Journal of Microbiology

Yu Zhen

1 Article

Differences in the methanogen community between the nearshore and offshore sediments of the South Yellow Sea: Ye Chen , Yu Zhen , Jili Wan , Siqi Li , Jiayin Liu , Guodong Zhang , Tiezhu Mi; J. Microbiol. 2022;60(8):814-822. Published online July 14, 2022; DOI: https://doi.org/10.1007/s12275-022-2022-2

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The differences in methanogen abundance and community composition were investigated between nearshore and offshore sediments in the South Yellow Sea (SYS). Shannon, Simpson, and Chao1 indices revealed a higher diversity of methanogens in the nearshore sediments than in the offshore sediments. The Mann–Whitney U test demonstrated that the relative abundance of Methanococcoides was significantly higher in the offshore sediments, while the relative abundances of Methanogenium, Methanosarcina, Methanosaeta, Methanolinea, and Methanomassiliicoccus were significantly higher in the nearshore sediments (P < 0.05). The abundance of the mcrA gene in the nearshore sediments was significantly higher than that in the offshore sediments. Furthermore, a similar vertical distribution of the methanogen and sulfatereducing bacteria (SRB) abundances was observed in the SYS sediments, implying there is potential cooperation between these two functional microbes in this environment. Finally, total organic carbon (TOC) was significantly correlated with methanogen community composition.

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Lufeng Chen, Guoyi Cheng, Zhengwen Zhou, Yong Liang, Zhijia Ci, Yongguang Yin, Guangliang Liu, Yong Cai, Yanbin Li
Water Research.2024; 258: 121792. CrossRef
Diversity, composition, metabolic characteristics, and assembly process of the microbial community in sewer system at the early stage
Yiming Yuan, Guangyi Zhang, Hongyuan Fang, Haifeng Guo, Yongkang Li, Zezhuang Li, Siwei Peng, Fuming Wang
Environmental Science and Pollution Research.2024; 31(9): 13075. CrossRef
Improved Quantitative Real-Time PCR Protocol for Detection and Quantification of Methanogenic Archaea in Stool Samples
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Yu Zhen

1 Article

Environmental Adaptability and Roles in Ammonia Oxidation of Aerobic Ammonia-Oxidizing Microorganisms in the Surface Sediments of East China Sea: Wenhui Li, Yu Zhen, Yuhong Yang, Daling Wang, Hui He; J. Microbiol. 2024;62(10):845-858. Published online August 30, 2024; DOI: https://doi.org/10.1007/s12275-024-00166-5

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Abstract

This study investigated the community characteristics and environmental influencing factors of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in the surface sediments of the East China Sea. The research found no consistent pattern in the richness and diversity of AOA and AOB with respect to the distance from the shore, indicating a complex interplay of factors. The expression levels of AOA amoA gene and AOB amoA gene in the surface sediments of the East China Sea ranged from 4.49 × 10² to 2.17 × 10⁶ copies per gram of sediment and from 6.6 × 10¹ to 7.65 × 10⁴ copies per gram of sediment, respectively. Salinity (31.77 to 34.53 PSU) and nitrate concentration (1.51 to 10.12 μmol/L) were identified as key environmental factors significantly affecting the AOA community, while salinity and temperature (13.71 to 19.50 °C) were crucial for the AOB community. The study also found that AOA, dominated by the Nitrosopumilaceae family, exhibited higher gene expression levels than AOB, suggesting a more significant role in ammonia oxidation. The expression of AOB was sensitive to multiple environmental factors, indicating a responsive role in nitrogen cycles and ecosystem health. The findings contribute to a better understanding of the biogeochemical processes and ecological roles of ammonia-oxidizing microorganisms in marine sediments.

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Metabolism diversification of ammonia-oxidizing archaea and bacteria under different precipitation gradients and land legacies
Soumyadev Sarkar, Anna Kazarina, Paige M. Hansen, Kaitlyn Ward, Christopher Hargreaves, Nicholas Reese, Qinghong Ran, Willow Kessler, Ligia F.T. de Souza, Terry D. Loecke, Marcos V.M. Sarto, Charles W. Rice, Lydia H. Zeglin, Benjamin A. Sikes, Sonny T.M.
Applied Soil Ecology.2025; 206: 105831. CrossRef

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