Article
Engineering, Environmental
Jiang Xu, Garret D. Bland, Yuan Gu, Hasti Ziaei, Xiaoyue Xiao, Amrika Deonarine, Danny Reible, Paul Bireta, Thomas P. Hoelen, Gregory Lowry
Summary: The study found that marine sediments contained 20-50% of total Hg in the <0.5 µm size fraction, while terrestrial and river sediments only contained 0.5-3.0% in this fraction. X-ray absorption spectroscopy revealed that metacinnabar (beta-HgS) was the main mercury species in marine sediment, while organic Hg-thiol (Hg(SR)(2)) was predominant in terrestrial sediment. Single-particle inductively coupled plasma time-of-flight mass spectrometry analysis indicated that half of the Hg in the <0.5 µm size fraction of marine sediment existed as individual nanoparticles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Geoffrey Millard, Chris S. Eckley, Todd P. Luxton, David Krabbenhoft, Jennifer Goetz, John McKernan, John DeWild
Summary: This study measured mercury methylation and demethylation rates using stable isotope tracers in sediments and water of a shallow branch of the Nacimiento Reservoir. The results showed high methylmercury concentrations in the hypolimnetic waters and higher methylation rates in littoral sediments during late summer. Modelled results indicated that the remaining hypolimnetic methylmercury could originate from profundal sediments, highlighting the importance of addressing methylation in both the water column and sediment for remediation strategies.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Caili Du, Guowen Li, Rui Xia, Caole Li, Qiuheng Zhu, Xiaoguang Li, Jiaxi Li, Chen Zhao, Zhenjun Tian, Lieyu Zhang
Summary: Cyanobacterial blooms are important environmental problems in aquatic ecosystems. In-depth research on the mechanism of cyanobacterial blooms is urgently needed. The study reveals the interactions between environmental conditions, microbial communities, and cyanobacteria, with cyanobacteria having competitive advantages and antagonistic effects on other microorganisms when resources are abundant.
ENVIRONMENTAL POLLUTION
(2022)
Review
Biotechnology & Applied Microbiology
Shehla Amin, Sardar Khan, Tasneem Sarwar, Javed Nawab, Muhammad Amjad Khan
Summary: This paper focuses on the contamination of mercury in degraded soil in mining areas, its impact on rice growth, and human health. It reveals that rice grown in damaged areas contain high levels of methylmercury, posing potential risks to human health.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Jose Lourenco Friedmann Angeli, Julie Rosemberg Sartoretto, Bianca Sung Mi Kim, Paulo Alves de Lima Ferreira, Beatriz Benedetti, Michel Michaelovitch de Mahiques, Rubens Cesar Lopes Figueira
Summary: The present study found historical anthropogenic mercury accumulation in the Santos estuary, with large spatial and temporal variations in mercury distribution. The highest contamination was observed in the upper estuary, with industrial activities being the primary source of mercury pollution.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Pan Guo, Heinz Rennenberg, Hongxia Du, Tao Wang, Lan Gao, Emmanouil Flemetakis, Robert Hansch, Ming Ma, Dingyong Wang
Summary: The plant microbiota in paddy soil can influence plant health and fitness by promoting methylmercury (MeHg) production. However, the effect of rice rhizosphere assemblages on MeHg production remains unclear. This study used network analyses of microbial diversity to investigate the bacterial networks in bulk soil, rhizosphere, and roots during rice development at different Hg gradients. The results showed that Hg gradients significantly affected the niche-sharing of taxa related to MeHg/THg, while plant development had minimal effect. The complexity and connectivity of root microbial networks increased with an Hg concentration of 30 mg kg-1 in the soil.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Microbiology
Marek Snirc, Ivona Janco, Martin Hauptvogl, Silvia Jakabova, Lenka Demkova, Julius Arvay
Summary: Wild-growing edible mushrooms are biologically valuable but pose a risk due to their high capacity for accumulating potential risk elements and pollutants from the environment.
Article
Marine & Freshwater Biology
Yu Deng, Andries Debognies, Qi Zhang, Zhenyan Zhang, Zhigao Zhou, Jinfeng Zhang, Liwei Sun, Tao Lu, Haifeng Qian
Summary: This study evaluated the effects of Ofloxacin on photosynthetic microorganisms and aquatic microbial communities. The results showed that Ofloxacin inhibited the growth of Microcystis aeruginosa and altered the structure and species interaction of the microbial community. This suggests that the residual Ofloxacin can disturb the balance of aquatic ecosystems.
