气候变化领域集成服务门户(CCPortal): Mercury biomagnification at higher rates than the global average in aquatic ecosystems of the Qinghai-Tibet Plateau

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DOI	10.1016/j.jhazmat.2023.131408
	Mercury biomagnification at higher rates than the global average in aquatic ecosystems of the Qinghai-Tibet Plateau
	Han, Yuzhu; Jiang, Yihang; Xiong, Xiong; Sui, Xiaoyun; Zhu, Ren; Feng, Xiu; Li, Kemao; Jia, Yintao; Chen, Yifeng
发表日期	2023
ISSN	0304-3894
EISSN	1873-3336
卷号	453
英文摘要	Mercury biomagnification in aquatic ecosystems is a global issue. Biomagnification patterns and drivers in alpine regions remain poorly understood. Hg biomagnification in the aquatic food web of the Qinghai-Tibetan Plateau (Q-T Plateau) was investigated. A total of 302 fish and macroinvertebrate tissue samples were analysed for total mercury (THg) and nitrogen (delta N-15) stable isotope ratios. Overall, 26.75% of fish individuals exceeded the USFWS consumption guidelines. A total of 52.17% of the sampling sites covering different habitats exhibited a significantly positive THg-delta N-15 relationship, which confirmed the Hg biomagnification potential of Q-T Plateau aquatic ecosystems. The Q-T Plateau Hg biomagnification rates were generally far higher than global averages regardless of the habitat type. Hg in sediments, elevation and population density were positively related to the Hg biomagnification magnitude on the Q-T Plateau, which could be attributed to the disproportionate response of Hg concentrations in macroinvertebrates and fishes along environmental gradients. Our findings offer empirical evidence that fish consumption on the Q-T Plateau poses a substantial Hg exposure risk to people living along river and lake shores. Higher biomagnification rates could further disproportionately accelerate Hg pollution in Q-T Plateau aquatic ecosystems under future anthropogenic activities and climate warming trajectories.
关键词	Biomagnification pattern Fish and macroinvertebrate Hg pollution Trophic magnification slope
英文关键词	FOOD WEBS; FRESH-WATER; INVERSE RELATIONSHIP; YAK DUNG; FISH; EXPOSURE; ECOLOGY; ENVIRONMENT; ISOTOPES; PATTERNS
WOS研究方向	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000983621500001
来源期刊	JOURNAL OF HAZARDOUS MATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283480
作者单位	Chinese Academy of Sciences; Institute of Hydrobiology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Han, Yuzhu,Jiang, Yihang,Xiong, Xiong,et al. Mercury biomagnification at higher rates than the global average in aquatic ecosystems of the Qinghai-Tibet Plateau[J],2023,453.
APA	Han, Yuzhu.,Jiang, Yihang.,Xiong, Xiong.,Sui, Xiaoyun.,Zhu, Ren.,...&Chen, Yifeng.(2023).Mercury biomagnification at higher rates than the global average in aquatic ecosystems of the Qinghai-Tibet Plateau.JOURNAL OF HAZARDOUS MATERIALS,453.
MLA	Han, Yuzhu,et al."Mercury biomagnification at higher rates than the global average in aquatic ecosystems of the Qinghai-Tibet Plateau".JOURNAL OF HAZARDOUS MATERIALS 453(2023).