Article
Microbiology
Qi-Yun Liang, Jin-Yu Zhang, Daliang Ning, Wen-Xing Yu, Guan-Jun Chen, Xuanyu Tao, Jizhong Zhou, Zong-Jun Du, Da-Shuai Mu
Summary: Inhibiting sulfate-reducing bacteria (SRB) has shown various effects on microbial community properties and coexistence patterns, indicating the importance of SRB in organic matter (OM) degradation. Suppression of SRB resulted in decreased relative abundances of several bacterial families and altered network and community assembly processes. These findings highlight the essential role of SRB in OM degradation.
Article
Geosciences, Multidisciplinary
Alexandra V. Turchyn, Harold J. Bradbury, Kathryn Walker, Xiaole Sun
Summary: Through a global compilation of pore fluid data, we found strong correlations between sulfate concentration gradients and alkalinity gradients, as well as calcium gradients, especially improving in sediments containing methane. Sedimentary pore fluids high in phosphate concentrations also exhibit high alkalinity, suggesting potential suppression of carbonate mineral precipitation in their presence.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Rosa Acevedo-Barrios, Carolina Rubiano-Labrador, Dhania Navarro-Narvaez, Johana Escobar-Galarza, Diana Gonzalez, Stephanie Mira, Dayana Moreno, Aura Contreras, Wendy Miranda-Castro
Summary: This study isolated and characterized halotolerant bacteria from marine sediments in Antarctica that can potentially degrade perchlorate. The isolated bacteria showed the ability to survive in high-salinity conditions and degrade perchlorate, with I. loihiensis exhibiting the highest reduction. This finding of P. cryohalolentis and P. lactis on the Antarctic continent is significant, and these bacteria offer promising resources for the bioremediation of perchlorate contamination in high-salinity ecosystems.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Editorial Material
Microbiology
Kenneth Wasmund
Summary: Sulfate-reducing microorganisms (SRM) play a crucial role in global sulfur and carbon cycles, especially in anoxic marine sediments. They consume fermentation products and hydrogen, affecting microbial communities, particularly members of the Marinilabiliales. This study provides new insights into the ecological networks and community assembly in marine sediment microbes, highlighting the importance of SRM activity in ecosystem functions.
Article
Environmental Sciences
Yuyin Yang, Jianfei Chen, Jennifer Pratscher, Shuguang Xie
Summary: Methanotrophs are the main consumers of methane in lake sediments and play a key role in regulating methane flux and carbon cycling. In this study, nucleic acid stable isotope probing was used to investigate the active methanotrophic microbial community in eutrophication-affected shallow lakes. The results showed that gamma-proteobacterial methanotrophs and beta-proteobacterial methanol-utilizers were involved in methane-derived carbon assimilation, with Crenothrix being the key methane consumer. The wide distribution of Crenothrix in lake sediments and its active methane assimilation suggest its importance as a biological sink for methane in shallow lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Chin Yik Lin, Harold J. Bradbury, Gilad Antler, David J. Burdige, Thomas D. Bennett, Shichun Li, Alexandra V. Turchyn
Summary: Sedimentary microbial communities play a critical role in the global carbon cycle, with the presence of clay minerals stimulating the growth of sulfate-reducing bacteria and influencing the rate of sulfate consumption in marine sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Engineering, Marine
Roberto Briones-Gallardo, Muriel Gonzalez-Munoz, Itza Garcia-Bautista, David Valdes-Lozano, Tanit Toledano-Thompson, Erik Polanco-Lugo, Renata Rivera-Madrid, Ruby Valdez-Ojeda
Summary: This study evaluated the capability of microbial consortia isolated from marine sediment to produce hydrogen sulfide in batch reactors. The results showed that the microbial consortia from open-ocean exhibited better substrate utilization and higher hydrogen sulfide production. In addition, the enrichment of sulfate-reducing microbial consortia from moderately eutrophic marine sediments resulted in changes in microbial diversity compared to the original sediment microorganisms.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Tingting Chen, Harald Strauss, Yunxin Fang, Zhiyong Lin, Xiaoming Sun, Jiarui Liu, Yang Lu, Xin Yang, Haixin Lin, Zhongwei Wu, Xiao Lin
