Article
Environmental Sciences
Yan Ma, Xiufang Shang, Ying Zhao, Xufei Lu, Xueyu Liu
Summary: Large amounts of secondary pollutants can be released during traditional composting. A 14-hour high-temperature fermentation process using a bioreactor and rice husk was found to effectively stabilize food waste. The transformations of the waste were analyzed using various methods, and it was found that the degradation of carbohydrates, proteins, and aliphatic compounds occurred after 4 hours of fermentation. The process followed first-order kinetic equations with specific reaction rate constants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Ecology
Constantinos Xenophontos, W. Stanley Harpole, Kirsten Kuesel, Adam Thomas Clark
Summary: Cheaters in microbial communities can stabilize the community and potentially be a precursor to cooperation rather than extinction.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Economics
Ludivine Martin, Uyen T. Nguyen-Thi, Caroline Mothe
Summary: This study examines the relationship between employee perceived external employability and turnover intention, and the moderating effects of age on human resource practices. Findings suggest that motivation-enhancing HR practices benefit younger and middle-aged employees more, while flexibility-enhancing HR practices are more effective for middle-aged and older employees. Additionally, motivation-enhancing practices help retain highly employable younger employees, while flexibility-enhancing practices are key in retaining highly employable older employees.
Article
Environmental Sciences
Ziying Hu, Xianyang Shi, Hong Jiang
Summary: The study demonstrates that temperature is the most important factor influencing the properties of hydrochar and DOM under hydrothermal carbonization conditions. DOM released by hydrochar at a low temperature mainly contains protein substances that promote microbial growth, while DOM released at a high temperature contains humic substances toxic to microorganisms.
Review
Engineering, Environmental
Yuwen Qi, Huimin Cao, Weijie Pan, Cuiping Wang, Yanna Liang
Summary: This article reviews the influence of soil- and water-derived dissolved organic matter (DOM) on the environmental fate of polyfluoroalkyl substances (PFAS). DOM plays a bidirectional role in the adsorption, degradation, and plant uptake of PFAS, depending on its types and functional groups. It is important to enhance the positive role of DOM in reducing the environmental risks posed by PFAS.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Biology
Shawna Smith, Amina Mohamed, Jeferson Ribeiro Amaral, Nana Kusi, Alexander Smith, Swanne P. Gordon, Andres Lopez-Sepulcre
Summary: Eco-evolutionary theory has sparked interest in the rapid evolution of functional traits, including diet. This study investigates the hereditary basis and rapid evolution of diet preference in Trinidadian guppies. F2 common garden descendants from high-predation and low-predation environments showed that diet preference rapidly evolved in the introduced population within 12 years.
Article
Microbiology
Ying Wang, Roland C. Wilhelm, Tami L. Swenson, Anita Silver, Peter F. Andeer, Amber Golini, Suzanne M. Kosina, Benjamin P. Bowen, Daniel H. Buckley, Trent R. Northen
Summary: Microorganisms' life-history strategies have a significant impact on the processing of organic carbon, which in turn influences microbial interactions and carbon cycling in soils. High rrn isolates have a greater potential for resource competition and tend to consume a wider variety and larger quantity of substrates compared to low rrn isolates. By connecting bacterial life-history strategies, genomic traits, and metabolism, this study advances our understanding of the links between bacterial community composition and the transformation of carbon in soils.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Soil Science
Simon Zech, Thomas Ritschel, Nadja Ray, Kai Uwe Totsche, Alexander Prechtel
Summary: Microaggregates, as hot spots of microbial activity, pose challenges in direct observation due to their small scale. Mathematical models combining organic matter transport mechanisms and turnover processes can help understand soil microbial dynamics at these scales. This study showed that the heterogeneous distribution of substrate and bacteria in microaggregates impacts overall biodegradation kinetics and CO2 output, with smaller microaggregate scales having a more significant impact.
Article
Plant Sciences
Anja Schmutz, Christian Schob
Summary: Diverse plant communities with different spatial water uptake patterns contribute to higher productivity in mixtures compared to monocultures. This is due to niche partitioning of species and complementary root distribution. These findings support the potential of intercropping for sustainable agriculture with more efficient soil resource utilization.
