气候变化领域集成服务门户(CCPortal): Sedimentary organic molecular compositions reveal the influence of glacier retreat on ecology on the Tibetan Plateau

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DOI	10.1016/j.scitotenv.2023.163629
	Sedimentary organic molecular compositions reveal the influence of glacier retreat on ecology on the Tibetan Plateau
	Shi, Siwei; Xu, Hai; Shui, Yong; Liu, Dandan; Xie, Qiaorong; Zhou, Kang'en; Zhang, Jin; Song, Yunping; Wang, Jing; Hu, Chukun; Wang, Yuchun; Fu, Pingqing
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	882
英文摘要	Global warming and glacier retreat have significant impacts on the structure and function of natural ecosystems. How-ever, little is known about how glacier retreat affects the long-term evolution of ecosystems at high-altitude regions. In this study, we explored the possible effects of glacier retreat on catchment vegetation and lake productivity in Lake Puma Yumco, southeastern Tibetan Plateau, based on detailed organic molecular compositions determined by an ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), and combined with various sedimentary geochemical indicators. The glaciers in the catchment keep retreating since 1870 CE, as in-ferred from the multiple indices of total organic carbon content (TOC), total nitrogen content (TN), C/N ratios, and car-bonate contents. Accompanying modern global warming and glacier shrinkage, the relative abundance of soil-and vegetation-derived large molecular compounds (e.g., vascular plant-derived polyphenols, highly unsaturated and phe-nolic compounds, and condensed aromatics) increased gradually in lake sediments, suggesting that ice-covered land was exposed under warming condition, and gradually revegetation occurred. Both increases in relative abundance of nitrogen-containing compounds (e.g., CHNO) and chlorophyll derivative contents in the lake sediments were ob-served since 1870 CE, suggesting that stronger catchment weathering and increasing terrestrial nutrient loads en-hanced the downstream lake productivity after glacier retreat. Our results imply that continued global warming and alpine glacier retreat in the future may further promote vegetation expansion and increases in lake productivity on the Tibetan Plateau.
关键词	Global warming Glacier retreat Organic molecular composition Tibetan Plateau Biomass expansion
英文关键词	RESONANCE MASS-SPECTROMETRY; MONSOON VARIABILITY; LATE-HOLOCENE; PORE-WATER; MATTER; LAKE; GEOCHEMISTRY; RECORD; SHIFTS; CO
WOS研究方向	Environmental Sciences
WOS记录号	WOS:000988880700001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283852
作者单位	Tianjin University; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Shi, Siwei,Xu, Hai,Shui, Yong,et al. Sedimentary organic molecular compositions reveal the influence of glacier retreat on ecology on the Tibetan Plateau[J],2023,882.
APA	Shi, Siwei.,Xu, Hai.,Shui, Yong.,Liu, Dandan.,Xie, Qiaorong.,...&Fu, Pingqing.(2023).Sedimentary organic molecular compositions reveal the influence of glacier retreat on ecology on the Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,882.
MLA	Shi, Siwei,et al."Sedimentary organic molecular compositions reveal the influence of glacier retreat on ecology on the Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 882(2023).