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Diffuse urban pollution increases metal tolerance of natural heterotrophic biofilms
2012
Fechner, L.C. | Gourlay-Francé, C. | Bourgeault, A. | Tusseau-Vuillemin, M.H. | AgroParisTech | Hydrosystèmes et Bioprocédés (UR HBAN) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Laboratoire d’Oéanographie Spatiale [Plouzané] (LOS) ; Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]BELCA | This study is a first attempt to investigate the impact of urban contamination on metal tolerance of heterotrophic river biofilms using a short-term test based on β-glucosidase activity. Tolerance levels to Cu, Cd, Zn, Ni and Pb were evaluated for biofilms collected at three sites along an urban gradient in the Seine river (France). Metallic pollution increased along the river, but concentrations remained low compared to environmental quality standards. Biofilm metal tolerance increased downstream from the urban area. Multivariate analysis confirmed the correlation between tolerance and contamination and between multi-metallic and physico-chemical gradients. Therefore, tolerance levels have to be interpreted in relation to the whole chemical and physical characteristics and not solely metal exposure. We conclude that community tolerance is a sensitive biological response to urban pressure and that mixtures of contaminants at levels lower than quality standards might have a significant impact on periphytic communities.
Show more [+] Less [-]On the design and use of a fresh water sampling apparatus to concentrate and extract organic micropollutants on a continuous basis
1991
Turcotte, J. (Universite Laval, Quebec (Canada). Faculte des Sciences et de Genie, Departement de Chimie) | Cote, J.E. | Fraser, E.
Antioxidant systems and lipoperoxidation as biomarkers in the freshwater bivalve, Unio sp.
1995
Doyotte, A. (Universite de Metz (France). Centre des Sciences de l'Environnement) | Cossu, C. | Jacquin, M.C. | Vasseur, P.
[Bioindication of water quality by aquatic macrophytes: role of phosphorus [an example: a study of rivers in Alsace (France)]]
1995
Robach, F. (Institut de Botanique, Strasbourg (France). Laboratoire de Botanique et d'Ecologie Vegetale) | Merlin, S. | Rolland, T. | Tremolieres, M.
Nitrate reductase activity in aquatic plants as an indicator of ammoniacal nitrogen contamination
1995
Rolland, T. (Institut de Botanique, Strasbourg (France). Laboratoire de Botanique et d'Ecologie Vegetale) | Robach, F. | Tremolieres, M. | Dester, S.
Macrophyte indices to assess stream water quality: preliminary proposals from the group of scientific interest "macrophytes of inland waters"
1995
Haury, J. (Institut National de la Recherche Agronomique, Rennes (France). Centre de Rennes, Ecologie et Physiologie des Poissons) | Peltre, M.C. | Muller, S. | Tremolieres, M. | Barbe, J. | Dutartre, A. | Guerlesquin, M.
Biotoxitel. Biological water pollution sensor by monitoring algae photosynthetic activity
1995
Ory, J.M. (Centre de Recherche en Automatisme de Nancy, Vandoeuvre (France)) | Jacques, F.
