气候变化领域集成服务门户(CCPortal): Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China

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DOI	10.1016/j.ecolind.2019.04.066
	Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China
	Kang, Huhu; Liu, Xiaohong; Guo, Junming; Wang, Bo; Xu, Guobao; Wu, Guoju; Kang, Shichang; Huang, Jie
发表日期	2019
ISSN	1470-160X
EISSN	1872-7034
卷号	104
英文摘要	Mercury (Hg) is a potent neurotoxin in low concentrations and can be transported over a long distance in the atmosphere. Due to Hg accumulation, plant tissues could be used as a low-cost and efficient biological indicator. A significant linear relationship was found between Hg value and organic carbon content in soil, and the highest Hg concentration reached up to the level of 267.1 ng/g in the topsoil layer near the coal-fired power plant. There were evident distance-dependent variations of Hg concentration in needles close to the cement factory. There was a significant Hg accumulation in the needles from all sites, and the highest Hg concentrations were observed in needle samples from the site nearest to the cement factory (HXG1). Hg in tree rings increased by year gradually for all sites, with the highest concentrations of Hg recorded in the site closest to the cement factory. The tree bark of the HXG1 site recorded the highest Hg concentration (65.8 ng/g), reflecting the total Hg deposition from the atmosphere and cement dust associated-Hg loading over the region. Due to the limited data, however, we cannot confirm the possible translocation of Hg from tree bark to outmost tree rings at this time. Overall, we concluded that in our study area, most of the accumulated Hg emissions originated from the cement factory. Even at low Hg concentrations, Hg in tree-rings, needles and barks could not only be used as bioindicators for Hg pollution but also infer the pollution history over long-term periods and to enhance our understandings of the biogeochemical Hg cycling in the forest ecosystems.
关键词	Tree rings Point-pollution source Soil Needles and tree bark Mercury pollution
学科领域	Biodiversity & Conservation; Environmental Sciences & Ecology
语种	英语
WOS研究方向	Biodiversity Conservation ; Environmental Sciences
来源期刊	ECOLOGICAL INDICATORS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112021
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Kang, Huhu,Liu, Xiaohong,Guo, Junming,et al. Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China[J]. 中国科学院西北生态环境资源研究院,2019,104.
APA	Kang, Huhu.,Liu, Xiaohong.,Guo, Junming.,Wang, Bo.,Xu, Guobao.,...&Huang, Jie.(2019).Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China.ECOLOGICAL INDICATORS,104.
MLA	Kang, Huhu,et al."Characterization of mercury concentration from soils to needle and tree rings of Schrenk spruce (Picea schrenkiana) of the middle Tianshan Mountains, northwestern China".ECOLOGICAL INDICATORS 104(2019).