SCHNEIDER, Arnaud R.; GOMMEAUX, Maxime; DUCLERCQ, Jérôme; FANIN, Nicolas; CONREUX, Alexandra; ALAHMAD, Abdelrahman; LACOUX, Jérôme; ROGER, David; SPICHER, Fabien; PONTHIEU, Marie; CANCÈS, Benjamin; MORVAN, Xavier; MARIN, Béatrice

doi:10.1016/j.scitotenv.2017.06.159

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SCHNEIDER, Arnaud R.
Groupe d'Étude sur les Géomatériaux et Environnements Naturels, Anthropiques et Archéologiques - EA 3795 [GEGENAA]
Centre National de la Recherche Scientifique [CNRS]

GOMMEAUX, Maxime
Groupe d'Étude sur les Géomatériaux et Environnements Naturels, Anthropiques et Archéologiques - EA 3795 [GEGENAA]
Centre National de la Recherche Scientifique [CNRS]

DUCLERCQ, Jérôme
Ecologie et Dynamique des Systèmes Anthropisés - UMR CNRS 7058 UPJV [EDYSAN]

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Science of the Total Environment. 2017, vol. 605-606, p. 436-444

Elsevier

Résumé en anglais

Anthropogenic inputs of trace elements (TE) into soils constitute a major public and environmental health problem. Bioavailability of TE is strongly related to the soil physicochemical parameters and thus to the ecosystem type. In order to test whether soil parameters influence the response of the bacterial community to TE pollution, we collected soil samples across contrasting ecosystems (hardwood, coniferous and hydromorphic soils), which have been contaminated in TE and especially lead (Pb) over several decades due to nearby industrial smelting activities. Bacterial community composition was analysed using high throughput amplicon sequencing and compared to the soil physicochemical parameters. Multivariate analyses of the pedological and biological data revealed that the bacterial community composition was affected by ecosystem type in the first place. An influence of the contamination level was also evidenced within each ecosystem. Despite the important variability in bacterial community structure, we found that specific bacterial groups such as γ-Proteobacteria, Verrucomicrobia and Chlamydiae showed a consistent response to Pb content across contrasting ecosystems. Verrucomicrobia were less abundant at high contamination level whereas Chlamydiae and γ-Proteobacteria were more abundant. We conclude that such groups and ratio's thereof can be considered as relevant bioindicators of Pb contamination.< Réduire

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anthropique

biodisponibilité

teneur en oligo element

analyse de sol

Mots clés en anglais

Pb contamination

Pb bioavailability

bacterial diversity

bioindicator

chlamydiae

verrucomicrobia

anthropic

bioavailability

soil analysis

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Response of bacterial communities to Pb smelter pollution in contrasting soils

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