Article
Geochemistry & Geophysics
David W. Graham, Peter J. Michael, Thi B. Truong
Summary: We analyzed the carbon isotope composition of vesicle CO2, He isotopes and concentrations in basalts from Loihi Seamount, and found that alkali basalts have a wider range of carbon isotope composition compared to tholeiites and transitional basalts. The restricted range of carbon isotope values for Loihi basalts suggests a degassing process, but the similarity to other mantle-derived basalts presents a conundrum. The high carbon isotope values in Loihi basalts may be due to primordial carbon isotope heterogeneity, exchange of carbon at the core-mantle boundary, or the presence of recycled carbonate in the Hawaiian plume source region.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Biotechnology & Applied Microbiology
C. P. Casar, L. M. Momper, B. R. Kruger, M. R. Osburn
Summary: This study investigated the potential for iron cycling among microbial communities in iron-rich fracture fluids at a depth of 1.5 km in the continental crust. By using optimized annotation pipelines, the researchers revealed previously missed iron cycling potential and highlighted the importance of iron as an energy source across the system. The findings suggest that choosing appropriate tools for detecting key metabolic processes like iron cycling is crucial for understanding microbial communities in diverse environments.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Multidisciplinary Sciences
Eric C. Dunham, John E. Dore, Mark L. Skidmore, Eric E. Roden, Eric S. Boyd
Summary: Life in environments without photosynthesis relies on chemical energy, and understanding how chemical nutrients from the geosphere fuel chemosynthetic biospheres is crucial for studying life distribution and diversity. The study shows that basaltic glacial catchments have higher concentrations of dissolved H-2, leading to microbial communities with faster rates of H-2 oxidation and CO2 fixation. Differences in bedrock mineral composition can impact nutrient availability and microbial diversity, abundance, and activity.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Environmental Sciences
Marco Mantovani, Elena Collina, Marina Lasagni, Francesca Marazzi, Valeria Mezzanotte
Summary: The study investigated the production of microalgal-based iron nanoparticles (ME-nFe) from microalgae grown in wastewater treatment plants to improve the removal of heavy metals from the treated effluent. It found that ME-nFe had high sorbent power and effectively removed copper, zinc, cadmium, and nickel, but had limited removal efficiency for total chromium.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Microbiology
Amanda Stromecki, Laura Murray, Heather Fullerton, Craig L. Moyer
Summary: Crater Lake in Oregon is a unique freshwater lake fed by thermally and chemically enriched hydrothermal springs. This study examines the community structure of microbial mats in the lake's hydrothermal springs and reveals a relatively homogeneous yet diverse bacterial community. The study suggests that iron and sulfur inputs play a potential role in the primary productivity of the mats. Several taxa are identified as autotrophic drivers of the community, including Gallionella, Mariprofundus, Sulfuricurvum, Thiobacillus, and Nitrospira. The study also detects the presence of genes related to arsenic detoxification and denitrification processes, suggesting their co-occurrence in addition to different modes of carbon fixation in the mats.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Ting Gao, Jiawen Zhou, Peiyu Zhang, Wenyong Wang, Tong Zhou, Zhu Li, Peter Christie, Longhua Wu
Summary: This study investigated the distribution patterns and underlying mechanisms of cadmium (Cd) isotope fractionation within soil profiles around a lead-zinc mine in southwest China. The results revealed that mining activity was the main source of Cd, which led to vertical migration of Cd isotopes within the soil profiles. The Cd isotope fractionation was correlated with the content of free iron and manganese oxides in the soil, indicating their role in the migration of Cd isotopes. This study highlights the importance of considering Cd mobilization and transport in soil profiles when using isotope techniques to trace metal sources.
ENVIRONMENTAL POLLUTION
(2022)
Article
Biology
Arola Moreras-Marti, Mark Fox-Powell, Aubrey L. Zerkle, Eva Stueeken, Fernando Gazquez, Helen E. A. Brand, Toni Galloway, Lotta Purkamo, Claire R. Cousins
Summary: Studying geothermal pools in Iceland reveals that volcanic processes play a significant role in controlling the geochemistry and microbial community structure. The pools in Kerlingarfjoll and Kverkfjoll exhibit different water chemistry, sediment composition, and dominant microbial metabolisms, influenced by volcanic processes and water input from glaciers. This research provides insights into the potential habitability of relic hydrothermal systems on Mars and their significance in supporting chemolithotrophic life.
Article
Geochemistry & Geophysics
Ann G. Dunlea, Logan A. Tegler, Bernhard Peucker-Ehrenbrink, Ariel D. Anbar, Stephen J. Romaniello, Tristan J. Horner
Summary: The study presents a record of changes in hydrogenous iron isotopes since the late Cretaceous derived from pelagic clays, showing a dynamic Fe cycle in the water column overlying Site U1366 over the past 95 million years. Early Fe isotope trends are interpreted as reflecting changes in hydrothermal Fe with distance from the ridge, while a transition to a dust-like source is identified after 50 Ma.
Article
Chemistry, Multidisciplinary
Young-Hyun Song, Syarif Hidayat, Agus Jatnika Effendi, Joo-Yang Park
Summary: A novel Microbial Reverse-Electrodialysis Electrolysis Struvite-Precipitation Cell (MRESC) has been developed for energy recovery through simultaneous struvite crystallization and hydrogen production. The system demonstrated high Coulombic efficiency and COD removal with an overall energy efficiency of 28%, proving to be an effective bioelectrochemical method for energy recovery.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Review
Biotechnology & Applied Microbiology
Maria Gallego-Garcia, Ana Susmozas, Maria Jose Negro, Antonio D. Moreno
Summary: Biodiesel is a renewable alternative to fossil-based diesel, contributing to sustainability by reducing greenhouse gas emissions. The current production of biodiesel has high costs and competes with food supply, but using sugars from lignocellulosic wastes to produce microbial oil shows promise as a cost-effective solution.
MICROBIAL CELL FACTORIES
(2023)
Article
Green & Sustainable Science & Technology
Yao Lu, Liang Zhang, Xiaoyu Zuo, Beibei Yan, Xiujin Li, Hairong Yuan
Summary: This study investigated the depolymerization products, biomethane production, and microbial community of corn stover depolymerized with urea using a hydrothermal approach. The addition of urea facilitated the breakage of the ester bonds in lignocellulose structure, increasing the levels of volatile fatty acids and phenol. Depolymerization with 2% urea and 10 min of hydrothermal time produced higher cumulative biomethane yield. The combined depolymerization enhanced the acetate-methane pathway by promoting the growth of specific microbial species, resulting in increased biomethane production.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Dan Wan, Fei-Fei Liu, Jiu-Bin Chen, Andreas Kappler, Yakov Kuzyakov, Cong-Qiang Liu, Guang-Hui Yu
Summary: The generation of reactive oxygen species (ROS) mediated by minerals and/or microorganisms has a significant impact on carbon and nutrient cycles at soil-water interfaces. Microorganisms primarily drive the production of hydroxyl radical (HO') by modulating iron redox transformation, rather than directly producing ROS. Certain genera, such as Geobacter, Paucimonas, Rhodocyclaceae_K82, and Desulfotomaculum, play a crucial role in HO' production.
Article
Microbiology
Ying-Wen Zhong, Peng Zhou, Hong Cheng, Ya-Dong Zhou, Jie Pan, Lin Xu, Meng Li, Chun-Hui Tao, Yue-Hong Wu, Xue-Wei Xu
Summary: This study provides new insights into microbial activities and potential mineral-microorganism interactions in hydrothermal vents, through deep metagenomic sequencing of samples from an active black smoker and a diffuse vent in the Longqi hydrothermal region.
MICROBIOLOGY SPECTRUM
(2022)
Article
Environmental Sciences
Tetyana Milojevic, Mihaela Albu, Denise Kolbl, Gerald Kothleitner, Robert Bruner, Matthew L. Morgan
Summary: Multiple lines of evidence suggest an active hydrogeological history of Mars and environments suitable for chemolithoautotrophy. Future missions aim to search for signs of ancient life on Mars. Laboratory-scaled research on Noachian Martian breccia revealed microbial-assisted biotransformation, providing insight into the distribution of meteorite inorganic constituents in microbial cells.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Ingrid Rodriguez-Gutierrez, Karen Cristina Bedin, Beatriz Mourino, Joao Batista Souza Junior, Flavio Leandro Souza
Summary: This article provides a critical assessment of hydrothermal and polymeric precursor methods for designing photoelectrodes for future industrial implementation. The main conditions and strategies that can affect the photoelectrochemical performance are highlighted.
