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DOI | 10.1038/s41598-019-38744-y |
Sources and selection of snow-specific microbial communities in a Greenlandic sea ice snow cover | |
Maccario, Lorrie1,2; Carpenter, Shelly D.3; Deming, Jody W.3; Vogel, Timothy M.1; Larose, Catherine1 | |
发表日期 | 2019 |
ISSN | 2045-2322 |
卷号 | 9 |
英文摘要 | Sea ice and its snow cover are critical for global processes including climate regulation and biogeochemical cycles. Despite an increase in studies focused on snow microorganisms, the ecology of snow inhabitants remains unclear. In this study, we investigated sources and selection of a snowpack-specific microbial community by comparing metagenomes from samples collected in a Greenlandic fjord within a vertical profile including atmosphere, snowpack with four distinct layers of snow, sea ice brine and seawater. Microbial communities in all snow layers derived from mixed sources, both marine and terrestrial, and were more similar to atmospheric communities than to sea ice or seawater communities. The surface snow metagenomes were characterized by the occurrence of genes involved in photochemical stress resistance, primary production and metabolism of diverse carbon sources. The basal saline snow layer that was in direct contact with the sea ice surface harbored a higher abundance of cells than the overlying snow layers, with a predominance of Alteromonadales and a higher relative abundance of marine representatives. However, the overall taxonomic structure of the saline layer was more similar to that of other snow layers and the atmosphere than to underlying sea ice and seawater. The expulsion of relatively nutrient-rich sea ice brine into basal snow might have stimulated the growth of copiotrophic psychro- and halotolerant snow members. Our study indicates that the size, composition and function of snowpack microbial communities over sea ice were influenced primarily by atmospheric deposition and inflow of sea ice brine and that they form a snow-specific assemblage reflecting the particular environmental conditions of the snowpack habitat. |
WOS研究方向 | Science & Technology - Other Topics |
来源期刊 | SCIENTIFIC REPORTS
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/93577 |
作者单位 | 1.Ecole Cent Lyon, CNRS, Lab Ampere, Environm Microbial Genom, Ecully, France; 2.Univ Copenhagen, Dept Biol, Microbiol Sect, Copenhagen, Denmark; 3.Univ Washington, Sch Oceanog, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Maccario, Lorrie,Carpenter, Shelly D.,Deming, Jody W.,et al. Sources and selection of snow-specific microbial communities in a Greenlandic sea ice snow cover[J],2019,9. |
APA | Maccario, Lorrie,Carpenter, Shelly D.,Deming, Jody W.,Vogel, Timothy M.,&Larose, Catherine.(2019).Sources and selection of snow-specific microbial communities in a Greenlandic sea ice snow cover.SCIENTIFIC REPORTS,9. |
MLA | Maccario, Lorrie,et al."Sources and selection of snow-specific microbial communities in a Greenlandic sea ice snow cover".SCIENTIFIC REPORTS 9(2019). |
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