干旱区生态环境知识资源中心(Arid): Assessing the potential of n-alkyl amides and n-alkyl nitriles in the arid sedimentary strata of northwestern China as environmental indicators

Arid

DOI	10.1016/j.scitotenv.2024.175688
	Assessing the potential of n-alkyl amides and n-alkyl nitriles in the arid sedimentary strata of northwestern China as environmental indicators
	Pu, Yang; Kang, Hong; Meyers, Philip A.; Zhang, Hucai; Yang, Mingsheng
通讯作者	Pu, Y
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	951
英文摘要	Recent advancements in the application of lipid biomarkers as paleoenvironmental indicators have provided invaluable insights into the dynamics of climatic variations, vegetative histories, and anthropogenic impacts. However, our current understanding of nitrogen-containing lipid biomarkers (NCLBs) in sedimentary deposits remains limited, notwithstanding their potential significance in global nitrogen cycling. To bridge this research gap, a comprehensive study was conducted to characterize the distribution patterns of n-alkyl amides (NAAs) and n-alkyl nitriles (NANs) in representative paleo-lake and loess sedimentary profiles from the arid region of northwestern China (NWC). The widespread occurrence of these NCLBs across late Quaternary strata, with distinct distribution patterns observed in various settings, suggests their formation under diverse environmental conditions. The prevalence of NAAs in arid sedimentary deposits can primarily be attributed to the diverse array of local biota, including vascular plants, algae, and fungi, rather than being solely associated with biomass burning, as commonly assumed. Furthermore, the distribution patterns of NANs closely align with those of NAAs, indicating their formation through thermally induced dehydration of precursor NAAs. Both groups of NCLBs exhibit significant preservation potential in sediments within NWC, which is believed to be intimately linked to the region's arid and cold climate as well as its neutral or weakly alkaline depositional setting. These findings underscore the prospective use of NAAs as indicators of environmental changes and NANs as potential markers of past fire-related activities, making them valuable tools for paleoenvironmental reconstructions of late Quaternary strata, especially in arid, cold, and weakly alkaline regions.
英文关键词	Northwestern China (NWC) Nitrogen-containing lipid biomarkers (NCLBs) N- alkyl amides (NAAs) N- alkyl nitriles (NANs) Loess Paleolake sediment Environmental change
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001303338900001
WOS关键词	FATTY-ACIDS ; TIBETAN PLATEAU ; ORGANIC AEROSOL ; OIL SHALES ; DISTRIBUTIONS ; EVOLUTION ; NITROGEN ; RECORDS ; ORIGIN ; STRATIGRAPHY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405539
推荐引用方式 GB/T 7714	Pu, Yang,Kang, Hong,Meyers, Philip A.,et al. Assessing the potential of n-alkyl amides and n-alkyl nitriles in the arid sedimentary strata of northwestern China as environmental indicators[J],2024,951.
APA	Pu, Yang,Kang, Hong,Meyers, Philip A.,Zhang, Hucai,&Yang, Mingsheng.(2024).Assessing the potential of n-alkyl amides and n-alkyl nitriles in the arid sedimentary strata of northwestern China as environmental indicators.SCIENCE OF THE TOTAL ENVIRONMENT,951.
MLA	Pu, Yang,et al."Assessing the potential of n-alkyl amides and n-alkyl nitriles in the arid sedimentary strata of northwestern China as environmental indicators".SCIENCE OF THE TOTAL ENVIRONMENT 951(2024).