JOURNAL OF ECOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Hyun Yoon, Andrea Giometto, Martin P. Pothier, Xuhui Zhang, Alexandre J. Poulain, Matthew C. Reid
Summary: The uptake of arsenic by microbes is influenced by variations in water chemistry, particularly dissolved organic matter (DOM). This study explores the effects of different forms of DOM on arsenic uptake and reveals that thiol-containing compounds significantly inhibit the uptake of arsenite into cells. Additionally, labile DOM fractions may inhibit arsenite uptake through a catabolite repression-like mechanism. These findings suggest that DOM plays an important role in regulating arsenic uptake and biotransformation in the environment.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Geochemistry & Geophysics
Claudia Moens, Erik Smolders
Summary: Iron oxyhydroxide colloids can facilitate the transport of organic matter, oxyanions, and trace metals in the environment. This study explored how varying dissolved organic carbon to iron ratios impact the binding of phosphate, showing that decreasing NOM concentrations consistently increased the colloid size. The research found that NOM enhances the mobility of phosphate but the highest proportion of phosphate is adsorbed on the largest and least mobile particles.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Environmental Sciences
Penghui Jia, Yimei Huang, Mengli Chen, Xiping Qi, Hongyang Hou
Summary: The addition of garden waste improved the physicochemical properties of SMS-CM co-compost, advanced the thermophilic period, increased the seed germination index, and enhanced the content of humic substances and humic acid.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Limnology
Bryce G. Inman
Summary: Phytoplankton release polysaccharide-rich mucus that facilitates chemical exchanges with bacteria, but can also affect nutrient uptake. Simulation experiments show that mucus viscosity increases nutrient concentration gradient but reduces flux to the cell. While mucus can improve uptake during nutrient pulses, the reduced uptake in the presence of mucus presents a fitness cost that must be outweighed by ecological benefits.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Agronomy
Nicholas D. Warren, Erik A. Hobbie, Janet Chen, Richard G. Smith
Summary: This study investigated the ability of weed species to acquire and use different forms of nitrogen. The results showed that common agricultural weeds can access and use both organic and inorganic nitrogen, and there are differences in their uptake of inorganic nitrogen forms. These findings have important implications for understanding weed survival and weed-crop competition in agroecosystems.
Article
Engineering, Civil
Song Wei, YueHan Lu, Shuo Chen, Peng Shang, Yuan Xia, Yong Zhang
Summary: This study investigated the uptake and transport dynamics of FDOM in a forested coastal plain stream through reach-scale field experiments and stochastic modeling, revealing that the transport of FDOM is regulated more by physical retention and/or biogeochemical recycling. The tempered fractional advection-dispersion-reaction model (TFADRM) proposed in the study provided a more reasonable estimate of FDOM spiraling metrics and transport dynamics at the reach scale compared to conventionally used approaches.
JOURNAL OF HYDROLOGY
(2021)
Article
Ecology
Jessica A. Bryant, Frank O. Aylward, John M. Eppley, David M. Karl, Matthew J. Church, Edward F. DeLong
Article
Limnology
Julia M. Diaz, Karin M. Bjoerkman, Sheean T. Haley, Ellery D. Ingall, David M. Karl, Amelia F. Longo, Sonya T. Dyhrman
LIMNOLOGY AND OCEANOGRAPHY
(2016)
Article
Limnology
Yoshimi M. Rii, Solange Duhamel, Robert R. Bidigare, David M. Karl, Daniel J. Repeta, Matthew J. Church
LIMNOLOGY AND OCEANOGRAPHY
(2016)
Article
Limnology
Daniela Boettjer, John E. Dore, David M. Karl, Ricardo M. Letelier, Claire Mahaffey, Samuel T. Wilson, Jonathan Zehr, Matthew J. Church
LIMNOLOGY AND OCEANOGRAPHY
(2017)
Article
Limnology
Sara Ferron, Daniela A. del Valle, Karin M. Bjorkman, Paul D. Quay, Matthew J. Church, David M. Karl
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2016)
Article
Chemistry, Multidisciplinary
Rhea K. Foreman, Mariona Segura-Noguera, David M. Karl
Article
Microbiology
John R. Casey, Adil Mardinoglu, Jens Nielsen, David M. Karl
Article
Microbiology
John R. Casey, Sara Ferron, David M. Karl
FRONTIERS IN MICROBIOLOGY
(2017)
Article
Limnology
John R. Casey, Karin M. Bjorkman, Sara Ferron, David M. Karl
LIMNOLOGY AND OCEANOGRAPHY
(2019)
Article
Biotechnology & Applied Microbiology
Oscar A. Sosa, John R. Casey, David M. Karl
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2019)
Article
Multidisciplinary Sciences
Samuel T. Wilson, Nicholas J. Hawco, E. Virginia Armbrust, Benedetto Barone, Karin M. Bjorkman, Angela K. Boysen, Macarena Burgos, Timothy J. Burrell, John R. Casey, Edward F. DeLong, Mathilde Dugenne, Stephanie Dutkiewicz, Sonya T. Dyhrman, Sara Ferron, Michael J. Follows, Rhea K. Foreman, Carolina P. Funkey, Matthew J. Harke, Britt A. Henke, Christopher N. Hill, Annette M. Hynes, Anitra E. Ingalls, Oliver Jahn, Rachel L. Kelly, Angela N. Knapp, Ricardo M. Letelier, Francois Ribalet, Eric M. Shimabukuro, Ryan K. S. Tabata, Kendra A. Turk-Kubo, Angelicque E. White, Jonathan P. Zehr, Seth John, David M. Karl
Article
Biochemical Research Methods
John R. Casey, Michael J. Follows
PLOS COMPUTATIONAL BIOLOGY
(2020)
Article
Biochemical Research Methods
Jann Paul Mattern, Kristof Glauninger, Gregory Britten, John M. Casey, Sangwon Hyun, Zhen M. Wu, E. Virginia Armbrust, Zaid M. Harchaoui, Francois Ribalet
Summary: Estimating the growth and division rates of microbial populations is crucial for understanding carbon cycling dynamics. The use of size-structured matrix population models has become popular for this purpose, as they mechanistically describe changes in microbial cell size distributions. This study extends these models using a Bayesian approach to incorporate additional biological processes, demonstrating the importance of respiratory and exudative carbon losses in modeling population dynamics.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
John R. Casey, Rene M. Boiteau, Martin K. M. Engqvist, Zoe Finkel, Gang Li, Justin Liefer, Christian L. Muller, Nathalie Munoz, Michael J. Follows
Summary: Prochlorococcus, the most abundant marine cyanobacterium, has extensive microdiversity. We developed a modeling framework to predict variations in growth rate, metabolic configuration, and physiological state of different strains. The predicted results correlated with observed ecotype abundances, confirming their significance as a measure of fitness.
Article
Ecology
Daniel Muratore, Angela K. Boysen, Matthew J. Harke, Kevin W. Becker, John R. Casey, Sacha N. Coesel, Daniel R. Mende, Samuel T. Wilson, Frank O. Aylward, John M. Eppley, Alice Vislova, Shengyun Peng, Rogelio A. Rodriguez-Gonzalez, Stephen J. Beckett, E. Virginia Armbrust, Edward F. DeLong, David M. Karl, Angelicque E. White, Jonathan P. Zehr, Benjamin A. S. Van Mooy, Sonya T. Dyhrman, Anitra E. Ingalls, Joshua S. Weitz
Summary: By integrating time series analyses of different molecules, the authors demonstrate that microorganisms in the open ocean partition scarce resources temporally, with different microbial groups expressing nitrogen uptake and assimilation processes at different points throughout the day and night cycle. Despite competition for limited nutrients, high taxonomic diversity of microbes in the surface ocean still persists, which challenges ecological theory. The study reveals temporal niche partitioning of nitrogen assimilation processes, with different microbial groups exhibiting asynchronous transcription of genes involved in nitrogen uptake.
NATURE ECOLOGY & EVOLUTION
(2022)
Article
Chemistry, Multidisciplinary
Morgane Leon, Pieter van Beek, Virginie Sanial, Marc Souhaut, Paul Henderson, Matthew A. Charette
Summary: The analysis of radium and actinium isotopes in seawater requires the collection of large volumes of water and the use of high sensitivity instruments. To concentrate these isotopes, filters impregnated with MnO2 are typically used. However, the extraction efficiency of these filters for the target isotopes needs to be determined.