Article
Biotechnology & Applied Microbiology
Logan M. Peoples, John E. Dore, Evan M. Bilbrey, Trista J. Vick-Majors, John R. Ranieri, Kate A. Evans, Abigail M. Ross, Shawn P. Devlin, Matthew J. Church
Summary: Despite the presence of oxygen, methane is supersaturated in a large oligotrophic lake. Metagenomic sequencing reveals that diverse and widespread microorganisms may contribute to the oxic production of methane through the cleavage of methylphosphonate. Our experiments demonstrate that these microorganisms, especially members of the Acidovorax genus, can produce methane through this process. However, significant rates of methane production only occur when both methylphosphonate and labile sources of carbon are present, suggesting that this process may be limited to specific niches and may not fully account for methane concentrations in Flathead Lake. This study adds to our understanding of methane dynamics by describing the microorganisms and their methane production rates through an oxic pathway in a representative oligotrophic lake.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Marion Kanwischer, Thomas Klintzsch, Oliver Schmale
Summary: Recent studies have shown that microbial methane production is not limited to strictly anoxic conditions and is widespread in the oxic water column. This study in the Baltic Sea used an MPn/13C-MPn tracer approach to assess the contribution of MPn to oxic methane formation. The results showed that MPn is a potent methanogenic substrate in the surface water, but most of it is degraded via alternative pathways, not releasing methane.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Agricultural Engineering
Irfan Ali Phulpoto, Yanfen Wang, Muneer Ahmed Qazi, Bowen Hu, Fabrice Ndayisenga, Zhisheng Yu
Summary: This study identified a novel oil-degrading Pseudomonas sp. S2WE strain capable of producing biosurfactants with great potential for reducing surface tension and emulsification. The extracted rhamnolipids showed high stability and emulsification properties, making them suitable for various industrial and environmental applications.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Junhong Li, Houquan Liu, Zeqin Liu, Xianhua Zhang, Ruth Elaine Blake, Zhiyong Huang, Minmin Cai, Fei Wang, Chan Yu
Summary: The mechanism of microbial-mediated degradation of methylphosphonate (MPn) was investigated using multi-labeled water isotope probing (MLWIP) and transcriptome analysis. It was found that Burkholderia sp. HQL1813 is capable of converting MPn into free methane, and phn gene clusters play a significant role in the cleavage of C-P bonds during this process.
ENVIRONMENTAL RESEARCH
(2023)
Article
Microbiology
Andreea Baricz, Cecilia Maria Chiriac, Adrian-Stefan Andrei, Paul-Adrian Bulzu, Erika Andrea Levei, Oana Cadar, Karina Paula Battes, Mirela Cimpean, Marin Senila, Adorjan Cristea, Vasile Muntean, Mircea Alexe, Cristian Coman, Edina Kriszta Szekeres, Cosmin Ionel Sicora, Artur Ionescu, David Blain, William Kenneth O'Neill, Jessica Edwards, John Edward Hallsworth, Horia Leonard Banciu
Summary: Ursu Lake in Central Romania is a stratified lake with three distinct water masses, hosting diverse microbial communities that play roles in carbon and sulfur cycles. The lake exhibits both dynamic fluctuations and stability in its microbial populations, which are influenced by factors such as water activity and redox potentials. This unique lake can serve as a modern analogue for ancient euxinic water bodies and a comparator system for other stratified hypersaline systems.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Microbiology
Dan-Dan Zhang, Ya-Nan Zhao, Rui-Han He, Yu-Qi Yan, Zong-Jun Du
Summary: A novel species of the genus Roseicella, named Roseicella aquatilis sp. nov., was isolated from mud sample in Jiugongli Lake, Inner Mongolia Autonomous Region, China. The strain NE82(T) has unique characteristics and 97.2% 16S rRNA gene sequence similarity to Roseicella frigidaeris DB1506(T).
