A thiotrophic microbial community in an acidic brine lake in Northern Chile

Antonie van Leeuwenhoek
Lorena EscuderoCecilia Demergasso

Abstract

The endorheic basins of the Northern Chilean Altiplano contain saline lakes and salt flats. Two of the salt flats, Gorbea and Ignorado, have high acidic brines. The causes of the local acidity have been attributed to the occurrence of volcanic native sulfur, the release of sulfuric acid by oxidation, and the low buffering capacity of the rocks in the area. Understanding the microbial community composition and available energy in this pristine ecosystem is relevant in determining the origin of the acidity and in supporting the rationale of conservation policies. Besides, a comparison between similar systems in Australia highlights key microbial components and specific ones associated with geological settings and environmental conditions. Sediment and water samples from the Salar de Gorbea were collected, physicochemical parameters measured and geochemical and molecular biological analyses performed. A low diversity microbial community was observed in brines and sediments dominated by Actinobacteria, Algae, Firmicutes and Proteobacteria. Most of the constituent genera have been reported to be either sulfur oxidizing microorganisms or ones having the potential for sulfur oxidation given available genomic data and information drawn...Continue Reading

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Citations

Feb 26, 2021·FEMS Microbiology Ecology·Beichen WangXiying Zhang
Jan 25, 2020·Environmental Science & Technology·Xuan LiGuangming Jiang

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Datasets Mentioned

BETA
LC3777256
LC77772
KC758869-70
KC758874

Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

Analyst
Phylogenetic Investigation of Communities by Reconstruction of...
Multi
PICRUST
PICRUSt ( Phylogenetic Investigation of Communities Reconstruc...
Phylogenetic Investigation of Communities by Reconstruction of...
BLAST
QIIME

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