气候变化领域集成服务门户(CCPortal): Inverse hydrogen isotope fractionation indicates heterotrophic microbial production of long-chain n-alkyl lipids in desolate Antarctic ponds

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DOI	10.1111/gbi.12441
	Inverse hydrogen isotope fractionation indicates heterotrophic microbial production of long-chain n-alkyl lipids in desolate Antarctic ponds
	Chen, Xin; Liu, Xiaodong; Jia, Hongzeng; Jin, Jing; Kong, Weidong; Huang, Yongsong
通讯作者	Liu, XD (通讯作者)
发表日期	2021
ISSN	1472-4677
EISSN	1472-4669
起始页码	394
结束页码	404
卷号	19 期号:4
英文摘要	Long-chain (>C-25) n-alkyl lipids have long been considered biomarkers for higher plant leaf waxes and widely applied for paleoclimate and paleoenvironmental reconstructions. However, recent experimental and lacustrine sediment studies suggest long-chain n-alkanes and n-alkanoic acids can also be produced by aerobic microbes, probably heterotrophic microbes based on carbon isotope data. Here we show that sedimentary long-chain n-alkanes and n-alkanoic acids in two desolate Antarctic ponds where vascular plants are absent in the surroundings display hydrogen isotopic values up to 300 per mil higher than those of lake water. It is the first time that such strongly inverse or reduced hydrogen isotopic fractionation of lipid biomarkers is observed in natural sediment samples. Based on recent extensive experimental data on microbial hydrogen isotopic fractionation, our data can only be explained by the predominant production of long-chain n-alkanes and n-alkanoic acids from heterotrophic micro-organisms. Together with preliminary 16S rRNA gene sequencing data, our results represent the first unambiguous example of predominant heterotrophic microbial production of long-chain n-alkyl waxes in a natural environment.
英文关键词	East Antarctic ponds; heterotrophic microbes; inverse hydrogen isotopic fractionation; n‐ alkanes; n‐ alkanoic acids
语种	英语
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Geology
WOS类目	Biology ; Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000636037100001
来源期刊	GEOBIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260199
推荐引用方式 GB/T 7714	Chen, Xin,Liu, Xiaodong,Jia, Hongzeng,et al. Inverse hydrogen isotope fractionation indicates heterotrophic microbial production of long-chain n-alkyl lipids in desolate Antarctic ponds[J]. 中国科学院青藏高原研究所,2021,19(4).
APA	Chen, Xin,Liu, Xiaodong,Jia, Hongzeng,Jin, Jing,Kong, Weidong,&Huang, Yongsong.(2021).Inverse hydrogen isotope fractionation indicates heterotrophic microbial production of long-chain n-alkyl lipids in desolate Antarctic ponds.GEOBIOLOGY,19(4).
MLA	Chen, Xin,et al."Inverse hydrogen isotope fractionation indicates heterotrophic microbial production of long-chain n-alkyl lipids in desolate Antarctic ponds".GEOBIOLOGY 19.4(2021).