Article
Microbiology
Victor Fernandez-Juarez, Xabier Lopez-Alforja, Aida Frank-Comas, Pedro Echeveste, Antoni Bennasar-Figueras, Guillem Ramis-Munar, Rosa Maria Gomila, Nona S. R. Agawin
Summary: The direct effects of microplastics (MPs) and their organic additives on marine bacteria, especially diazotrophs, vary depending on the type and concentration of MPs and additives. Different species of autotrophic and heterotrophic bacteria exhibit species-specific responses to MPs and additives, with effects ranging from beneficial to deleterious, indicating the importance of determining threshold levels for effective environmental quality control.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Environmental Sciences
Ananya Ashok, Susana Agusti
Summary: Oligotrophic areas in the oceans are important, but little is known about the sensitivity of microbial communities to pollutants in such areas. This study found that when exposed to polycyclic aromatic hydrocarbons (PAHs), some microbial populations in the oligotrophic Red Sea decreased, and chlorophyll-a levels also decreased substantially. However, certain bacteria and Synechococcus sp. showed high tolerance, indicating adaptation to chronic pollution.
Review
Fisheries
Mohamed R. Soaudy, Abdallah Ghonimy, Laura Susana Lopez Greco, Zhao Chen, Amir Dyzenchauz, Jian Li
Summary: Heterotrophic bacterial activity in biofloc systems leads to the accumulation of total suspended solids (TSS), which affects animal health and product quality. However, eliminating TSS causes a sudden change in microbial composition and nutrient concentration, promoting the growth of pathogenic bacteria. In this review, we propose novel management strategies to manipulate TSS levels by controlling heterotrophic and nitrifying bacterial activities. Hybrid activity between these bacteria can decrease bacterial intensity and carbon source supplement in biofloc systems.
Article
Ecology
Mindaugas Zilius, Aurelija Samuiloviene, Ruta Stanislauskiene, Elias Broman, Stefano Bonaglia, Rolandas Meskys, Anastasija Zaiko
Summary: This study investigated the seasonal shifts of diazotrophic communities in a freshwater coastal lagoon using nifH transcript and metagenomic sequencing approaches. The results revealed a clear seasonal succession of active nifH phylotypes, reflecting different tolerances to temperature change and nitrogen availability. Metagenomic data showed seasonal patterns in nitrogen-cycling pathways, contributing to a better understanding of pelagic N2 fixation dynamics in oligohaline estuarine ecosystems.
Article
Microbiology
Heather H. Kim, Charlotte Laufkoetter, Tomas Lovato, Scott C. Doney, Hugh W. Ducklow
Summary: By utilizing a three-dimensional coupled ocean biogeochemical model, this study investigates the responses of bacteria to climate change. It assesses the credibility of century-scale projections of bacterial carbon stock and rates in the upper 100 m layer using skill scores and measurements for the contemporary period. The results show that bacterial biomass trends are sensitive to regional trends in temperature and organic carbon stocks under different climate scenarios.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Environmental Sciences
Yelena Churakova, Anabella Aguilera, Evangelia Charalampous, Daniel J. Conley, Daniel Lundin, Jarone Pinhassi, Hanna Farnelid
Summary: It is known that diatoms, sponges, and radiolarians are the dominant organisms involved in the biological control of oceanic silica cycling. Recently, it has been discovered that smaller marine organisms, such as the picocyanobacterium Synechococcus, can also take up and accumulate silicic acid, despite not having silicon dependent cellular structures. Our study demonstrates that five strains of picoeukaryotes, including three novel isolates from the Baltic Sea and two marine species, can accumulate biogenic silica in cultures with added dissolved silica. The purpose of this silica accumulation in smaller eukaryotic organisms lacking silicon dependent structures remains unclear.
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2023)
Review
Multidisciplinary Sciences
Xuejin Feng, Ta-Hui Lin, Wei Yan, Rui Zhang, Nianzhi Jiao
Summary: Cyanobacteria, particularly Prochlorococcus, are key primary producers in the global ocean, playing a vital role in maintaining the balance of element cycling by absorbing carbon dioxide and releasing organic matter. The streamlined genomes of Prochlorococcus provide a competitive advantage in oligotrophic waters but also limit adaptability to environmental parameters. Interactions between Prochlorococcus and heterotrophic bacteria involve mutualistic and commensal relationships that contribute to the stability and diversity of marine ecosystems. Further research is needed to understand the mechanisms of these interactions and their potential impact on biogeochemical cycling in oceans, especially in the context of climate change.
