Terrestrial mercury transformation in the Tibetan Plateau: New evidence from stable isotopes in upland buzzards

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Terrestrial mercury transformation in the Tibetan Plateau: New evidence from stable isotopes in upland buzzards
	Liu, Hong-wei; Yu, Ben; Yang, Lin; Wang, Lin-lin; Fu, Jian-jie; Liang, Yong; Bu, Duo; Yin, Yong-guang; Hu, Li-gang; Shi, Jian-bo
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-12-05
卷号	400 页码:1-8
关键词	Mercury stable isotope Terrestrial ecosystem Mercury geochemical circulation Atmospheric photochemical reactions
ISSN号	0304-3894
英文摘要	Understanding the geochemical cycle of mercury (Hg) in the high-altitude Tibetan Plateau is of great value for studying the long-range transport of Hg. Herein, speciation and isotopic compositions of Hg in the muscle and feathers of upland buzzards (Buteo hemilasius) were studied to trace the terrestrial transformation of Hg in the Tibetan Plateau. Very low Hg content and relatively low 8 202 Hg values (feather: -0.77 +/- 0.50 parts per thousand, n = 9, muscle: -1.29 +/- 0.29 parts per thousand, n = 13, 1SD) were observed in upland buzzards. In contrast, the A 199 Hg values could be as high as 2.89 parts per thousand in collected samples. To our knowledge, this is the highest Delta Hg-199 value reported in avian tissues. Moreover, upland buzzards showed significantly different Delta Hg-199 values from fish collected from the same region, suggesting different generation and transformation processes of methylmercury (MeHg) in terrestrial and aquatic ecosystems. We speculated that different percentages of Hg undergoing photochemical reactions and contributions of atmospheric MeHg were possible reasons for observed differences. The results provide new clues for different circulation histories of Hg in terrestrial and aquatic ecosystems, which will be critical for further study of geochemical cycle and ecological risk of Hg in the environment.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44818]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Hong-wei,Yu, Ben,Yang, Lin,et al. Terrestrial mercury transformation in the Tibetan Plateau: New evidence from stable isotopes in upland buzzards[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,400:1-8.
APA	Liu, Hong-wei.,Yu, Ben.,Yang, Lin.,Wang, Lin-lin.,Fu, Jian-jie.,...&Jiang, Gui-bin.(2020).Terrestrial mercury transformation in the Tibetan Plateau: New evidence from stable isotopes in upland buzzards.JOURNAL OF HAZARDOUS MATERIALS,400,1-8.
MLA	Liu, Hong-wei,et al."Terrestrial mercury transformation in the Tibetan Plateau: New evidence from stable isotopes in upland buzzards".JOURNAL OF HAZARDOUS MATERIALS 400(2020):1-8.