Review
Ecology
Federico Baltar, Barbara Bayer, Nina Bednarsek, Stacy Deppeler, Ruben Escribano, Carolina E. Gonzalez, Roberta L. Hansman, Rajani Kanta Mishra, Mary Ann Moran, Daniel J. Repeta, Carol Robinson, Eva Sintes, Christian Tamburini, Luis E. Valentin, Gerhard J. Herndl
TRENDS IN ECOLOGY & EVOLUTION
(2019)
Article
Microbiology
Barbara Bayer, Roberta L. Hansman, Meriel J. Bittner, Beatriz E. Noriega-Ortega, Jutta Niggemann, Thorsten Dittmar, Gerhard J. Herndl
ENVIRONMENTAL MICROBIOLOGY
(2019)
Article
Chemistry, Analytical
Cajetan Neubauer, Antoine Cremiere, Xingchen T. Wang, Nivedita Thiagarajan, Alex L. Sessions, Jess F. Adkins, Nathan F. Dalleska, Alexandra V. Turchyn, Josephine A. Clegg, Annie Moradian, Michael J. Sweredoski, Spiros D. Garbis, John M. Eiler
ANALYTICAL CHEMISTRY
(2020)
Article
Geosciences, Multidisciplinary
Peter M. J. Douglas, Regina Gonzalez Moguel, Katey M. Walter Anthony, Martin Wik, Patrick M. Crill, Katherine S. Dawson, Derek A. Smith, Ella Yanay, Max K. Lloyd, Daniel A. Stolper, John M. Eiler, Alex L. Sessions
GEOPHYSICAL RESEARCH LETTERS
(2020)
Review
Environmental Sciences
Tom Cresswell, Marc Metian, Nicholas S. Fisher, Sabine Charmasson, Roberta L. Hansman, Wokil Bam, Christian Bock, Peter Wolfgang Swarzenski
FRONTIERS IN MARINE SCIENCE
(2020)
Review
Environmental Sciences
Sasha Wagner, Florence Schubotz, Karl Kaiser, Christian Hallmann, Hannelore Waska, Pamela E. Rossel, Roberta Hansmann, Marcus Elvert, Jack J. Middelburg, Anja Engel, Thomas M. Blattmann, Teresa S. Catala, Sinikka T. Lennartz, Gonzalo Gomez-Saez, Silvio Pantoja-Gutierrez, Rui Bao, Valier Galy
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Geochemistry & Geophysics
Guillaume Paris, Woodward W. Fischer, Jena E. Johnson, Samuel M. Webb, Theodore M. Present, Alex L. Sessions, Jess F. Adkins
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Geochemistry & Geophysics
L. Chimiak, J. E. Elsila, B. Dallas, J. P. Dworkin, J. C. Aponte, A. L. Sessions, J. M. Eiler
Summary: Meteorites contain bio-relevant organic compounds, with alanine's synthetic history influenced by interstellar and interstellar-medium sources. Predictive models suggest a specific synthetic network may have produced a variety of prebiotic compounds in the early solar system.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Hao Xie, Camilo Ponton, Michael J. Formolo, Michael Lawson, Geoffrey S. Ellis, Michael D. Lewan, Alexandre A. Ferreira, Erica T. Morais, Andre L. D. Spigolon, Alex L. Sessions, John M. Eiler
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Biochemical Research Methods
Alexandra A. Phillips, Fenfang Wu, Alex L. Sessions
Summary: A sensitive and precise method has been developed for measuring the natural-abundance sulfur isotopic compositions of cysteine and methionine isolated from biological samples. This method enables diverse applications of sulfur isotopes in amino acids and proteins, ranging from tracing in organisms and the environment to studying fundamental aspects of metabolism and biosynthesis.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2021)
Article
Multidisciplinary Sciences
M. K. Lloyd, E. Trembath-Reichert, K. S. Dawson, S. J. Feakins, M. Mastalerz, V. J. Orphan, A. L. Sessions, J. M. Eiler
Summary: Microbial degradation of coal may limit microbial methane production, with deep biosphere communities potentially involved in the transformation of plant matter to coal. The abundance of methoxyl groups influences coal-bed methane yield, and carbon isotopic enrichments from microbial methylotrophy explain the carbon-13 content differences between microbial methane and coals or conventional hydrocarbon deposits.
Article
Biochemical Research Methods
Elise B. Wilkes, Alex L. Sessions, Sarah S. Zeichner, Brooke Dallas, Brian Schubert, A. Hope Jahren, John M. Eiler
Summary: This study introduces an Orbitrap-based method for analyzing the position-specific carbon isotope variation in serine, with potential applications in probing plant metabolism. The method shows promise for extending to other amino acids, opening up new possibilities for research in this area.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Multidisciplinary Sciences
Alexandra A. Phillips, Margot E. White, Michael Seidel, Fenfang Wu, Frank F. Pavia, Preston C. Kemeny, Audrey C. Ma, Lihini I. Aluwihare, Thorsten Dittmar, Alex L. Sessions
Summary: Marine dissolved organic matter (DOM) is a major reservoir that connects global carbon, nitrogen, and phosphorus cycles, and it is also the largest water column reservoir of organic sulfur. By analyzing the isotope ratios of different sources of dissolved organic sulfur (DOS), researchers found that DOS in the ocean mainly comes from phytoplankton-derived biomolecules rather than from sulfidic sediments. This study suggests that organic sulfur plays an important role in marine biogeochemistry beyond sulfate.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Sarah S. Zeichner, Laura Chimiak, Jamie E. Elsila, Alex L. Sessions, Jason P. Dworkin, Jose C. Aponte, John M. Eiler
Summary: The Murchison meteorite is a carbonaceous chondrite with high concentrations of amino acids. Previous studies proposed different formation mechanisms for the extraterrestrial amino acids, including Strecker synthesis, Michael addition, and reductive amination. Carbon isotope analysis of specific molecular sites reveals that the amino acids in Murchison were formed from different synthesis mechanisms, highlighting the complexity of extraterrestrial organic synthesis networks.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Meeting Abstract
Zoology
T. H. Naragon, A. K. Bruckner, R. S. Wijker, A. L. Sessions, J. Parker
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2020)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)