CHINESE SCIENCE BULLETIN-CHINESE
(2021)
Article
Virology
Le Xie, Rui Zhang, Ya-Wei Luo
Summary: Viruses, as the most abundant microorganisms in the ocean, play important roles in marine ecosystems. However, traditional models fail to consider the dynamic changes caused by the interactions between viruses and hosts. By constructing a new model and applying it to different sites, we found that viral processes significantly impact bacterial abundance, primary production, and carbon export.
Article
Virology
Ruijie Ma, Shuai Shao, Shuzhen Wei, Junlei Ye, Yahui Yang, Nianzhi Jiao, Rui Zhang
Summary: This study identified and characterized a new phage that infects the marine bacterium Citromicrobium bathyomarinum, contributing to the understanding of phage diversity and interactions with target species. The phage has specific genetic traits and lysis characteristics, as well as auxiliary metabolic genes related to cellular processes.
Article
Engineering, Marine
Marin Ordulj, Danijela Santic, Frano Matic, Slaven Jozic, Stefanija Sestanovic, Mladen Solic, Jere Veza, Zivana Nincevic Gladan
Summary: Artificial neural network analysis was used to study the seasonal distribution of viruses and microbial food web (MFW) components in the open Adriatic Sea. The results showed that the strongest influence is found in the nonlinear relationship between viruses and temperature. Viruses were found to have a strong positive relationship with HB, the main hosts, in more than 50% of the observed data, and were associated with autotrophic picoplankton and heterotrophic nanoflagellates.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Ecology
Lauren E. Manck, Jiwoon Park, Benjamin J. Tully, Alfonso M. Poire, Randelle M. Bundy, Christopher L. Dupont, Katherine A. Barbeau
Summary: The study reveals the important role of siderophores in marine iron biogeochemical cycling and provides a deeper understanding of the mechanisms involved, showing the promoting effect of siderophores on the acquisition of iron from mineral sources and weaker iron-ligand complexes.
Article
Environmental Sciences
Alfonso Pineda, Jascieli Carla Bortolini, Luzia Cleide Rodrigues
Summary: Environmental factors and dispersal can influence the structure of biological communities, but their effects may vary among phytoplankton species from different functional groups.
Article
Environmental Sciences
Rebeca Perez-Gonzalez, Xavier Soria-Perpinya, Juan Soria, Maria D. Sendra, Eduardo Vicente
Summary: This study investigated the physical/chemical factors affecting cyanobacteria in 30 reservoirs in the Ebro River basin in northeastern Spain. The results showed that temperature, total nitrogen, total phosphorus, and water residence time were positively correlated with cyanobacteria abundance, while silica was negatively correlated. Remote sensing was used to compare cyanobacteria indicators with empirical measurements, and the results showed that factors such as light availability, nitrogen, and phosphorus were closely related to cyanobacteria abundance, while silica did not show a clear relationship.
Article
Limnology
Jiwoon Park, Bryndan P. Durham, Rebecca S. Key, Ryan D. Groussman, Zinka Bartolek, Paulina Pinedo-Gonzalez, Nicholas J. Hawco, Seth G. John, Michael C. G. Carlson, Debbie Lindell, Lauren W. Juranek, Sara Ferron, Francois Ribalet, E. Virginia Armbrust, Anitra E. Ingalls, Randelle M. Bundy
Summary: Siderophores are important iron-binding molecules that microbes use to obtain iron from their surroundings. This study investigated the concentrations and types of siderophores in different regions of the North Pacific Ocean and found higher concentrations in the iron-replete region compared to the iron-deplete region. Various types of siderophores were identified, indicating diverse production and usage of siderophores across latitude and depth. The presence of siderophore biosynthesis and uptake genes and transcripts further suggests active iron uptake by local bacterial communities.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Microbiology
Shahadat Hossain, Hidayah Manan, Zuhayra Nasrin Ahmad Shukri, Rohisyamuddin Othman, Amyra Suryatie Kamaruzzan, Ahmad Ideris Abdul Rahim, Helena Khatoon, Tashrif Mahmud Minhaz, Zahidul Islam, Nor Azman Kasan
Summary: Microplastics pollution poses a threat to aquaculture practices and human health. Limited research has been done on the effects of microplastics and potential solutions. However, some bacteria show promise in degrading microplastics particles, offering a potential treatment option.
