气候变化领域集成服务门户(CCPortal): Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay, China, since the Late Pleistocene

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DOI	10.1007/s00343-023-2372-6
	Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay, China, since the Late Pleistocene
	Huang, Dongqin; Li, Xiaolong; Li, Zilong; Loh, Pei Sun; Hu, Jianxiong; Chen, Jianfang; Chang, Yuan-Pin; Yang, Chin-Wen; Gao, Qin
发表日期	2024
ISSN	2096-5508
EISSN	2523-3521
英文摘要	A sediment core (YJK19-02) collected from the southern outlet of Hangzhou Bay near the Yongjiang River estuary in East China was analyzed for grain size, lignin, bulk elemental composition, stable carbon isotope, and rare earth elements (REEs) to determine the sources and diagenesis of sedimentary organic matter (OM) of the estuary and adjacent areas since the Late Pleistocene. delta 13C values (-24.80 parts per thousand--23.60 parts per thousand), total organic carbon/total nitrogen (TOC/TN) molar ratios (8.00-12.14), and light rare earth element/heavy rare earth element ratios (LREE/HREE=8.34-8.91) revealed the predominance of terrestrial sources of OM, mainly from the Changjiang (Yangtze) River. The lignin parameters of syringyl/vanillyl (S/V=0.20-0.73) and cinnamyl/vanillyl (C/V=0.03-0.19) ratios indicate the predominance of nonwoody angiosperms, and the vanillic acid/vanillin ratios [(Ad/Al)v=0.32-1.57] indicate medium to high degrees of lignin degradation. An increasing trend of Lambda (total lignin in mg/100-mg OC) values from ca. 14 500 a BP to ca. 11 000 a BP reflected the increase in temperature during the Late Pleistocene. However, a time lag effect of temperature on vegetation abundance was also revealed. The relatively higher and stable Lambda values correspond to the higher temperature during the mid-Holocene from ca. 8 500 a BP to ca. 4 500 a BP. Lambda values decreased from ca. 4 000 a BP to the present, corresponding to historical temperature fluctuations during this time. Our results show that the vegetation abundance in the Yongjiang River Basin since the Late Pleistocene was related to the temperature fluctuation duo to climate change.
英文关键词	Yongjiang River estuary; sedimentary organic matter; lignin; environmental change; Late Pleistocene
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:001220989500001
来源期刊	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290509
作者单位	Zhejiang University; Ministry of Natural Resources of the People's Republic of China; Second Institute of Oceanography, Ministry of Natural Resources; National Sun Yat Sen University
推荐引用方式 GB/T 7714	Huang, Dongqin,Li, Xiaolong,Li, Zilong,et al. Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay, China, since the Late Pleistocene[J],2024.
APA	Huang, Dongqin.,Li, Xiaolong.,Li, Zilong.,Loh, Pei Sun.,Hu, Jianxiong.,...&Gao, Qin.(2024).Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay, China, since the Late Pleistocene.JOURNAL OF OCEANOLOGY AND LIMNOLOGY.
MLA	Huang, Dongqin,et al."Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay, China, since the Late Pleistocene".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2024).