Summary: Organoclastic sulfate reduction (OSR) and sulfate-driven anaerobic oxidation of methane (SD-AOM) are two major microbial pathways in the marine sulfur cycle. The isotopic compositions of pore water sulfate provide insights into the mechanism of sulfur and oxygen partitioning during OSR and SD-AOM, indicating distinct trends based on the mode of sulfate reduction.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Engineering, Environmental
Dongdan Yuan, Lei Zheng, Yong-Xin Liu, Hongguang Cheng, Aizhong Ding, Xiaomin Wang, Qiuyang Tan, Xue Wang, Yuzi Xing, En Xie, Haoming Wu, Shanyun Wang, Guibing Zhu
Summary: Through the use of double tracer technique and metagenomic sequencing, we found that the production of N2O in plateau wetlands is promoted by nitrifier denitrification, with the key functional genes belonging to comammox bacteria Nitrospira nitrificans. The comammox bacterial species N. nitrificans and ammonia oxidizing bacterial species Nitrosomonas europaea cooperate to produce N2O in plateau wetland sediments. Environmental factors such as elevation and total organic matter influence the cooperation pattern via N. nitrificans, thus affecting N2O production activity in plateau wetland sediments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Sean J. Loyd, Marissa N. Smirnoff
Summary: The importance of different diagenetic pathways in the formation of authigenic carbonate (AC) was studied, and it was found that anaerobic oxidation of methane (AOM) may be the most significant pathway. The impact of AOM on marine carbon budgets was evaluated.
Article
Engineering, Environmental
Qing Zhao, Xiaomin Li, Shengtao Xiao, Weihua Peng, Wenhong Fan
Summary: Integrated-remediation technologies using sulfate reducing bacteria (SRB) and nano zero valent iron (nZVI) have shown great potential in immobilizing Cd in contaminated sediments, particularly with higher doses of nZVI. The study identified five typical SRBs that play a significant role in transforming Cd speciation and stabilizing it into sulfide precipitation through dissimilatory sulfate reduction (DSR). The results suggest that nZVI may stimulate SRB bio-immobilization by providing electrons and enhancing enzyme activities during DSR, leading to the formation of Cd-S-Fe complexes.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Microbiology
Peter Q. Fischer, Irene Sanchez-Andrea, Alfons J. M. Stams, Laura Villanueva, Diana Z. Sousa
Summary: Methanol is a ubiquitous compound in marine sediments, serving as a carbon and energy source for various microorganisms that compete for it using different biochemical pathways. Current knowledge provides insight into the sources of methanol, the ecology of methanol-utilizing microorganisms, and their metabolism, but the unknown diversity of methanol utilizers in marine sediments remains to be explored through metagenomic analysis.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Microbiology
Xiangyuan Li, Maohua Yang, Tingzhen Mu, Delu Miao, Jinlong Liu, Jianmin Xing
Summary: This study investigated the community structure of total bacteria, sulfide-oxidizing bacteria (SOB), and sulfate-reducing bacteria (SRB) in soda lakes with different physicochemical factors. The results showed that SOB and SRB were widely distributed and their communities were influenced by salinity and inorganic nitrogen sources. Specific genera of SOB and SRB were significantly affected by different factors. Rhodoplanes played a significant role in the interaction between SOB and SRB.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Thi Quynh Hoa Kieu, Thi Yen Nguyen, Chi Linh Do
Summary: A wastewater treatment system utilizing sulfate-reducing and sulfide-oxidizing processes was developed for organic wastewater with high sulfate/sulfide content. The study investigated the impacts of COD/SO42- ratio and hydraulic retention time (HRT) on the removal efficiencies of sulfate, COD, sulfide, and electricity generation. The results showed stable COD and sulfate removal efficiencies of 94.8±0.6% and 93.0±1.3% during the 63-day continuous operation. A power density level of 18.0±1.6 mW/m2 was achieved with a sulfide removal efficiency of 93.0±1.2%. However, sulfide removal efficiency and power density gradually decreased after 45 days, potentially due to sulfur accumulation on the anode.
Article
Materials Science, Multidisciplinary
Xiaojing Di, Haodan Pan, Maocheng Yan, Victor Malachy Udowo, Xiaoxu Li
Summary: The microbial corrosion of X60 pipeline steel in a groundwater environment containing mixed colonies of sulfate-reducing bacteria (SRB) and iron-oxidizing bacteria (IOB) was investigated. The results show that both SRB and IOB significantly affect the electrochemical process of steel and have a synergistic effect on intensifying microbial proliferation and promoting corrosion.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)