AQUATIC TOXICOLOGY
(2022)
Article
Environmental Sciences
Vanessa S. de Carvalho, Caio S. A. Felix, Jucelino B. Junior da Silva, Olivia M. . C. de Oliveira, Jailson B. de Andrade, Sergio L. . C. Ferreira
Summary: This study quantifies total mercury in sediments from the Joanes River in Bahia, Brazil, comparing periods with and without rain. Direct Mercury Analysis (DMA) was used, and its accuracy was confirmed with certified reference materials. The highest mercury concentrations were found near commercial areas and large residential condominiums, while the lowest levels were found near a mangrove region. The geoaccumulation index indicated low contamination in the studied area. The contamination factor showed moderate contamination in four out of seven sampling stations during the rainy season. The results of ecological risk assessment were consistent with the contamination factor data, confirming the concentration of mercury in smaller sediment particles due to adsorption processes.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Steven Doherty, Isabelle Rueegsegger, Matthew K. Tighe, Luke A. Milan, Susan C. Wilson
Summary: This study assessed antimony and arsenic contamination in sediments, finding differences in particle size distributions of Sb and As in different sediments. Arsenic concentrations were highest in fine particles across various river environments, while antimony concentrations varied in particle size fractions across different regions.
ENVIRONMENTAL POLLUTION
(2022)
Article
Microbiology
Yaqiu Liu, Yuefei Li, Jie Li, Qiong Zhou, Xinhui Li
Summary: In this study, the gut microbiome of black Amur bream (Megalobrama terminalis) in different geographic populations in southern China was analyzed using high-throughput sequencing. The results showed differences in gut microbiome composition and diversity among populations. Seasonal variation, influenced by water temperature, salinity, and gonadosomatic index, caused taxon shifts in the gut bacterial community. Both geographic isolation and seasonal variation significantly impacted the metabolic functions of the fish gut microbiome. Each geographic population exhibited its own unique regulation pattern of the gut microbiome to enhance adaptive capability in the resident environment.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Engineering, Environmental
Zhengtao Shen, Zhuorong Zhang, Mengdi Zhang, Joerg Rinklebe, Yan Ma, Deyi Hou
Summary: The use of rice husk biochar at different production temperatures and particle sizes can effectively reduce runoff and soil erosion on mercury-contaminated soil, decreasing the concentration of mercury in runoff and soil. Higher pyrolysis temperature of the biochar results in less runoff, more infiltration, and better erosion prevention, while the effect of biochar particle size is less significant.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
David J. Beale, Andrew Bissett, Sandra Nilsson, Utpal Bose, Joost Laurus Dinant Nelis, Akhikun Nahar, Matthew Smith, Viviana Gonzalez-Astudillo, Christoph Braun, Brenda Baddiley, Suzanne Vardy
Summary: This study investigated the impact of PFAS contamination on wild animals using the gut microbiome of freshwater turtles, revealing changes in microbial community composition and biochemical functional outputs in response to PFAS exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Xiaosong Tian, Guanqun Chai, Qing Xie, Guanghui Li
Summary: Biochar has been receiving increased research attention for its effectiveness in mitigating mercury risks in agricultural soils. However, there is a lack of consensus on the impact of pristine biochar on methylmercury production, availability, and accumulation in paddy rice-soil system. A meta-analysis was conducted with 189 observations, revealing that biochar application could significantly increase methylmercury production in paddy soil, while decreasing its availability. Furthermore, biochar application inhibited methylmercury accumulation in paddy rice.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Tao Sun, Qing Xie, Chuxian Li, Jinyong Huang, Caipeng Yue, Xuejie Zhao, Dingyong Wang
Summary: Both inorganic and organic fertilizers increase the concentration of methylmercury (MeHg) in rice grains, but through different mechanisms. Inorganic fertilizers enhance mercury methylation by increasing the bioavailability of mercury and the relative amount of Hg-methylating microbes. In contrast, organic matter in organic fertilizers is the main driver for the increase in MeHg concentrations in rice grains and can also immobilize mercury in soil.
