Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years

Yang QU; Kuidong XU; Tao LI; Maoyu WANG; Huan ZHONG; Tianyu CHEN

doi:10.1007/s00343-021-0474-6

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Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years

Seamount geological and geochemical characteristics | Updated：2023-04-27

- Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years
- Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years
- 海洋湖沼学报（英文） 2021年39卷第5期页码：1622-1633
- Affiliations：
  
  1.State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China
  2.Laboratory of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
  3.State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
  4.Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario K9L 0G2, Canada
  5.Center of Deep Sea Research, Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
- Author bio：
  
  Tianyu CHEN, E-mail: tianyuchen@nju.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(41822603);the National Natural Science Foundation of China(41991325);the National Natural Science Foundation of China(41930533);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB40010200);the Fundamental Research Funds for the Central Universities(0206-14380125);the Frontiers Science Center for Critical Earth Material Cycling Fund(DLTD2102);© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
- DOI：10.1007/s00343-021-0474-6
  中图分类号：
- 收稿：2020-12-14，
  
  录用：2021-2-5，
  
  网络首发：2021-05-29，
  
  纸质出版：2021-09
- Accepted：
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Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years[J]. 海洋湖沼学报（英文）, 2021,39(5):1622-1633.

Yang QU, Kuidong XU, Tao LI, et al. Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years[J]. Journal of Oceanology and Limnology, 2021, 39(5): 1622-1633.
Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years[J]. 海洋湖沼学报（英文）, 2021,39(5):1622-1633. DOI： 10.1007/s00343-021-0474-6.

Yang QU, Kuidong XU, Tao LI, et al. Deep-sea coral evidence for dissolved mercury evolution in the deep North Pacific Ocean over the last 700 years[J]. Journal of Oceanology and Limnology, 2021, 39(5): 1622-1633. DOI： 10.1007/s00343-021-0474-6.

摘要

Abstract

The ocean is an important inventory of anthropogenic mercury (Hg)

yet the history of anthropogenic Hg accumulation in the ocean remains largely unexplored. Deep-sea corals are an emerging archive of past ocean chemistry

which take in sinking or suspended particulate organic matter as their food sources. Such organic matter would exchange Hg with the local seawater before being consumed by the deepsea corals. As such

the organics preserved in the coral skeleton may record the Hg evolution of the ambient seawater during the time of coral growth. Here

we report the first data on Hg concentrations variability of a deep-sea proteinaceous coral in the oligotrophic North Pacific at the water depth of 1 249 m

in attempt to understand the transfer of anthropogenic Hg into the deep Pacific ocean over the last seven centuries. We find that the Hg concentrations of different coral growth layers have remained relatively constant albeit with considerable short-term variability through time. The overall stable Hg concentration of the last seven centuries recorded in our sample suggests that anthropogenic pollution is not yet a clearly resolvable component in the deep oligotrophic North Pacific waters

in agreement with recent estimation from modelling works and observational studies of modern seawater profiles. As there is hardly an unambiguous way to separate anthropogenic Hg from the natural background based on recent seawater profiles

our historical data provide valuable information helping to understand the oceanic cycle of Hg through time.

关键词

Keywords

references

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