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Environmental Sciences
Lingling Li, Andrea Fuchs, Sonia Herrero Ortega, Bin Xue, Peter Casper
Summary: The study on spatial distribution of CH4 in deep freshwater lakes reveals that the profundal zone has the highest CH4 content and production potential, while surface water CH4 is not closely related to the sediment production sites. Variations in sediment properties across the lake lead to restricted CH4 dynamics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Microbiology
A. Yu. Kallistova, A. I. Kosyakova, I. I. Rusanov, V. V. Kadnikov, A. V. Beletsky, D. D. Koval, S. K. Yusupov, I. Zekker, N. V. Pimenov
Summary: Seasonal cyanobacterial blooms have a negative impact on freshwater ecosystems. This study aims to identify the features of methanogenesis in the water column and sediments of a freshwater lake during cyanobacterial over-bloom. Cyanobacteria and SAR11 freshwater members were found to potentially contribute to aerobic methanogenesis, while hydrogenotrophic and acetoclastic pathways predominated in the sediments.
Article
Microbiology
Qi-Hang Zou, Xi Feng, Tao-Jie Wang, Zong-Jun Du
Summary: An aerobic, Gram-stain-negative, rod-shaped bacterium with flagellum, designated L22(T), isolated from sediment of Hulun Lake in Inner Mongolia, China, has been identified as a novel species within the genus Methylobrevis, named Methylobrevis albus sp. nov.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Microbiology
Wen-Ming Chen, Yi-Ru Xie, Soon-Wo Kwon, Shih-Yi Sheu
Summary: Bacterial strain BBQ-18(T) isolated from a freshwater lake in Taiwan belongs to the genus Flavobacterium and is proposed as a novel species named Flavobacterium undicola sp. nov. based on its distinct phylogenetic position and unique phenotypic characteristics.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Microbiology
Yuan Liu, Ya-Qi Chang, Chao-Nan Wang, Meng-Qi Ye, Ming-Yi Wang, Zong-Jun Du
Summary: BDHS18(T) is a novel species of the genus Moheibacter, named Moheibacter lacus sp. nov., isolated from the sediment of Hasuhai Lake in China. It grows optimally at 28-33°C, pH 7.5-8.0, and in the presence of approximately 1.0% NaCl.
CURRENT MICROBIOLOGY
(2021)
Article
Microbiology
Jaeho Song, Mirae Kim, Miri S. Park, Yochan Joung, Ilnam Kang, Jang-Cheon Cho
Summary: A novel bacterium belonging to the genus Uliginosibacterium, named Uliginosibacterium aquaticum sp. nov., was isolated from Chungju Lake in South Korea. It exhibited distinct biological characteristics and DNA sequence differences, representing a new species within the genus.
CURRENT MICROBIOLOGY
(2021)
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
Microbiology
A. Yu. Kallistova, D. D. Koval, V. V. Kadnikov, S. V. Toshchakov, S. K. Yusupov, A. O. Izotova, E. N. Vinogradova, I. Zekker, N. V. Pimenov
Summary: Eutrophication of lakes leads to increased methane emission, especially in littoral areas where the oxygen levels vary. The microbial communities in littoral areas, as well as the microorganisms involved in the methane cycle, are not well-studied. This study investigated methanogenesis and methane oxidation in a littoral site of Lake Senezh, Russia, using a combination of analytical, microbiological, and molecular techniques. The results revealed a diverse community of aerobic, facultative anaerobic, and anaerobic microorganisms capable of performing all reactions of the N, S, and CH4 cycles. Methane formation occurred through various pathways, and methane oxidation was predominantly carried out by type I methanotrophs, with type II nitrate- and nitrite-dependent methanotrophs also present. The study suggests that all potential methane formation in the littoral site of the lake could be simultaneously oxidized.
