气候变化领域集成服务门户(CCPortal): Mercury in Wild Fish from High-Altitude Aquatic Ecosystems in the Tibetan Plateau

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DOI	10.1021/es404275v
	Mercury in Wild Fish from High-Altitude Aquatic Ecosystems in the Tibetan Plateau
	Zhang, Qianggong; Pan, Ke; Kang, Shichang; Zhu, Aijia; Wang, Wen-Xiong
发表日期	2014
ISSN	0013-936X
EISSN	1520-5851
卷号	48 期号:9
英文摘要	Our understanding of the biogeochemistry of mercury (Hg) in high-altitude aquatic environments remains limited. The Tibetan Plateau (TP) is one of the Earth's most significant continental-scale high lands, yet much remains unknown about the Hg bioaccumulation and biomagnification in these pristine ecosystems. In this study, 166 wild fish samples of 13 species were collected from 13 rivers and lakes across the southern TP. Total Hg (THg) and methyl-Hg (MeHg) concentrations in the axial muscle of fish ranged from 25.1 to 1218 ng g(-1) of wet weight (median +/- average deviation of 100.5 +/- 149.2 ng g(-1)) and from 24.9 to 1196 ng g(-1) of wet weight (median +/- average deviation of 90.7 +/- 137.0 ng g(-1)), respectively. Hg concentrations varied greatly within and between species. The fish Hg concentrations were then linked to the limited available environmental Hg data and special geochemical characteristics in the region, such as Hg loading, pH, low temperature, and high ultraviolet (UV). The long lifespan and slow growth of the fish under the low-productivity environments may be the major biological factors that help to build up the fish Hg levels comparable to those observed in wild fish growing in human-impacted areas. delta C-13 signals suggested that pelagic fish had higher Hg concentrations, but no relationship was found between the Hg concentrations and the trophic levels. Zooplankton and benthic amphipods had typically higher percentages of MeHg compared to the previously reported values, suggesting the efficient transfer of MeHg from the base of the aquatic food web. This study sheds some light on the geochemical and biological controls of Hg bioaccumulation in fish and biomagnification in the aquatic food web in arid high-altitude environments.
学科领域	Engineering; Environmental Sciences & Ecology
语种	英语
WOS研究方向	Engineering, Environmental ; Environmental Sciences
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
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/111718
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qianggong,Pan, Ke,Kang, Shichang,et al. Mercury in Wild Fish from High-Altitude Aquatic Ecosystems in the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2014,48(9).
APA	Zhang, Qianggong,Pan, Ke,Kang, Shichang,Zhu, Aijia,&Wang, Wen-Xiong.(2014).Mercury in Wild Fish from High-Altitude Aquatic Ecosystems in the Tibetan Plateau.ENVIRONMENTAL SCIENCE & TECHNOLOGY,48(9).
MLA	Zhang, Qianggong,et al."Mercury in Wild Fish from High-Altitude Aquatic Ecosystems in the Tibetan Plateau".ENVIRONMENTAL SCIENCE & TECHNOLOGY 48.9(2014).