Impacts of the invasive Spartina anglica on C-S-Hg cycles and Hg(II) methylating microbial communities revealed by hgcA gene analysis in intertidal sediment of the Han River estuary, Yellow Sea SCIE SCOPUS

Cited 0 time in WEB OF SCIENCE Cited 0 time in Scopus
Title
Impacts of the invasive Spartina anglica on C-S-Hg cycles and Hg(II) methylating microbial communities revealed by hgcA gene analysis in intertidal sediment of the Han River estuary, Yellow Sea
Author(s)
Park, Jisu; Cho, Hyeyoun; Han, Seunghee; An, Sung-Uk; Choi, Ayeon; Lee, Hyeonji; Hyun, Jung-Ho
KIOST Author(s)
An, Sung-Uk(안성욱)Choi, A Yeon(최아연)
Alternative Author(s)
안성욱; 최아연
Publication Year
2023-02
Abstract
We investigated the impact of invasive vegetation on mercury cycles, and identified microorganisms directly related to Hg(II) methylation using hgcA gene in vegetated mud flats (VMF) inhabited by native Suaeda japonica (SJ) and invasive Spartina anglica (SA), and unvegetated mud flats (UMF) in Ganghwa intertidal sediments. Sulfate reduction rate (SRR) and rate constants of Hg(II) methylation (Km) and methyl-Hg demethylation (Kd) were consistently greater in VMF than in UMF, specifically 1.5, 2 and 11.7 times higher, respectively, for SA. Both Km and Kd were significantly correlated with SRR and the abundance of sulfate-reducing bacteria. These results indicate that the rhizosphere of invasive SA provides a hotspot for Hg dynamics coupled with sulfate reduction. HgcA gene analysis revealed that Hg(II)-methylators were dominated by Deltaproteobacteria, Chloroflexi and Euryarchaeota, comprising 37.9%, 35.8%, and 6.5% of total hgcA gene sequences, respectively, which implies that coastal sediments harbor diverse Hg(II)-methylating microorganisms that previously underrepresented.
ISSN
0025-326X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43799
DOI
10.1016/j.marpolbul.2022.114498
Bibliographic Citation
Marine Pollution Bulletin, v.187, 2023
Publisher
Pergamon Press Ltd.
Keywords
Hg(II) methylation; Hg(II)-methylating microbial communities; hgcA gene; MeHg demethylation; Sulfate reduction; Vegetated intertidal sediment
Type
Article
Language
English
Publisher
Pergamon Press Ltd.
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse