干旱区生态环境知识资源中心(Arid): Effect of salinity and algae biomass on mercury cycling genes and bacterial communities in sediments under mercury contamination: Implications of the mercury cycle in arid regions

Arid

DOI	10.1016/j.envpol.2020.116141
	Effect of salinity and algae biomass on mercury cycling genes and bacterial communities in sediments under mercury contamination: Implications of the mercury cycle in arid regions
	Song, Wenjuan; Xiong, Heigang; Qi, Ran; Wang, Shuzhi; Yang, Yuyi
通讯作者	Song, WJ (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China.
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2021
卷号	269
英文摘要	Lakes in arid regions are experiencing mercury pollution via air deposition and surface runoff, posing a threat to ecosystem safety and human health. Furthermore, salinity and organic matter input could influence the mercury cycle and composition of bacterial communities in the sediment. In this study, the effects of salinity and algae biomass as an important organic matter on the genes (merA and hgcA) involved in the mercury cycle under mercury contamination were investigated. Archaeal merA and hgcA were not detected in sediments of lake microcosms, indicating that bacteria rather than archaea played a crucial role in mercury reduction and methylation. The high content of mercury (300 ng g(-1)) could reduce the abundance of both merA and hgcA. The effects of salinity and algae biomass on mercury cycling genes depended on the gene type and dose. A higher input of algae biomass (250 mg L-1) led to an increase of merA abundance, but a decrease of hgcA abundance. All high inputs of mercury, salinity, and algae biomass decreased the richness and diversity of bacterial communities in sediment. Further analysis indicated that higher mercury (300 ng g(-1)) led to an increased relative abundance of mercury methylators, such as Ruminococcaceae, Bacteroidaceae, and Veillonellaceae. Under saline conditions (10 and 30 g L-1), the richness of specific bacteria associated with mercury reduction (Halomonadaceae) and methylation (Syntrophomonadaceae) increased compared to the control. The input of algae biomass led to an increase in the specific bacterial communities associated with the mercury cycle and the richness of bacteria involved in the decomposition of organic matter. These results provide insight into mercury cycle-related genes and bacterial communities in the sediments of lakes in arid regions. (C) 2020 Elsevier Ltd. All rights reserved.Y
英文关键词	merA hgcA Mercury methylator Sediment Lake
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604429000066
WOS关键词	GREAT-SALT-LAKE ; MICROBIAL COMMUNITIES ; RESISTANT-BACTERIA ; MERA GENE ; METHYLATION ; WATER ; METHYLMERCURY ; SOILS ; BIOREMEDIATION ; POLLUTION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347862
作者单位	[Song, Wenjuan; Wang, Shuzhi] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Song, Wenjuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Xiong, Heigang] Beijing Union Univ, Coll Appl Arts & Sci, Beijing 100191, Peoples R China; [Qi, Ran] China Geol Survey, Command Ctr Comprehens Nat Resources Survey, Beijing 100055, Peoples R China; [Qi, Ran] China Univ Geosci, Inst Geol Survey, Wuhan 430074, Peoples R China; [Yang, Yuyi] Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Song, Wenjuan,Xiong, Heigang,Qi, Ran,et al. Effect of salinity and algae biomass on mercury cycling genes and bacterial communities in sediments under mercury contamination: Implications of the mercury cycle in arid regions[J]. 中国科学院新疆生态与地理研究所,2021,269.
APA	Song, Wenjuan,Xiong, Heigang,Qi, Ran,Wang, Shuzhi,&Yang, Yuyi.(2021).Effect of salinity and algae biomass on mercury cycling genes and bacterial communities in sediments under mercury contamination: Implications of the mercury cycle in arid regions.ENVIRONMENTAL POLLUTION,269.
MLA	Song, Wenjuan,et al."Effect of salinity and algae biomass on mercury cycling genes and bacterial communities in sediments under mercury contamination: Implications of the mercury cycle in arid regions".ENVIRONMENTAL POLLUTION 269(2021).