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Bacterial Community Composition in the Water Column of a Lake Formed by a Former Uranium Open Pit Mine
KTH, Skolan för bioteknologi (BIO), Genteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.ORCID-id: 0000-0002-3627-6899
2012 (engelsk)Inngår i: Microbial Ecology, ISSN 0095-3628, E-ISSN 1432-184X, Vol. 64, nr 4, s. 870-880Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mining of pyrite minerals is a major environmental issue involving both biological and geochemical processes. Here we present a study of an artificial lake of a former uranium open pit mine with the aim to connect the chemistry and bacterial community composition (454-pyrosequencing of 16S rRNA genes) in the stratified water column. A shift in the water chemistry from oxic conditions in the epilimnion to anoxic, alkaline, and metal and sulfide-rich conditions in the hypolimnion was corresponded by a strong shift in the bacterial community, with few shared operational taxonomic units (OTU) between the water layers. The epilimnetic bacterial community of the lake (~20 years old) showed similarities to other temperate freshwater lakes, while the hypolimnetic bacterial community showed similarity to extreme chemical environments. The epilimnetic bacterial community had dominance of Actinobacteria and Betaproteobacteria. The hypolimnion displayed a higher bacterial diversity and was dominated by the phototrophic green sulphur bacterium of the genus Chlorobium (ca. 40 % of the total community). Deltaproteobacteria were only represented in the hypolimnion and the most abundant OTUs were affiliated with ferric iron and sulfate reducers of the genus Geobacter and Desulfobulbus, respectively. The chemistry is clearly controlling, especially the hypolimnetic, bacterial community but the community composition also indicates that the bacteria are involved in metal cycling in the lake.

sted, utgiver, år, opplag, sider
2012. Vol. 64, nr 4, s. 870-880
Emneord [en]
Actinobacteria, Bacteria (microorganisms), Betaproteobacteria, Chlorobium, Deltaproteobacteria, Desulfobulbus, Geobacter, Otus
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-104945DOI: 10.1007/s00248-012-0069-zISI: 000310127900003Scopus ID: 2-s2.0-84867690566OAI: oai:DiVA.org:kth-104945DiVA, id: diva2:570359
Forskningsfinansiär
Science for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Research Council
Merknad

QC 20121119

Tilgjengelig fra: 2012-11-19 Laget: 2012-11-14 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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Andersson, Anders F.
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