
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Auteur Said, O.B.; Louati, H.; Soltani, A.; Preud’homme, H.; Cravo-Laureau, C.; Got, P.; Pringault, O.; Aissa, P.; Duran, R.
Titre Changes of benthic bacteria and meiofauna assemblages during bio-treatments of anthracene-contaminated sediments from Bizerta lagoon (Tunisia) Type Article scientifique
Année (down) 2015 Publication Revue Abrégée Environ Sci Pollut Res
Volume 22 Numéro 20 Pages 15319-15331
Mots-Clés Anthracene; Atmospheric Protection/Air Quality Control/Air Pollution; Bacteria diversity; Bioremediation; Bizerta lagoon; Community structure; Degradation; Ecotoxicology; Environmental Chemistry; Environmental Health; Environment, general; Meiofauna; Microcosms; PAH degraders; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Résumé Sediments from Bizerta lagoon were used in an experimental microcosm setup involving three scenarios for the bioremediation of anthracene-polluted sediments, namely bioaugmentation, biostimulation, and a combination of both bioaugmentation and biostimulation. In order to investigate the effect of the biotreatments on the benthic biosphere, 16S rRNA gene-based T-RFLP bacterial community structure and the abundance and diversity of the meiofauna were determined throughout the experiment period. Addition of fresh anthracene drastically reduced the benthic bacterial and meiofaunal abundances. The treatment combining biostimulation and bioaugmentation was most efficient in eliminating anthracene, resulting in a less toxic sedimentary environment, which restored meiofaunal abundance and diversity. Furthermore, canonical correspondence analysis showed that the biostimulation treatment promoted a bacterial community favorable to the development of nematodes while the treatment combining biostimulation and bioaugmentation resulted in a bacterial community that advantaged the development of the other meiofauna taxa (copepods, oligochaetes, polychaetes, and other) restoring thus the meiofaunal structure. The results highlight the importance to take into account the bacteria/meiofauna interactions during the implementation of bioremediation treatment.
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Editeur Lieu de Publication Éditeur
Langue en Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0944-1344, 1614-7499 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1415
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Auteur Louati, H.; Said, O.B.; Soltani, A.; Cravo-Laureau, C.; Duran, R.; Aissa, P.; Mahmoudi, E.; Pringault, O.
Titre Responses of a free-living benthic marine nematode community to bioremediation of a PAH mixture Type Article scientifique
Année (down) 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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Langue en Langue du Résumé Titre Original
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Volume de collection Numéro de collection Edition
ISSN 0944-1344, 1614-7499 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1421
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Auteur Farcy, E.; Burgeot, T.; Haberkorn, H.; Auffret, M.; Lagadic, L.; Allenou, J.-P.; Budzinski, H.; Mazzella, N.; Pete, R.; Heydorff, M.; Menard, D.; Mondeguer, F.; Caquet, T.
Titre An integrated environmental approach to investigate biomarker fluctuations in the blue mussel Mytilus edulis L. in the Vilaine estuary, France Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Environ Sci Pollut Res
Volume 20 Numéro 2 Pages 630-650
Mots-Clés Biomarkers; Confounding factors; Environmental fluctuations; Estuary; Mytilus edulis; Organic contaminants; Reproductive cycle; phycotoxins; temperature
Résumé Estuarine areas represent complex and highly changing environments at the interface between freshwater and marine aquatic ecosystems. Therefore, the aquatic organisms living in estuaries have to face highly variable environmental conditions. The aim of this work was to study the influence of environmental changes from either natural or anthropogenic origins on the physiological responses of Mytilus edulis. Mussels were collected in the Vilaine estuary during early summer because this season represents a critical period of active reproduction in mussels and of increased anthropogenic inputs from agricultural and boating activities into the estuary. The physiological status of the mussel M. edulis was evaluated through measurements of a suite of biomarkers related to: oxidative stress (catalase, malondialdehyde), detoxication (benzopyrene hydroxylase, carboxylesterase), neurotoxicity (acetylcholinesterase), reproductive cycle (vitelline, condition index, maturation stages), immunotoxicity (hemocyte concentration, granulocyte percentage, phagocytosis, reactive oxygen species production, oxidative burst), and general physiological stress (lysosomal stability). A selection of relevant organic contaminant (pesticides, (polycyclic aromatic hydrocarbons, polychlorobiphenyls) was measured as well as environmental parameters (water temperature, salinity, total suspended solids, turbidity, chlorophyll a, pheopigments) and mussel phycotoxin contamination. Two locations differently exposed to the plume of the Vilaine River were compared. Both temporal and inter-site variations of these biomarkers were studied. Our results show that reproduction cycle and environmental parameters such as temperature, organic ontaminants, and algal blooms could strongly influence the biomarker responses. These observations highlight the necessity to conduct integrated environmental approaches in order to better understand the causes of biomarker variations.
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Langue English Langue du Résumé Titre Original
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Volume de collection Numéro de collection Edition
ISSN 0944-1344 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 420
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