e-journal

Bacterial Community Composition in the Water Column of a Lake Formed by a Former Uranium Open Pit Mine

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Abstract
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 sulfiderich 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.

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Informasi Detail

Judul Seri

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No. Panggil

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Penerbit

: Springer Science Business Media., 2012

Deskripsi Fisik

Microb Ecol (2012) 64:870–880

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

EKOLOGI
MIKROBIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

ETY

Versi lain/terkait

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