title: How contamination sources and soil properties can influence the Cd and Pb bioavailability to snails.
abstract: To better understand the fate of metals in the environment, numerous parameters must be studied, such as the soil properties and the different sources of contamination for the organisms. Among bioindicators of soil quality, the garden snail (Cantareus aspersus) integrates multiple sources (e.g. soil, plant) and routes (e.g. digestive, cutaneous) of contamination. However, the contribution of each source on metal bioavailability and how soil properties influence these contributions have never been studied when considering the dynamic process of bioavailability. Using accumulation kinetics, this study showed that the main assimilation source of Cd was lettuce (68%), whereas the main source of Pb was the soil (90%). The plant contribution increased in response to a 2-unit soil pH decrease. Unexpectedly, an increase in the soil contribution to metal assimilation accompanied an increase in the organic matter (OM) content of the soil. For both metals, no significant excretion and influence of source on excretion have been modelled either during exposure or depuration. This study highlights how the contribution of different sources to metal bioavailability changes based on changes in soil parameters, such as pH and OM, and the complexity of the processes that modulate metal bioavailability.
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France. benjamin.pauget@univ-fcomte.fr.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Pauget
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gimbert
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France.
authors.forename: Mickael
authors.initials: M
authors.lastname: Coeurdassier
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France.
authors.forename: Coline
authors.initials: C
authors.lastname: Druart
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France.
authors.forename: Nadia
authors.initials: N
authors.lastname: Crini
authors.affiliation: Department of Chrono-Environment, University of Franche-Comte, UMR UFC/CNRS 6249 USC INRA, 16 route de Gray, F-25030, Besancon Cedex, France.
authors.forename: Annette
authors.initials: A
authors.lastname: de Vaufleury
mesh_terms: D000818:Animals; D001682:Biological Availability; D002104:Cadmium / Q000032:analysis* / Q000378:metabolism; D004784:Environmental Monitoring / Q000379:methods*; D007854:Lead / Q000032:analysis* / Q000378:metabolism; D018545:Lactuca / Q000737:chemistry; D012908:Snails / Q000187:drug effects / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead
keywords: Bioavailability; Contamination sources; Kinetics; Metal; Snails; Soil