干旱区生态环境知识资源中心(Arid): Soil pH Dominates the Distributions of Both 5-and 6-Methyl Branched Tetraethers in Arid Regions

Arid

DOI	10.1029/2019JG005356
	Soil pH Dominates the Distributions of Both 5-and 6-Methyl Branched Tetraethers in Arid Regions
	Duan, Yanwu; Sun, Qing; Werne, Josef P.; Yang, Huan; Jia, Jia; Wang, Leibin; Xie, Haichao; Chen, Fahu
通讯作者	Duan, YW
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2020
卷号	125 期号:10
英文摘要	Branched glycerol dialkyl glycerol tetraether (brGDGT)-based indices are increasingly used for quantitative mean annual air temperature (MAAT) and soil pH reconstructions. However, large scatter in the relationship between the methylation index of 5-methyl brGDGTs (MBT '(5ME)) and MAAT still exists in arid and/or cold regions, and specific reasons for that offset remain unclear. Here, we present the brGDGT distributions from 18 soil samples along an altitudinal transect spanning a large gradient in MAAT at Mount (Mt.) Tienshan in arid central Asia, which we compare with previously published data from 256 globally distributed soils. Our results indicate that a dramatic increase of brGDGT concentrations occurs at 2,500 m above sea level for the soils from Mt. Tienshan, and a different pattern of brGDGT distributions in response to environmental changes appears below and above this elevation. Soil pH is observed to control the distributions of both 5- and 6-methyl brGDGTs in the soils from Mt. Tienshan and other arid regions. Importantly, we find that the fractional abundances of the 5-methyl isomers of pentamethylated and hexamethylated brGDGTs (IIa, IIIa) show a distinct negative correlation with soil pH, and the noncyclopentane-containing tetra-methylated brGDGT (Ia) is not related to MAAT in arid soils, which can explain the remaining temperature offset of reconstructed MAAT based on the MBT '(5ME) index in arid regions. In addition, our data suggest that either the brGDGT-producing community differs or brGDGT-producers respond differently to temperature in arid relative to moist soils.
英文关键词	soil pH brGDGT distributions MBT′ (5ME) microbial community
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000586701500008
WOS关键词	DIALKYL GLYCEROL TETRAETHERS ; HOLOCENE MOISTURE EVOLUTION ; CENTRAL-ASIA ; ENVIRONMENTAL CONTROLS ; MONSOON PRECIPITATION ; SUMMER PRECIPITATION ; EXPERIMENTAL DROUGHT ; MEMBRANE-LIPIDS ; TIBETAN PLATEAU ; CARBON-DIOXIDE
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	兰州大学 ; 中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327375
作者单位	[Duan, Yanwu; Xie, Haichao; Chen, Fahu] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing, Peoples R China; [Duan, Yanwu; Jia, Jia; Wang, Leibin; Chen, Fahu] Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou, Peoples R China; [Sun, Qing] Minist Nat Resources, Key Lab Ecogeochem, Natl Res Ctr Geoanal, Beijing, Peoples R China; [Werne, Josef P.] Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA USA; [Yang, Huan] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Duan, Yanwu,Sun, Qing,Werne, Josef P.,et al. Soil pH Dominates the Distributions of Both 5-and 6-Methyl Branched Tetraethers in Arid Regions[J]. 兰州大学, 中国科学院青藏高原研究所,2020,125(10).
APA	Duan, Yanwu.,Sun, Qing.,Werne, Josef P..,Yang, Huan.,Jia, Jia.,...&Chen, Fahu.(2020).Soil pH Dominates the Distributions of Both 5-and 6-Methyl Branched Tetraethers in Arid Regions.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(10).
MLA	Duan, Yanwu,et al."Soil pH Dominates the Distributions of Both 5-and 6-Methyl Branched Tetraethers in Arid Regions".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.10(2020).