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Mercury and other trace elements distribution and profiling of microbial community in the surface sediments of East Siberian Sea

Authors
Chaudhary, Dhiraj KumarKarki, Hem PrakashBajagain, RishikeshKim, HwansukRhee, Tae SiekHong, Jong KukHan, SeungheeChoi, Young-GyunHong, Yongseok
Issue Date
Dec-2022
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Total mercury; Methylmercury; Trace elements; Microbial communities; Surface sediment; Arctic
Citation
MARINE POLLUTION BULLETIN, v.185
Indexed
SCIE
SCOPUS
Journal Title
MARINE POLLUTION BULLETIN
Volume
185
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/190564
DOI
10.1016/j.marpolbul.2022.114319
ISSN
0025-326X
1879-3363
Abstract
In this study, total mercury (THg), methylmercury (MeHg), various trace elements, and microbial communities were measured in surface sediments of the East Siberian Sea (ESS). The results showed that the average values of THg and MeHg were 58.8 +/- 15.21 mu g/kg and 0.50 +/- 0.22 mu g/kg, respectively. The notable levels of trace ele-ments present in both surface sediment and porewater were Al, Fe, and Mn. The enrichment factor and geo-accumulation index analyses found that both natural phenomena and anthropogenic activities contributed to elevated concentrations of metals in the ESS. The redox proxy metals, pH, and SO42-; were the major factors influencing the THg and MeHg distributions. Microbial profiles were substantially affected by metals and other abiotic factors. Proteobacteria and Thaumarchaeota were the most abundant phyla. Overall, the findings presented here facilitate the understanding of the current status of metal contamination, its influencing factors, and metal-microbiota-interactions in ESS.
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