气候变化领域集成服务门户(CCPortal): Bacteriohopanepolyols across environmental gradients in Lake Vanda, Antarctica

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DOI	10.1111/gbi.12335
	Bacteriohopanepolyols across environmental gradients in Lake Vanda, Antarctica
	Matys E.D.; Mackey T.; Grettenberger C.; Mueller E.; Sumner D.Y.; Hawes I.; Summons R.E.
发表日期	2019
ISSN	14724677
起始页码	308
结束页码	319
卷号	17 期号:3
英文摘要	Bacteriohopanepolyols (BHPs) are bacterial membrane lipids that may be used as biological or environmental biomarkers. Previous studies have described the diversity, distribution, and abundance of BHPs in a variety of modern environments. However, the regulation of BHP production in polar settings is not well understood. Benthic microbial mats from ice-covered lakes of the McMurdo Dry Valleys, Antarctica provide an opportunity to investigate the sources, physiological roles, and preservation of BHPs in high-latitude environments. Lake Vanda is one of the most stable lakes on Earth, with microbial communities occupying specific niches along environmental gradients. We describe the influence of mat morphology and local environmental conditions on the diversity and distribution of BHPs and their biological sources in benthic microbial mats from Lake Vanda. The abundance and diversity of C-2 methylated hopanoids (2-MeBHP) are of particular interest, given that their stable degradation products, 2-methylhopanes, are among the oldest and most prevalent taxonomically informative biomarkers preserved in sedimentary rocks. Furthermore, the interpretation of sedimentary 2-methylhopanes is of great interest to the geobiology community. We identify cyanobacteria as the sole source of 2-MeBHP in benthic microbial mats from Lake Vanda and assess the hypothesis that 2-MeBHP are regulated in response to a particular environmental variable, namely solar irradiance. © 2019 John Wiley & Sons Ltd
关键词	alcohol alkane bacterium benthos biomarker cyanobacterium environmental conditions environmental gradient ice cover lipid microbial community microbial mat morphology niche sedimentary rock Antarctica East Antarctica Lake Vanda McMurdo Dry Valleys Bacteria (microorganisms)Cyanobacteria membrane lipid Antarctica chemistry cyanobacterium environment ice cover isolation and purification lake metabolism microbiology Antarctic Regions Cyanobacteria Environment Ice Cover Lakes Membrane Lipids
语种	英语
来源机构	Geobiology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133233
推荐引用方式 GB/T 7714	Matys E.D.,Mackey T.,Grettenberger C.,et al. Bacteriohopanepolyols across environmental gradients in Lake Vanda, Antarctica[J]. Geobiology,2019,17(3).
APA	Matys E.D..,Mackey T..,Grettenberger C..,Mueller E..,Sumner D.Y..,...&Summons R.E..(2019).Bacteriohopanepolyols across environmental gradients in Lake Vanda, Antarctica.,17(3).
MLA	Matys E.D.,et al."Bacteriohopanepolyols across environmental gradients in Lake Vanda, Antarctica".17.3(2019).