气候变化领域集成服务门户(CCPortal): An evaluation of biological and climatic effects on plant n-alkane distributions and delta H-2(alk) in a field experiment conducted in central Tibet

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DOI	10.1016/j.orggeochem.2019.06.003
	An evaluation of biological and climatic effects on plant n-alkane distributions and delta H-2(alk) in a field experiment conducted in central Tibet
	Bai, Yan; Azamdzhon, Murodov; Wang, Shiping; Fang, Xiaomin; Guo, Haichao; Zhou, Pengchao; Chen, Chihao; Liu, Xiaomin; Jia, Shugang; Wang, Qi
通讯作者	Bai, Y (通讯作者)
发表日期	2019
ISSN	0146-6380
EISSN	1873-5290
起始页码	53
结束页码	63
卷号	135
英文摘要	The distributions of long chain n-alkanes and their hydrogen isotope values (delta H-2(alk)) can be used to investigate paleoclimatic changes, but, as yet, the degree to which plant types, temperature and/or hydrology may drive such variations, cannot be discriminated. Seven co-occurring herbaceous plants (angiosperms) were studied in climate-controlled growing conditions in an open-top chamber located in Naqu, Tibet, in 2015 and 2017, using generalized n-alkane parameters, viz. n-alkane concentrations (Conc(alk)), the carbon preference index (CPI) and the average chain length (ACL), and delta H-2(alk) values. These plants were subjected to warming (W, spanning a < 4 degrees C mean annual temperature (MAT) gradient) and the amount of water that plants received (100% precipitation differences) conditions in 2015 and 2017, respectively. Growth experiments showed that: (1) No significant relationships were found between n-alkane parameters (Conc(alk), ACL and CPI) and temperature (a 4 degrees C difference) or precipitation (100% precipitation differences); (2) The delta H-2(alk) increased ca. 10-30 parts per thousand during W 4 degrees C conditions, with differences in the sensitivity of responses to W between different species. During P treatments, the variability in delta H-2(alk) values was close to that caused by a W 4 degrees C response; and 3) the interspecies variability in n-alkane distributions and delta H-2(alk) (ca. 30-50 parts per thousand) was higher than that caused by these P and W responses. These results highlight the importance of the potential impact of any changes in the floral assemblage when interpreting sedimentary n-alkane distributions and delta H-2(alk) records. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	DELTA-D VALUES HYDROGEN ISOTOPE RATIOS LIPID BIOMARKERS SURFACE SOILS PLATEAU HOLOCENE FOREST RECONSTRUCTION FRACTIONATION TEMPERATURE
英文关键词	n-Alkanes; Hydrogen isotope; Temperature; Precipitation; Tibet; Angiosperms
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000477817100006
来源期刊	ORGANIC GEOCHEMISTRY
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/259472
推荐引用方式 GB/T 7714	Bai, Yan,Azamdzhon, Murodov,Wang, Shiping,et al. An evaluation of biological and climatic effects on plant n-alkane distributions and delta H-2(alk) in a field experiment conducted in central Tibet[J]. 中国科学院青藏高原研究所,2019,135.
APA	Bai, Yan.,Azamdzhon, Murodov.,Wang, Shiping.,Fang, Xiaomin.,Guo, Haichao.,...&Wang, Qi.(2019).An evaluation of biological and climatic effects on plant n-alkane distributions and delta H-2(alk) in a field experiment conducted in central Tibet.ORGANIC GEOCHEMISTRY,135.
MLA	Bai, Yan,et al."An evaluation of biological and climatic effects on plant n-alkane distributions and delta H-2(alk) in a field experiment conducted in central Tibet".ORGANIC GEOCHEMISTRY 135(2019).