气候变化领域集成服务门户(CCPortal): Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes

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DOI	10.1073/pnas.1805186115
	Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes
	Weber Y.; Damsté J.S.S.; Zopfi J.; De Jonge C.; Gilli A.; Schubert C.J.; Lepori F.; Lehmann M.F.; Niemann H.
发表日期	2018
ISSN	0027-8424
起始页码	10926
结束页码	10931
卷号	115 期号:43
英文摘要	Terrestrial paleoclimate archives such as lake sediments are essential for our understanding of the continental climate system and for the modeling of future climate scenarios. However, quantitative proxies for the determination of paleotemperatures are sparse. The relative abundances of certain bacterial lipids, i.e., branched glycerol dialkyl glycerol tetraethers (brGDGTs), respond to changes in environmental temperature, and thus have great potential for climate reconstruction. Their application to lake deposits, however, is hampered by the lack of fundamental knowledge on the ecology of brGDGT-producing microbes in lakes. Here, we show that brGDGTs are synthesized by multiple groups of bacteria thriving under contrasting redox regimes in a deep meromictic Swiss lake (Lake Lugano). This niche partitioning is evidenced by highly distinct brGDGT inventories in oxic vs. anoxic watermasses, and corresponding vertical patterns in bacterial 16S rRNA gene abundances, implying that sedimentary brGDGT records are affected by temperatureindependent changes in the community composition of their microbial producers. Furthermore, the stable carbon isotope composition (δ13C) of brGDGTs in Lake Lugano and 34 other (peri-)Alpine lakes attests to the widespread heterotrophic incorporation of 13C-depleted, methane-derived biomass at the redox transition zone of mesotrophic to eutrophic lake systems. The brGDGTs produced under such hypoxic/ methanotrophic conditions reflect near-bottom water temperatures, and are characterized by comparatively low δ13C values. Depending on climate zone and water depth, lake sediment archives predominated by deeper water/low-13C brGDGTsmay providemore reliable records of climate variability than those where brGDGTs derive from terrestrial and/or aquatic sources with distinct temperature imprints. © 2018 National Academy of Sciences. All rights reserved.
英文关键词	D13C; GDGT; Lakes; Microbial ecology; Paleoclimate
语种	英语
scopus关键词	branched glycerol dialkyl glycerol tetraether derivative; carbon; carbon 13; ether lipid; glycerol; methane; RNA 16S; unclassified drug; glycerol; lipid; Article; biomass; climate change; depletion; lake; lake sediment; microbial community; oxidation reduction reaction; population abundance; priority journal; synthesis; water sampling; water temperature; bacterium; chemistry; ecology; lake; metabolism; microbiology; oxidation reduction reaction; sediment; Bacteria; Biomass; Carbon; Carbon Isotopes; Ecology; Geologic Sediments; Glycerol; Lakes; Lipids; Methane; Oxidation-Reduction; RNA, Ribosomal, 16S
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160452
作者单位	Weber, Y., Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland, Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; Damsté, J.S.S., Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research, Utrecht University, Den Burg, 1790 AB, Netherlands, Faculty of Geosciences, Department of Earth Sciences, Geochemistry, Utrecht University, Utrecht, 3584 CD, Netherlands; Zopfi, J., Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland; De Jonge, C., Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research, Utrecht University, Den Burg, 1790 AB, Netherlands, Research Group of Plant and Ecosystems, Department of Biology, University of Antwerp, Wilrijk, B-2610, Belgium; Gilli, A., Geological Institute, ETH Zurich, Zurich, 8092, Switzerland; Schubert, C.J., Department of Surface Waters - Research and Management, Swiss Federal In...
推荐引用方式 GB/T 7714	Weber Y.,Damsté J.S.S.,Zopfi J.,et al. Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes[J],2018,115(43).
APA	Weber Y..,Damsté J.S.S..,Zopfi J..,De Jonge C..,Gilli A..,...&Niemann H..(2018).Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes.Proceedings of the National Academy of Sciences of the United States of America,115(43).
MLA	Weber Y.,et al."Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes".Proceedings of the National Academy of Sciences of the United States of America 115.43(2018).