Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau

doi:10.1007/s11430-016-5271-2

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	Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau
	Dai GuoHua ; Zhu ShanShan ; Liu ZongGuang ; Chen LiTong 2; He JinSheng 2,3; Feng XiaoJuan
刊名	SCIENCE CHINA-EARTH SCIENCES
	2016
卷号	59 期号:7
关键词	Qinghai-Tibetan Plateau Soil organic matter Biomarker Fatty acids Distribution sources
ISSN号	1674-7313
DOI	10.1007/s11430-016-5271-2
文献子类	Article
英文摘要	As an important biomarker, fatty acids (FAs) have been extensively used to trace the origin of organic matter in sediments and soils. However, studies of the distribution and abundance of FAs in alpine grassland soils are still rare, especially on the Qinghai-Tibetan Plateau (QTP), the highest plateau in the world, which contributes sediments to many large rivers in Asia. This study investigates the composition, distribution and source of FAs with increasing soil depths from 17 typical alpine grassland sites in the QTP. The most abundant FAs included the ubiquitous C-16 FA and even-numbered long-chain FAs (C-20-C-30), indicating mixed inputs from microbial and higher plant sources. Source apportionment showed that higher plants were the dominant contributor of FAs (approximately 40%) in QTP soils. The abundance of FAs decreased with soil depth, with the highest value (1.08 +/- 0.09 mg/g OC) at a 0-10 cm depth and the lowest value (0.46 +/- 0.12 mg/g OC) at a 50-70 cm depth, due to much lower plant inputs into the deeper horizons. The total concentration of FAs was negatively correlated to the mean annual temperature (MAT; P < 0.05) and soil pH (P < 0.01), suggesting that the preservation of FAs was favored in low-MAT and low-pH soils on the QTP. The abundance of fresh OC source FAs increased significantly with the mean annual precipitation (MAP; P < 0.05), indicating that high MAP facilitates the accumulation of fresh FAs in QTP soils. Other environmental parameters, such as the soil mineral content (aluminum and iron oxide), microbial community composition as well as litter quality and quantity, may also exert a strong control on the preservation of FAs in QTP soils and warrant further research to better understand the mechanisms responsible for the preservation of FAs in QTP soils.
学科主题	Geosciences, Multidisciplinary
电子版国际标准刊号	1869-1897
出版地	BEIJING
WOS关键词	ORGANIC-MATTER ; EXTRACTABLE LIPIDS ; CARBON ; FOREST ; SEDIMENTS ; PLANT ; DEGRADATION ; BIOMARKERS ; RESIDUES ; ORIGIN
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000379345900002
资助机构	Chinese National Key Development Program for Basic Research [2014CB954003, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31370491, 41503073] ; National 1000 Young Talents Program ; Strategic Priority Research Program-Climate Change: Carbon Budget and Relevant Issues of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050404]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/24467]
专题	植被与环境变化国家重点实验室
作者单位	1.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Dai GuoHua,Zhu ShanShan,Liu ZongGuang,et al. Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2016,59(7).
APA	Dai GuoHua,Zhu ShanShan,Liu ZongGuang,Chen LiTong,He JinSheng,&Feng XiaoJuan.(2016).Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau.SCIENCE CHINA-EARTH SCIENCES,59(7).
MLA	Dai GuoHua,et al."Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau".SCIENCE CHINA-EARTH SCIENCES 59.7(2016).