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Structural and biological trait responses of diatom assemblages to organic chemicals in outdoor flow-through mesocosms.
Bayona, Yannick; Roucaute, Marc; Cailleaud, Kevin; Lagadic, Laurent; Bassères, Anne; Caquet, Thierry.
Afiliación
  • Bayona Y; INRA, UMR985 Écologie et Santé des Écosystèmes, Équipe Écotoxicologie et Qualité des Milieux Aquatiques, Agrocampus Ouest, 65 rue de Saint Brieuc, F-35042 Rennes, France; Service Environnement, TOTAL, Pôle d'Etude et de Recherche de Lacq, RN 117, BP 47, F-64170 Lacq, France. Electronic address: y.ba
  • Roucaute M; INRA, UMR985 Écologie et Santé des Écosystèmes, Équipe Écotoxicologie et Qualité des Milieux Aquatiques, Agrocampus Ouest, 65 rue de Saint Brieuc, F-35042 Rennes, France.
  • Cailleaud K; Service Environnement, TOTAL, Pôle d'Etude et de Recherche de Lacq, RN 117, BP 47, F-64170 Lacq, France.
  • Lagadic L; INRA, UMR985 Écologie et Santé des Écosystèmes, Équipe Écotoxicologie et Qualité des Milieux Aquatiques, Agrocampus Ouest, 65 rue de Saint Brieuc, F-35042 Rennes, France.
  • Bassères A; Service Environnement, TOTAL, Pôle d'Etude et de Recherche de Lacq, RN 117, BP 47, F-64170 Lacq, France.
  • Caquet T; INRA, UMR985 Écologie et Santé des Écosystèmes, Équipe Écotoxicologie et Qualité des Milieux Aquatiques, Agrocampus Ouest, 65 rue de Saint Brieuc, F-35042 Rennes, France.
Environ Pollut ; 192: 186-95, 2014 Sep.
Article en En | MEDLINE | ID: mdl-24955527
The sensitivity of diatom taxonomy and trait-based endpoints to chemicals has been poorly used so far in Environmental Risk Assessment. In this study, diatom assemblages in outdoor flow-through mesocosms were exposed to thiram (35 and 170 µg/L), and a hydrocarbon emulsion (HE; 0.01, 0.4, 2 and 20 mg/L). The effects of exposure were assessed for 12 weeks, including 9 weeks post-treatment, using taxonomic structure and diversity, bioindication indices, biological traits, functional diversity indices, indicator classes and ecological guilds. For both chemicals, diversity increased after the treatment period, and responses of ecological traits were roughly identical with an abundance increase of motile taxa tolerant to organic pollution and decrease of low profile taxa. Bioindication indices were not affected. Traits provided a complementary approach to biomass measurements and taxonomic descriptors, leading to a more comprehensive overview of ecological changes due to organic chemicals, including short- and long-term effects on biofilm structure and functioning.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Orgánicos / Contaminantes Químicos del Agua / Monitoreo del Ambiente / Diatomeas Tipo de estudio: Risk_factors_studies Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2014 Tipo del documento: Article Pais de publicación: Reino Unido
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Orgánicos / Contaminantes Químicos del Agua / Monitoreo del Ambiente / Diatomeas Tipo de estudio: Risk_factors_studies Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2014 Tipo del documento: Article Pais de publicación: Reino Unido