title: Effects of sewage sludge amendment on snail growth and trace metal transfer in the soil-plant-snail food chain.
abstract: Cu, Zn, Pb, and Cd concentrations in a soil plant (Lactuca sativa) continuum were measured after sewage sludge amendment. The effects of sewage sludge on growth and trace metal bioaccumulation in snails (Cantareus aspersus) were investigated in a laboratory experiment specifically designed to identify contamination sources (e.g., soil and leaves). Application of sewage sludge increased trace metal concentrations in topsoil. However, except Zn, metal concentrations in lettuce leaves did not reflect those in soil. Lettuce leaves were the main source of Zn, Cu, and Cd in exposed snails. Bioaccumulation of Pb suggested its immediate transfer to snails via the soil. No apparent toxic effects of trace metal accumulation were observed in snails. Moreover, snail growth was significantly stimulated at high rates of sludge application. This hormesis effect may be due to the enhanced nutritional content of lettuce leaves exposed to sewage sludge.
authors.affiliation: Jean-François Champollion University Center for Teaching and Research, Place Verdun, F-81000, Albi, France.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bourioug
authors.affiliation: Chrono-Environnement UMR CNRS 6249, University of Bourgogne Franche-Comté, 16 Route de Gray, F-25000, Besançon, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gimbert
authors.affiliation: Chrono-Environnement UMR CNRS 6249, University of Bourgogne Franche-Comté, 16 Route de Gray, F-25000, Besançon, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Alaoui-Sehmer
authors.affiliation: RITTMO Agroenvironnement, ZA Biopôle, 37 rue de Herrlisheim, CS 80023, F-68025, Colmar cedex, France.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Benbrahim
authors.affiliation: Chrono-Environnement UMR CNRS 6249, University of Bourgogne Franche-Comté, 16 Route de Gray, F-25000, Besançon, France.
authors.forename: Pierre-Marie
authors.initials: PM
authors.lastname: Badot
authors.affiliation: Chrono-Environnement UMR CNRS 6249, University of Bourgogne Franche-Comté, 16 Route de Gray, F-25000, Besançon, France.
authors.forename: Badr
authors.initials: B
authors.lastname: Alaoui-Sossé
authors.affiliation: Chrono-Environnement UMR CNRS 6249, University of Bourgogne Franche-Comté, 16 Route de Gray, F-25000, Besançon, France. lotfi.aleya@univ-fcomte.fr.
authors.forename: Lotfi
authors.initials: L
authors.lastname: Aleya
mesh_terms: D000818:Animals; D001692:Biological Transport / Q000187:drug effects; D020387:Food Chain; D018545:Lactuca / Q000187:drug effects / Q000378:metabolism*; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D012722:Sewage / Q000737:chemistry*; D012908:Snails / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000633:toxicity; D014131:Trace Elements / Q000378:metabolism*; D018505:Waste Management
chemical_list: D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D014131:Trace Elements
keywords: Bioaccumulation; Cantareus aspersus; Lactuca sativa; Sewage sludge; Terrestrial snail; Trace metals