干旱区生态环境知识资源中心(Arid): Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period

Arid

DOI	10.3389/fmicb.2019.01641
	Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period
	Angel Fernandez-Martinez, Miguel 1; dos Santos Severino, Rita 1; Moreno-Paz, Mercedes 1; Gallardo-Carreno, Ignacio 1; Blanco, Yolanda 1; Warren-Rhodes, Kimberley 2,3; Garcia-Villadangos, Miriam 1; Ruiz-Bermejo, Marta 1; Barberan, Albert 4; Wettergreen, David 5; Cabrol, Nathalie 2,3; Parro, Victor 1
通讯作者	Angel Fernandez-Martinez, Miguel
来源期刊	FRONTIERS IN MICROBIOLOGY
EISSN	1664-302X
出版年	2019
卷号	10
英文摘要	The Atacama Desert, the oldest and driest desert on Earth, displays significant rains only once per decade. To investigate how microbial communities take advantage of these sporadic wet events, we carried out a geomicrobiological study a few days after a heavy rain event in 2015. Different physicochemical and microbial community analyses were conducted on samples collected from playas and an alluvial fan from surface, 10, 20, 50, and 80 cm depth. Gravimetric moisture content peaks were measured in 10 and 20 cm depth samples (from 1.65 to 4.1% w/w maximum values) while, in general, main anions such as chloride, nitrate, and sulfate concentrations increased with depth, with maximum values of 13-1,125; 168-10,109; and 9,904-30,952 ppm, respectively. Small organic anions such as formate and acetate had maximum concentrations from 2.61 to 3.44 ppm and 6.73 to 28.75 ppm, respectively. Microbial diversity inferred from DNA analysis showed Actinobacteria and Alphaproteobacteria as the most abundant and widespread bacterial taxa among the samples, followed by Chloroflexi and Firmicutes at specific sites. Archaea were mainly dominated by Nitrososphaerales, Methanobacteria, with the detection of other groups such as Halobacteria. Metaproteomics showed a high and even distribution of proteins involved in primary metabolic processes such as energy production and biosynthetic pathways, and a limited but remarkable presence of proteins related to resistance to environmental stressors such as radiation, oxidation, or desiccation. The results indicated that extra humidity in the system allows the microbial community to repair, and prepare for the upcoming hyperarid period. Additionally, it supplies biomarkers to the medium whose preservation potential could be high under strong desiccation conditions and relevant for planetary exploration.
英文关键词	microbial ecology Atacama Desert playa rainfall event subsurface environments high-throughput DNA sequencing metaproteomics immunoassay microarrays
类型	Article
语种	英语
国家	Spain ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000476968100001
WOS关键词	SOIL MICROBIAL COMMUNITIES ; MOJAVE DESERT ; BACTERIAL COMMUNITIES ; BIOMARKERS ; ARIDITY ; ENVIRONMENT ; MICROARRAY ; SURFACE ; LIFE ; MARS
WOS类目	Microbiology
WOS研究方向	Microbiology
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215803
作者单位	1.CSIC INTA, Ctr Astrobiol CAB, Madrid, Spain; 2.SETT Inst, Carl Sagan Ctr, Mountain View, CA USA; 3.NASA, Ames Res Ctr, Mountain View, CA USA; 4.Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ USA; 5.Carnegie Mellon Univ, Robot Inst, Pittsburgh, PA 15213 USA
推荐引用方式 GB/T 7714	Angel Fernandez-Martinez, Miguel,dos Santos Severino, Rita,Moreno-Paz, Mercedes,et al. Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period[J]. University of Arizona,2019,10.
APA	Angel Fernandez-Martinez, Miguel.,dos Santos Severino, Rita.,Moreno-Paz, Mercedes.,Gallardo-Carreno, Ignacio.,Blanco, Yolanda.,...&Parro, Victor.(2019).Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period.FRONTIERS IN MICROBIOLOGY,10.
MLA	Angel Fernandez-Martinez, Miguel,et al."Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period".FRONTIERS IN MICROBIOLOGY 10(2019).