干旱区生态环境知识资源中心(Arid): Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation

Arid

DOI	10.1016/j.micron.2019.102818
	Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation
	Greenfield, Samuel R.1; Tighe, Scott W.2; Bai, Yu 1; Goerlitz, David S.4; Von Turkovich, Michele 5,6; Taatjes, Douglas J.5,6; Dragon, Julie A.2,3; Johnson, Sarah Stewart 1,7
通讯作者	Greenfield, Samuel R.
来源期刊	MICRON
ISSN	0968-4328
出版年	2020
卷号	131
英文摘要	The extremely cold and arid conditions of Antarctica make it uniquely positioned to investigate fundamental questions regarding the persistence of life in extreme environments. Within the McMurdo Dry Valleys and surrounding mountain ranges are multiple ancient relict lakes, paleolakes, with lacustrine deposits spanning from thousands to millions of years in age. Here we present data from light microscopy, scanning electron microscopy, electron dispersive x-ray spectroscopy, and radiocarbon dating to catalog the remarkable range of life preserved within these deposits. This includes intact microbes and nanobacteria-sized cocci, CaCO3 precipitations consistent with biogenic calcium, previously undescribed net-like structures, possible dormant spores, and long-extinct yet exquisitely preserved non-vascular plants. These images provide an important reference for further microbiome investigations of Antarctic paleolake samples. In addition, these findings may provide a visual reference for the use of subsurface groundwater microbial communities as an analog for paleolake subsurface water on planets such as Mars.
英文关键词	Antarctica Paleolakes Microbes Biosignatures SEM
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000515209100005
WOS关键词	MEMBRANE-VESICLES ; MICROBIAL MATS ; LAKE FRYXELL ; BACTERIA ; DIVERSITY ; CLIMATE ; REGION
WOS类目	Microscopy
WOS研究方向	Microscopy
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315172
作者单位	1.Georgetown Univ, Dept Biol, Washington, DC 20057 USA; 2.Univ Vermont, Vermont Integrat Genom, Burlington, VT 05405 USA; 3.Univ Vermont, Larner Coll Med, Dept Microbiol & Mol Genet, Burlington, VT 05405 USA; 4.Georgetown Univ, Med Ctr, Washington, DC 20057 USA; 5.Dept Pathol & Lab Med, Burlington, VT USA; 6.Univ Vermont, Larner Coll Med, Microscopy Imaging Ctr, Burlington, VT 05405 USA; 7.Georgetown Univ, Sci Technol & Int Affairs Program, Washington, DC 20057 USA
推荐引用方式 GB/T 7714	Greenfield, Samuel R.,Tighe, Scott W.,Bai, Yu,et al. Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation[J],2020,131.
APA	Greenfield, Samuel R..,Tighe, Scott W..,Bai, Yu.,Goerlitz, David S..,Von Turkovich, Michele.,...&Johnson, Sarah Stewart.(2020).Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation.MICRON,131.
MLA	Greenfield, Samuel R.,et al."Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation".MICRON 131(2020).