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Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna

文献类型：期刊论文

作者Sun, Ruoyu5; Yuan, Jingjing5; Sonke, Jeroen E.4; Zhang, Yanxu3; Zhang, Tong2; Zheng, Wang5; Chen, Shun1; Meng, Mei5; Chen, Jiubin5; Liu, Yi5
刊名NATURE COMMUNICATIONS
出版日期2020-07-07
卷号11期号:1页码:9
ISSN号2041-1723
DOI10.1038/s41467-020-17045-3
英文摘要Monomethylmercury (MMHg) is a potent toxin that bioaccumulates and magnifies in marine food webs. Recent studies show abundant methylated Hg in deep oceans (>1000 m), yet its origin remains uncertain. Here we measured Hg isotope compositions in fauna and surface sediments from the Mariana Trench. The trench fauna at 7000-11000m depth all have substantially positive mass-independent fractionation of odd Hg isotopes (odd-MIF), which can be generated only in the photic zone via MMHg photo-degradation. Given the identical odd-MIF in trench fauna and North Pacific upper ocean (<1000 m) biota MMHg, we suggest that the accumulated Hg in trench fauna originates exclusively from MMHg produced in upper oceans, which penetrates to depth by sorption to sinking particles. Our findings reveal little in-situ MMHg production in deep oceans and imply that anthropogenic Hg released at the Earth's surface is much more pervasive across deep oceans than was previously thought.
WOS关键词MERCURY ISOTOPES ; TROPHIC TRANSFER ; INDEPENDENT FRACTIONATION ; HG ; METHYLATION ; DEMETHYLATION ; PRECONCENTRATION ; ENVIRONMENT ; REDUCTION ; SULFATE
资助项目National Key Research and Development Plan[2016YFC0300503] ; National Key Research and Development Plan[2017YFC0212700] ; National Natural Science Foundation of China[41625012] ; National Natural Science Foundation of China[41602345] ; National Natural Science Foundation of China[41922019] ; National Natural Science Foundation of China[U1612442] ; National Natural Science Foundation of China[41961144028] ; Tianjin Natural Science Foundation[17JCYBJC23500]
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATURE PUBLISHING GROUP
WOS记录号WOS:000548309100008
资助机构National Key Research and Development Plan ; National Natural Science Foundation of China ; Tianjin Natural Science Foundation
源URL[http://ir.idsse.ac.cn/handle/183446/7820]  
专题深海科学研究部_深海地质与地球化学研究室
专家咨询委员会
通讯作者Liu, Yi; Peng, Xiaotong
作者单位1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Deep Sea Sci Div, Sanya 572000, Hainan, Peoples R China
2.Nankai Univ, Tianjin Key Lab Environm Remediat & Pollut Contro, Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn,Minist Educ, 38 Tongyan Rd, Tianjin 300350, Peoples R China
3.Nanjing Univ, Sch Atmospher Sci, Nanjing 210023, Jiangsu, Peoples R China
4.Univ Paul Sabatier Toulouse III, Lab Geosci Environm Toulouse, CNRS, Inst Res & Dev, F-31400 Toulouse, France
5.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Ruoyu,Yuan, Jingjing,Sonke, Jeroen E.,et al. Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna[J]. NATURE COMMUNICATIONS,2020,11(1):9.
APA Sun, Ruoyu.,Yuan, Jingjing.,Sonke, Jeroen E..,Zhang, Yanxu.,Zhang, Tong.,...&Liu, Congqiang.(2020).Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna.NATURE COMMUNICATIONS,11(1),9.
MLA Sun, Ruoyu,et al."Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna".NATURE COMMUNICATIONS 11.1(2020):9.

入库方式： OAI收割

来源：深海科学与工程研究所

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