Seasonal changes in total mercury and methylmercury in subtropical decomposing litter correspond to the abundances of nitrogen-fixing and methylmercury-degrading bacteria
文献类型： 外文期刊
作者： Yang, Liping 1 ; Yang, Guang 1 ; Wang, Jueying 2 ; Xiong, Bingcai 2 ; Guo, Pan 1 ; Wang, Tao 1 ; Du, Hongxia 2 ; Ma, Ming 1 ; Wang, Dingyong 3 ;
作者机构： 1.Southwest Univ, Coll Resources & Environm, Ctr Mol Ecophysiol CMEP, Chongqing 400715, Peoples R China
2.Southwest Univ, Coll Resources & Environm, Chongqing Key Lab Bioresource Bioenergy, Chongqing 400715, Peoples R China
3.Southwest Univ, Coll Resources & Environm, Chongqing Key Lab Agr Resources & Environm, Chongqing 400715, Peoples R China
4.Southwest Univ, Coll Resources & Environm, 2, Tiansheng Rd, Chongqing 400715, Peoples R China
关键词： Litterfall decomposition; Methylmercury; Nitrogen-fixing microbes; MeHg-degrading microbes; Subtropical forest
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：12.2； 五年影响因子：11.9 ）
ISSN： 0304-3894
年卷期： 2023 年 442 卷
页码：
收录情况： SCI
摘要： Previous research has found total mercury (THg) and methylmercury (MeHg) levels increase with litterfall decay, thus suggesting litterfall decomposition plays an essential role in the biogeochemical transformation of mercury (Hg). However, it remains unclear how Hg accumulates in the decaying litter, how bacterial taxa networks vary and what roles various microorganisms play during litterfall decomposition, especially nitrogen (N)-fixing, MeHg-degrading and Hg-methylating microbes. Here, we demonstrated as degradation proceeded, a gradually -complex network evolved for litterfall bacteria for the subtropical mixed broadleaf-conifer (MBC) forest, whereas a relatively static network existed for the evergreen broadleaf (EB) forest. N-fixing and MeHg-degrading bacteria dominated throughout litterfall decomposition process, with relative abundances of N-fixing genera and nifH copies maximum and relative abundances of MeHg-degrading bacteria and merAB copies minimum in summer. Hence, N-fixing bacteria likely mediate THg increase in the decomposing litterfall, while MeHg enhancement may be regulated by aerobic MeHg-degrading microbes which can transform MeHg to inorganic divalent Hg(Hg2+) or further to elemental Hg (Hg0). Together, this work elucidates variations of N-fixing and MeHg-degrading microbes in decaying litterfall and their relationships with Hg accumulation, providing novel in-sights into understanding the biogeochemical cycle of Hg in the forest ecosystem.
- 相关文献
作者其他论文 更多>>
-
Selenium- and chitosan-modified biochars reduce methylmercury contents in rice seeds with recruiting Bacillus to inhibit methylmercury production
作者：Guo, Pan;Ma, Ming;Rennenberg, Heinz;Du, Hongxia;Xiong, Bingcai;Ma, Ming;Zhao, Wancang;Wang, Mingxing;Wang, Dingyong;He, Mingyan;Flemetakis, Emmanouil;Haensch, Robert
关键词：Biochar; Methylmercury; Paddy soil; Microbes; Network
-
Adsorption effect and mechanism of Cd(II) by different phosphorus-enriched biochars
作者：Zeng, Yang;Lin, Yuhan;Ma, Ming;Chen, Hong;Ma, Ming;Chen, Hong;Ma, Ming;Chen, Hong
关键词：Phosphorous-enriched biochar; Agricultural and forestry waste; Low-grade phosphate rock and derivatives; Cadmium; Adsorption mechanism; Mineral precipitation
-
A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar
作者：Zeng, Yang;Lin, Yuhan;Ma, Ming;Chen, Hong;Ma, Ming;Chen, Hong;Ma, Ming;Chen, Hong
关键词：phosphorus-rich biochar; precursor; carbonization process; adsorption mechanism
-
The duality of sulfate-reducing bacteria: Reducing methylmercury production in rhizosphere but enhancing accumulation in rice plants
作者：Guo, Pan;Mao, Qiaozhi;Deng, Yuhan;Wang, Xun;Fan, Xu;Ma, Ming;Du, Hongxia;Xiong, Bingcai;Deng, Yuhan;Wang, Dingyong;Ma, Ming;Li, Jing;Agathokleous, Evgenios
关键词：Rice; Methylmercury; Amino acid; Sulfate-reducing bacteria; Transcription factors
-
Bacterial assemblages imply methylmercury production at the rice-soil system
作者：Guo, Pan;Rennenberg, Heinz;Wang, Tao;Gao, Lan;Ma, Ming;Du, Hongxia;Ma, Ming;Flemetakis, Emmanouil;Hansch, Robert;Wang, Dingyong
关键词：Mercury gradient; Methylation; Plant development; Rice; Microbial interaction
-
Biogeochemical transformation of mercury driven by microbes involved in anaerobic digestion of municipal wastewater
作者：Gao, Yuanqin;Cheng, Hao;Xiong, Bingcai;Du, Hongxia;Liu, Lei;Imanaka, Tadayuki;Igarashi, Yasuo;Ma, Ming;Luo, Feng;Ma, Ming;Wang, Dinyong;Du, Hongxia;Ma, Ming
关键词：Anaerobic digestion; Municipal wastewater; Mercury; Biogeochemical transformation; Methylation; demethylation
-
Differentially-expressed genes related to glutathione metabolism and heavy metal transport reveals an adaptive, genotype-specific mechanism to Hg2+exposure in rice (Oryza sativa L.)
作者：Wang, Shufeng;Guo, Pan;Rennenberg, Heinz;Ma, Ming;Yao, Hesheng;Li, Lingyi;Du, Hongxia;Wang, Dingyong
关键词：Mercury; Accumulation; Tolerance; Antioxidant system; Differentially expressed genes (DEGs)
