干旱区生态环境知识资源中心(Arid): Extremophile hypolithic communities in the Vestfold Hills, East Antarctica

Arid

DOI	10.1017/S0954102023000408
	Extremophile hypolithic communities in the Vestfold Hills, East Antarctica
	Clarke, Laurence J.; Raes, Eric J.; Travers, Toby; Virtue, Patti; Bergstrom, Dana M.
通讯作者	Clarke, LJ
来源期刊	ANTARCTIC SCIENCE
ISSN	0954-1020
EISSN	1365-2079
出版年	2024
卷号	36 期号:1 页码:20-36
英文摘要	The Vestfold Hills are a 400 km2, isolated ice-free oasis in eastern Antarctica featuring large areas with translucent quartz rocks that provide habitat for hypolithic microbial communities underneath. We used high-throughput DNA sequencing of 16S and 18S ribosomal RNA amplicons to characterize bacterial and eukaryotic hypolithic communities across the Vestfold Hills. We found high-level, local heterogeneity in community structure consistent with limited dispersal between hypoliths. Hypolithic communities were dominated by heterotrophic Bacteroidetes (mean bacterial relative read abundance: 56%) as well as Cyanobacteria (35%), with the eukaryote component often dominated by Chlorophyta (43%). Small but significant proportions of the variation in microbial community composition and function were explained by soil salinity (5-7%) and water availability (8-11%), with distinct taxa associated with different salinities and water availabilities. Furthermore, many inferred bacterial metabolic pathways were enriched in hypolithic communities from either dry or high-salinity sites. Vestfold Hills hypolithic habitats are likely to be local refuges for bacterial and eukaryotic diversity. Gradients in soil salinity and water availability across the Vestfold Hills, in addition to the number and diversity of lake types and fjords as potential source populations, may contribute to the observed variation in the extremophile, hypolithic microbial community composition.
英文关键词	16S/18S ribosomal RNA gene bacteria Cyanobacteria dispersal limitation eukaryote high-throughput DNA sequencing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001190399800001
WOS关键词	MICROBIAL COMMUNITIES ; DRY VALLEYS ; DIVERSITY ; ECOLOGY ; SEQUENCES ; BACTERIA ; DATABASE ; PACKAGE ; ROCKS ; TIME
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402835
推荐引用方式 GB/T 7714	Clarke, Laurence J.,Raes, Eric J.,Travers, Toby,et al. Extremophile hypolithic communities in the Vestfold Hills, East Antarctica[J],2024,36(1):20-36.
APA	Clarke, Laurence J.,Raes, Eric J.,Travers, Toby,Virtue, Patti,&Bergstrom, Dana M..(2024).Extremophile hypolithic communities in the Vestfold Hills, East Antarctica.ANTARCTIC SCIENCE,36(1),20-36.
MLA	Clarke, Laurence J.,et al."Extremophile hypolithic communities in the Vestfold Hills, East Antarctica".ANTARCTIC SCIENCE 36.1(2024):20-36.