Proteo and Actinobacteria Diversity at a Sulfide, Salt and Acid-Rich Lake in the North of Chile

Carol S. Davis-Belmar; Eric Pinto; Cecilia Demergasso; George Rautenbach

doi:10.4028/www.scientific.net/AMR.825.37

Paper Titles

Microbiological Communities in Two Acidic Mine Pit Lakes in the Iberian Pyrite Belt (IPB), Spain
p.19

Microbial Ecology in Extreme Acidic Pit Lakes from the Iberian Pyrite Belt (SW Spain)
p.23

Geochemistry and Microbiology in an Acidic, High Altitude (4,000 m) Salt Flat — High Andes, Northern Chile
p.28

Quantification of the Microbial Community in Lateritic Deposits
p.33

Proteo and Actinobacteria Diversity at a Sulfide, Salt and Acid-Rich Lake in the North of Chile
p.37

Microbial Community Composition on Lignite before and after the Addition of Phosphate Mining Wastes
p.42

Underground Degradation of Lignite Coal Spoil Material by a Mixed Microbial Community under Acid Mine Drainage Conditions
p.46

Insights into Bacterial Community Structure of a Commercial Copper Bioheapleaching Plant: Growth of Heterotrophic Bacteria in the System
p.50

Enrichment of "Ferrovum" spp. and Gallionella Relatives Using Artificial Mine Water
p.54

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 825Proteo and Actinobacteria Diversity at a Sulfide,...

Proteo and Actinobacteria Diversity at a Sulfide, Salt and Acid-Rich Lake in the North of Chile

Abstract:

The Salar de Gorbea, located at the hyperarid Atacama region of the north of Chile, is an unusual extreme environment. Its unique characteristics of high acidity and salt concentration as well as the presence of sulfide and hydrothermal alterations, makes it an unprecedented source of novel microbial communities with potential biotechnological prospects. Several lakes covering a wide range of chloride concentrations were sampled, characterized and enriched under acidic and high salt conditions. Site samples were characterized by the presence of novel Proteobacteria and Actinobacteria strains with closest relatives of the genera Leifsonia, Francisella, Novosphingobium, Mycobacterium, Dunaliela and Rickettsia. Several enrichments on diverse conditions and substrates (pyrite, elemental sulfur, ferrous iron and different organic compounds) were tested although few enrichments provided considerable and reproducible growth. Successful enrichments showed the presence and growth of novel strains of the genera Acidisoma and Alkalibacter, genera that have been identified as part of communities that prosper in acid mine drainage systems. The later enrichments were grown under mixotrophic conditions and gradually exposed to increasing concentrations of chloride.

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Periodical:

Advanced Materials Research (Volume 825)

Pages:

37-41

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.825.37

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Online since:

October 2013

Authors:

Carol S. Davis-Belmar, Eric Pinto, Cecilia Demergasso, George Rautenbach

Keywords:

Acid Saline Lakes, Acidisoma, Actinobacteria, Alkalibacter, Microbial Diversity, Salar

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