Seasonal effects of cadmium accumulation in periphytic diatom communities of freshwater biofilms ; Variations saisonnières de l'accumulation de cadmium par les communautés périphytiques en cours d'eau
In: ISSN: 0166-445X ; Aquatic Toxicology ; https://hal.inrae.fr/hal-02590999 ; Aquatic Toxicology, 2008, 2008
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Zugriff:
[Departement_IRSTEA]MA [TR1_IRSTEA]QSA / DYNAQ ; International audience ; The relationships between diatom species and cadmium (Cd) accumulated in biofilms of the Riou-Mort River (SW, France) were studied in July 2004 and March 2005. Biofilms were sampled from artificial substrates immersed along a metallic pollution gradient during 20 days. Dynamics of diatom communities and cadmium accumulation were followed by collecting samples after 4, 7, 14 and 20 days of biofilm colonization. Cd accumulation in biofilms during experiment was significantly higher in Cd polluted station (Joanis) than in reference station (Firmi) for both seasons. Periphytic diatom composition varied between sites and seasons. At Firmi station, seasonal dynamics of diatom communities were stable with the dominance of Cyclotella meneghiniana and Melosira varians in July and Surirellabrebissonnii and Navicula gregaria in March. At Joanis station, diatom communities mainly responded to high levels of metal by a high proportion of small, adnate species. Positive correlations between Eolimna minima, Nitzschia palea, Encyonema minutum, Surirella angusta, and Gomphonema parvulum and cadmium accumulation were observed, indicating that these species are tolerant to high levels of cadmium. On the other hand, negative correlations of C. meneghiniana, N. gregaria, Navicula lanceolata, M. varians and Nitzschia dissipata with cadmium qualify them as sensitive diatom species. Periphytic diatom composition through the presence of specific species highlight metal tolerant indicator diatom groups which will be meaningful for biomonitoring pollution in natural aquatic systems.
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Seasonal effects of cadmium accumulation in periphytic diatom communities of freshwater biofilms ; Variations saisonnières de l'accumulation de cadmium par les communautés périphytiques en cours d'eau
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Autor/in / Beteiligte Person: | Duong, T.T. ; Morin, Soizic ; Herlory, O. ; Feurtet Mazel, A. ; Coste, Michel ; Boudou, A. ; INSTITUTE OF ENVIRONMENTAL TECHNOLOGY HANOI, VNM ; Partenaires, IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) ; Environnements et Paléoenvironnements OCéaniques (EPOC) ; Observatoire aquitain des sciences de l'univers (OASU) ; Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) ; Réseaux épuration et qualité des eaux (UR REBX) ; Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
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Zeitschrift: | ISSN: 0166-445X ; Aquatic Toxicology ; https://hal.inrae.fr/hal-02590999 ; Aquatic Toxicology, 2008, 2008 |
Veröffentlichung: | HAL CCSD ; Elsevier, 2008 |
Medientyp: | academicJournal |
DOI: | 10.1016/j.aquatox.2008.07.012 |
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