ENVIRONMENTAL POLLUTION
(2022)
Article
Microbiology
Wenjing Liu, Emily B. Graham, Linghao Zhong, Jianwei Zhang, Shijie Li, Xiangui Lin, Youzhi Feng
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Engineering, Environmental
Vanessa A. Garayburu-Caruso, James C. Stegen, Hyun-Seob Song, Lupita Renteria, Jaqueline Wells, Whitney Garcia, Charles T. Resch, Amy E. Goldman, Rosalie K. Chu, Jason Toyoda, Emily B. Graham
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2020)
Review
Environmental Sciences
Dan Naylor, Natalie Sadler, Arunima Bhattacharjee, Emily B. Graham, Christopher R. Anderton, Ryan McClure, Mary Lipton, Kirsten S. Hofmockel, Janet K. Jansson
ANNUAL REVIEW OF ENVIRONMENT AND RESOURCES, VOL 45
(2020)
Article
Environmental Sciences
Andrew E. Plymale, Jacqueline R. Wells, Carolyn I. Pearce, Colin J. Brislawn, Emily B. Graham, Tanya E. Cheeke, Jessica L. Allen, Sarah J. Fansler, Bruce W. Arey, Mark E. Bowden, Danielle L. Saunders, Vincent G. Danna, Kimberly J. Tyrrell, Jamie L. Weaver, Rolf Sjoblom, Rick Paul, John S. McCloy, Eva Hjarthner-Holdar, Mia Englund, Erik Ogenhall, David K. Peeler, Albert A. Kruger
Summary: Microbial colonization on ancient anthropogenic glass can impact glass durability, with distinct microbial communities found on vitrified walls of the pre-Viking era hillfort Broborg in Sweden compared to adjacent soil. These organisms display potential bio-corrosive properties but may also have a homeostatic function that could limit glass alteration over time.
GEOMICROBIOLOGY JOURNAL
(2021)
Article
Microbiology
Hyun-Seob Song, James C. Stegen, Emily B. Graham, Joon-Yong Lee, Vanessa A. Garayburu-Caruso, William C. Nelson, Xingyuan Chen, J. David Moulton, Timothy D. Scheibe
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Microbiology
Wenjing Liu, Emily B. Graham, Yang Dong, Linghao Zhong, Jianwei Zhang, Chongwen Qiu, Ruirui Chen, Xiangui Lin, Youzhi Feng
Summary: The study investigated the influence of stochastic and deterministic assembly processes in different agroecosystems, finding that deterministic processes favor microorganisms with similar functions, while stochastic processes lead to functional divergence. Maintaining a balance between stochastic and deterministic processes is crucial for the services of agroecosystems.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Soil Science
Joseph E. Knelman, Steve K. Schmidt, Emily B. Graham
Summary: The study revealed common patterns in cyanobacterial community composition in early soils, highlighting the importance of cyanobacteria in ecosystem development at glacier forefields. Furthermore, a phosphorus addition experiment suggests phosphorus limitation as a mechanism restricting the presence of Nostocales in these emerging landscapes.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Review
Ecology
Emily B. Graham, Colin Averill, Ben Bond-Lamberty, Joseph E. Knelman, Stefan Krause, Ariane L. Peralta, Ashley Shade, A. Peyton Smith, Susan J. Cheng, Nicolas Fanin, Cathryn Freund, Patricia E. Garcia, Sean M. Gibbons, Marc W. Van Goethem, Marouen Ben Guebila, Julia Kemppinen, Robert J. Nowicki, Juli G. Pausas, Samuel P. Reed, Jennifer Rocca, Aditi Sengupta, Debjani Sihi, Marie Simonin, Michal Slowinski, Seth A. Spawn, Ira Sutherland, Jonathan D. Tonkin, Nathan I. Wisnoski, Samuel C. Zipper
Summary: Disturbances cause fundamental changes in ecosystem functions, but there is a lack of unified foundation for discussing and quantifying the complexity of disturbances across interdisciplinary perspectives. By identifying a key limitation in disturbance ecology, researchers have developed a generalizable framework to understand disturbances and their impacts, which can be supplemented by discipline-specific variables to benefit both inter- and intra-disciplinary research. This framework provides a baseline standard for comparing disturbances across different fields and encourages explicit definition of disturbance drivers and impacts to support future syntheses and meta-analyses of disturbance research.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
Emily B. Graham, Kirsten S. Hofmockel
Summary: Coupled biogeochemical cycles play a crucial role in ecosystem ecology, influencing behaviors at individual and community scales. Developing process-based models that accurately capture these dynamics, especially in SOM decomposition, remains a challenge. Ecological stoichiometry offers a framework for merging biogeochemical and microbiological models and advancing omics-enabled biogeochemical models. Collaboration and exchange of information between high-resolution investigations and large-scale models is essential for refining objectives and specifying dynamics in the field of SOM decomposition modeling.
