| Title |
Characterization of bacterial diversity associated with microbial mats, gypsum evaporites and carbonate microbialites in thalassic wetlands: Tebenquiche and La Brava, Salar de Atacama, Chile
|
|---|---|
| Published in |
Extremophiles, January 2014
|
| DOI | 10.1007/s00792-013-0617-6 |
| Pubmed ID | |
| Authors |
M. E. Farías, M. Contreras, M. C. Rasuk, D. Kurth, M. R. Flores, D. G. Poiré, F. Novoa, P. T. Visscher |
| Abstract |
In this paper, we report the presence of sedimentary microbial ecosystems in wetlands of the Salar de Atacama. These laminated systems, which bind, trap and precipitate mineral include: microbial mats at Laguna Tebenquiche and Laguna La Brava, gypsum domes at Tebenquiche and carbonate microbialites at La Brava. Microbial diversity and key biogeochemical characteristics of both lakes (La Brava and Tebenquiche) and their various microbial ecosystems (non-lithifying mats, flat and domal microbialites) were determined. The composition and abundance of minerals ranged from trapped and bound halite in organic-rich non-lithifying mats to aragonite-dominated lithified flat microbialites and gypsum in lithified domal structures. Pyrosequencing of the V4 region of the 16s rDNA gene showed that Proteobacteria comprised a major phylum in all of the microbial ecosystems studied, with a marked lower abundance in the non-lithifying mats. A higher proportion of Bacteroidetes was present in Tebenquiche sediments compared to La Brava samples. The concentration of pigments, particularly that of Chlorophyll a, was higher in the Tebenquiche than in La Brava. Pigments typically associated with anoxygenic phototrophic bacteria were present in lower amounts. Organic-rich, non-lithifying microbial mats frequently formed snake-like, bulbous structures due to gas accumulation underneath the mat. We hypothesize that the lithified microbialites might have developed from these snake-like microbial mats following mineral precipitation in the surface layer, producing domes with endoevaporitic communities in Tebenquiche and carbonate platforms in La Brava. Whereas the potential role of microbes in carbonate platforms is well established, the contribution of endoevaporitic microbes to formation of gypsum domes needs further investigation. |
Mendeley readers
The data shown below were compiled from readership statistics for 171 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Mexico | 2 | 1% |
| Chile | 2 | 1% |
| Germany | 1 | <1% |
| Switzerland | 1 | <1% |
| Canada | 1 | <1% |
| United States | 1 | <1% |
| Unknown | 163 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 32 | 19% |
| Researcher | 29 | 17% |
| Student > Doctoral Student | 18 | 11% |
| Student > Master | 15 | 9% |
| Student > Bachelor | 14 | 8% |
| Other | 25 | 15% |
| Unknown | 38 | 22% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 37 | 22% |
| Earth and Planetary Sciences | 29 | 17% |
| Environmental Science | 23 | 13% |
| Biochemistry, Genetics and Molecular Biology | 14 | 8% |
| Immunology and Microbiology | 6 | 4% |
| Other | 17 | 10% |
| Unknown | 45 | 26% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 May 2016.
All research outputs
#19,288,747
of 23,876,482 outputs
Outputs from Extremophiles
#638
of 791 outputs
Outputs of similar age
#234,537
of 310,842 outputs
Outputs of similar age from Extremophiles
#10
of 11 outputs
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