Journal
MICROBIAL ECOLOGY
Volume 61, Issue 4, Pages 793-810Publisher
SPRINGER
DOI: 10.1007/s00248-011-9808-9
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Funding
- Institut National des Sciences de l'Univers, CNRS
- Observatoire de Recherche Mediterraneen en Environnement (OSU-OREME)
- Agence Nationale de la Recherche [ANR 07-BLANC-0118]
- French Ministry of Education and Research
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Acid mine drainage of the CarnoulSs mine (France) is characterized by acid waters containing high concentrations of arsenic and iron. In the first 30 m along the Reigous, a small creek draining the site, more than 38% of the dissolved arsenic was removed by co-precipitation with Fe(III), in agreement with previous studies, which suggest a role of microbial activities in the co-precipitation of As(III) and As(V) with Fe(III) and sulfate. To investigate how this particular ecosystem functions, the bacterial community was characterized in water and sediments by 16S rRNA encoding gene library analysis. Based on the results obtained using a metaproteomic approach on sediments combined with high-sensitivity HPLC-chip spectrometry, several GroEL orthologs expressed by the community were characterized, and the active members of the prokaryotic community inhabiting the creek sediments were identified. Many of these bacteria are beta-proteobacteria such as Gallionella and Thiomonas, but gamma-proteobacteria such as Acidithiobacillus ferrooxidans and alpha-proteobacteria such as Acidiphilium, Actinobacteria, and Firmicutes were also detected.
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