Arid
DOI10.3389/fmicb.2017.01435
Microbial Community Structure and the Persistence of Cyanobacterial Populations in Salt Crusts of the Hyperarid Atacama Desert from Genome-Resolved Metagenomics
Finstad, Kari M.1,5; Probst, Alexander J.2; Thomas, Brian C.2; Andersen, Gary L.1,3; Demergasso, Cecilia4; Echeverria, Alex4; Amundson, Ronald G.1; Banfield, Jillian F.1,2
通讯作者Banfield, Jillian F.
来源期刊FRONTIERS IN MICROBIOLOGY
ISSN1664-302X
出版年2017
卷号8
英文摘要

Although once thought to be devoid of biology, recent studies have identified salt deposits as oases for life in the hyperarid Atacama Desert. To examine spatial patterns of microbial species and key nutrient sources, we genomically characterized 26 salt crusts from three sites along a fog gradient. The communities are dominated by a large variety of Halobacteriales and Bacteroidetes, plus a few algal and Cyanobacterial species. CRISPR locus analysis suggests the distribution of a single Cyanobacterial population among all sites. This is in stark contrast to the extremely high sample specificity of most other community members. Only present at the highest moisture site is a genomically characterized Thermoplasmatales archaeon (Marine Group II) and six Nanohaloarchaea, one of which is represented by a complete genome. Parcubacteria (OD1) and Saccharibacteria (TM7), not previously reported from hypersaline environments, were found at low abundances. We found no indication of a N-2 fixation pathway in the communities, suggesting acquisition of bioavailable nitrogen from atmospherically derived nitrate. Samples cluster by site based on bacterial and archaeal abundance patterns and photosynthetic capacity decreases with increasing distance from the ocean. We conclude that moisture level, controlled by coastal fog intensity, is the strongest driver of community membership.


英文关键词metagenome Atacama Desert salt crust hyperarid hypersaline environmental genomics salar
类型Article
语种英语
国家USA ; Chile
收录类别SCI-E
WOS记录号WOS:000406463100001
WOS关键词CHILE ; LIFE ; ENVIRONMENTS ; COLONIZATION ; BACTERIA ; VIRUSES ; ARCHAEA ; SHIFTS ; HOT
WOS类目Microbiology
WOS研究方向Microbiology
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199054
作者单位1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;
2.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA;
3.Lawrence Berkeley Natl Lab, Earth Sci Div, Ecol Dept, Berkeley, CA USA;
4.Univ Catolic Norte, Ctr Biotecnol, Antofagasta, Chile;
5.Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA USA
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Finstad, Kari M.,Probst, Alexander J.,Thomas, Brian C.,et al. Microbial Community Structure and the Persistence of Cyanobacterial Populations in Salt Crusts of the Hyperarid Atacama Desert from Genome-Resolved Metagenomics[J]. University of California, Berkeley,2017,8.
APA Finstad, Kari M..,Probst, Alexander J..,Thomas, Brian C..,Andersen, Gary L..,Demergasso, Cecilia.,...&Banfield, Jillian F..(2017).Microbial Community Structure and the Persistence of Cyanobacterial Populations in Salt Crusts of the Hyperarid Atacama Desert from Genome-Resolved Metagenomics.FRONTIERS IN MICROBIOLOGY,8.
MLA Finstad, Kari M.,et al."Microbial Community Structure and the Persistence of Cyanobacterial Populations in Salt Crusts of the Hyperarid Atacama Desert from Genome-Resolved Metagenomics".FRONTIERS IN MICROBIOLOGY 8(2017).
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