Article
Environmental Sciences
Teresa Einzmann, Moritz Schroll, Jan F. Kleint, Markus Greule, Frank Keppler
Summary: This study investigates the concentrations and isotopic composition of methane in a eutrophic lake with seasonal stratification. The findings reveal the spatial and temporal dynamics of methane sources and sinks in the lake, including the impact of aerobic methane oxidation, different methane formation pathways, and the influence of groundwater input.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Microbiology
Qian Wang, Yoon-Suk Kang, Abdullah Alowaifeer, Kaixiang Shi, Xia Fan, Lu Wang, Jonathan Jetter, Brian Bothner, Gejiao Wang, Timothy R. McDermott
ENVIRONMENTAL MICROBIOLOGY
(2018)
Article
Environmental Sciences
Kaixiang Shi, Qian Wang, Xia Fan, Gejiao Wang
ENVIRONMENTAL POLLUTION
(2018)
Article
Multidisciplinary Sciences
Michael Coryell, Mark McAlpine, Nicholas V. Pinkham, Timothy R. McDermott, Seth T. Walk
NATURE COMMUNICATIONS
(2018)
Article
Microbiology
Rachel A. Rawle, Yoon-Suk Kang, Brian Bothner, Gejiao Wang, Timothy R. McDermott
ENVIRONMENTAL MICROBIOLOGY
(2019)
Review
Environmental Sciences
Timothy R. McDermott, John F. Stolz, Ronald S. Oremland
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2020)
Review
Microbiology
Kaixiang Shi, Qian Wang, Gejiao Wang
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Microbiology
Rachel A. Rawle, Monika Tokmina-Lukaszewska, Zunji Shi, Yoon-Suk Kang, Brian P. Tripet, Fang Dang, Gejiao Wang, Timothy R. McDermott, Valerie Copie, Brian Bothner
Article
Biotechnology & Applied Microbiology
Weiping Zhuang, Narayanaganesh Balasubramanian, Lu Wang, Qian Wang, Timothy R. McDermott, Valerie Copie, Gejiao Wang, Brian Bothner
Summary: This study utilized LC-MS to track metabolic and lipid profile changes in Agrobacterium tumefaciens GW4 when exposed to As(V) under low phosphate conditions. The research revealed altered oxidative stress response pathways and increased DNA repair under As(V) exposure. Lipidomics analysis showed a decrease in most glycerophospholipids but an increase in certain glycerolipid classes, potentially indicating a phosphate-sparing growth strategy.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Toxicology
Qian Wang, Timothy R. McDermott, Seth T. Walk
Summary: This study demonstrates that by genetically defining the gut microbiome of mice, significant alterations in mammalian host arsenic exposure can be achieved, protecting mammals from acute toxicity exposure.
TOXICOLOGICAL SCIENCES
(2021)
Article
Microbiology
Rachel Rawle, Tara C. Saley, Yoon-Suk Kang, Qian Wang, Seth Walk, Brian Bothner, Timothy R. McDermott
Summary: This study investigates the role of microbial ars operon in Agrobacterium tumefaciens 5A and finds that ArsR proteins exhibit a global transcription regulation beyond the traditional ars operon model. Each ArsR protein has its own unique regulatory profile, and a regulatory hierarchy is observed among them. The study also reveals that arsenic has a broad impact on microbial metabolism, influencing various cellular functions.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Multidisciplinary Sciences
Qian Wang, Abdullah Alowaifeer, Patricia Kerner, Narayanaganesh Balasubramanian, Angela Patterson, William Christian, Angela Tarver, John E. Dore, Roland Hatzenpichler, Brian Bothner, Timothy R. McDermott
Summary: Reports of biogenic methane synthesis associated with various organisms have accumulated, but understanding of the process at the genetic and enzyme levels remains limited. The methane paradox of CH4 supersaturation in oxic surface waters in marine and freshwater environments challenges the traditional view of strictly anaerobic CH4 synthesis. Recent interest in the phenomenon highlights the importance of comprehending sources and sinks of this potent greenhouse gas.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Microbiology
Jingxin Li, Yushan Han, Wei Guo, Qian Wang, Shuijiao Liao, Gejiao Wang
ARCHIVES OF MICROBIOLOGY
(2018)