Article
Engineering, Civil
Xingyuan Chen, Raymond Mark Lee, Dipankar Dwivedi, Kyongho Son, Yilin Fang, Xuesong Zhang, Emily Graham, James Stegen, Joshua B. Fisher, David Moulton, Timothy D. Scheibe
Summary: Watersheds are crucial for water supply and ecosystem health, yet there is a lack of quantification in studying the impacts of extreme events. It is essential to understand the effects of environmental perturbations on watershed systems and develop a data-model fusion system for assessment and parameterization.
JOURNAL OF HYDROLOGY
(2021)
Article
Microbiology
Ruonan Wu, Michelle R. Davison, William C. Nelson, Emily B. Graham, Sarah J. Fansler, Yuliya Farris, Sheryl L. Bell, Iobani Godinez, Jason E. Mcdermott, Kirsten S. Hofmockel, Janet K. Jansson
Summary: Soil viruses were compared in grassland soils with different historical precipitation levels, revealing higher viral diversity and abundance in areas with lower precipitation. The drier region also exhibited more lysogenic markers and putative auxiliary metabolic genes, indicating a potential impact of historical precipitation on soil viral communities and their functional potential.
Article
Geosciences, Multidisciplinary
Jesse Alan Roebuck, Kevin D. Bladon, David Donahue, Emily B. Graham, Samantha Grieger, Karl Morgenstern, Matthew J. Norwood, Katie A. Wampler, Lisa Erkert, Lupita Renteria, Robert Danczak, Susan Fricke, Allison N. Myers-Pigg
Summary: The warmer and drier climate has led to an increase in large, high severity wildfires in the Pacific Northwest, raising concerns about water quality and ecosystem recovery. This study quantified the spatiotemporal patterns of dissolved organic matter (DOM) chemistry in streams burned by wildfires in Oregon, USA in 2020. The results showed that the composition of DOM was temporally variable and linked with burn severity, suggesting distinct gradients of burn severity impact DOM dynamics immediately following fire activity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Ecology
Emily B. Graham, Joseph E. Knelman
Summary: Understanding the processes of microbial community assembly is crucial for comprehending the role of microorganisms in ecosystem restoration and for optimizing management strategies. Important factors to consider when evaluating microbial community structure in the context of ecosystem recovery include: variations in community assembly processes, linkages to ecosystem function, and measurable microbial community attributes.
Article
Engineering, Environmental
Anna B. Turetcaia, Vanessa A. Garayburu-Caruso, Matthew H. Kaufman, Robert E. Danczak, James C. Stegen, Rosalie K. Chu, Jason G. Toyoda, M. Bayani Cardenas, Emily B. Graham
Summary: This study investigates the impact mechanisms of carbon and nitrogen limitations on dissolved organic matter (DOM) metabolism in hyporheic zones (HZs). The results show that the thermodynamics of DOM and organic nitrogen are relevant at different depths in the HZ, suggesting that aerobic respiration (AR) is limited by multiple competing processes in the HZ.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
Emily B. Graham, Hyun-Seob Song, Samantha Grieger, Vanessa A. Garayburu-Caruso, James C. Stegen, Kevin D. Bladon, Allison N. Myers-Pigg
Summary: Pyrogenic organic matter (PyOM) from wildfires is resistant to biological degradation, but recent studies suggest that it may be more bioavailable than previously thought. This study used a substrate-explicit model to assess the potential bioavailability of representative PyOM compounds compared to dissolved organic matter (DOM). The results showed that PyOM has a greater range of potential bioavailability than natural DOM, but the predicted thermodynamics and metabolic rates were similar between the two. The study also found that different chemistries within PyOM have varying carbon use efficiencies, which could impact process-based model representations.