MICROBIOLOGICAL RESEARCH
(2023)
Article
Marine & Freshwater Biology
Alexis L. Pasulka, Ty J. Samo, Michael R. Landry
JOURNAL OF PLANKTON RESEARCH
(2015)
Article
Microbiology
Kristina M. Fontanez, John M. Eppley, Ty J. Samo, David M. Karl, Edward F. DeLong
FRONTIERS IN MICROBIOLOGY
(2015)
Article
Microbiology
Ty J. Samo, Jeffrey A. Kimbrel, Daniel J. Nilson, Jennifer Pett-Ridge, Peter K. Weber, Xavier Mayali
ENVIRONMENTAL MICROBIOLOGY
(2018)
Article
Ecology
Ty J. Samo, Francesca Malfatti, Farooq Azam
AQUATIC MICROBIAL ECOLOGY
(2008)
Article
Ecology
Steven Smriga, Ty J. Samo, Francesca Malfatti, Joseph Villareal, Farooq Azam
AQUATIC MICROBIAL ECOLOGY
(2014)
Article
Geosciences, Multidisciplinary
Michael R. Stukel, Michael R. Landry, Mark D. Ohman, Ralf Goericke, Ty Samo, Claudia R. Benitez-Nelson
JOURNAL OF MARINE SYSTEMS
(2012)
Article
Marine & Freshwater Biology
Ty J. Samo, Byron E. Pedler, Gregory I. Ball, Alexis L. Pasulka, Andrew G. Taylor, Lihini I. Aluwihare, Farooq Azam, Ralf Goericke, Michael R. Landry
JOURNAL OF PLANKTON RESEARCH
(2012)
Article
Multidisciplinary Sciences
Maura Manganelli, Francesca Malfatti, Ty J. Samo, B. Greg Mitchell, Haili Wang, Farooq Azam
Article
Environmental Sciences
F. Malfatti, V. Turk, T. Tinta, P. Mozetic, M. Manganelli, T. J. Samo, J. A. Ugalde, N. Kovac, M. Stefanelli, M. Antonioli, S. Fonda-Umani, P. Del Negro, B. Cataletto, A. Hozic, N. Ivosevic DeNardis, V. Zutic, V. Svetlicic, T. Misic Radic, T. Radic, D. Fuks, F. Azam
SCIENCE OF THE TOTAL ENVIRONMENT
(2014)
Article
Biotechnology & Applied Microbiology
Jeffrey A. Kimbrel, Ty J. Samo, Christopher Ward, Daniel Nilson, Michael P. Thelen, Anthony Siccardi, Paul Zimba, Todd W. Lane, Xavier Mayali
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2019)
Article
Engineering, Environmental
Janghyuk Lee, Rachel Hestrin, Erin E. Nuccio, Keith D. Morrison, Christina E. Ramon, Ty J. Samo, Jennifer Pett-Ridge, Sonny S. Ly, Ted A. Laurence, Peter K. Weber
Summary: This study developed a label-free multiphoton nonlinear imaging approach to visualize microorganisms in soil and roots, providing contrast and chemical information. The method successfully imaged fungi and bacteria structures in the soil and roots, holding significant promise for soil science research.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Plant Sciences
Vanessa Brisson, Courtney Swink, Jeffrey Kimbrel, Xavier Mayali, Ty Samo, Suzanne M. Kosina, Michael Thelen, Trent R. Northen, Rhona K. Stuart
Summary: The roles of different ecological classes of algal exometabolites in regulating microbial community composition are not well understood. In this study, we identified exometabolites from the diatom Phaeodactylum tricornutum and investigated their potential to influence bacterial abundances. We found that secretion of selective bacterial growth substrates represents one mechanism by which algal exometabolites can modulate bacterial community composition.
Article
Multidisciplinary Sciences
Xavier Mayali, Ty J. Samo, Jeff A. Kimbrel, Megan M. Morris, Kristina Rolison, Courtney Swink, Christina Ramon, Young-Mo Kim, Nathalie Munoz-Munoz, Carrie Nicora, Sam Purvine, Mary Lipton, Rhona K. Stuart, Peter K. Weber
Summary: This study quantified carbon and nitrogen incorporation in bacterial co-cultures growing with diatom at the single-cell level. Unexpected strain and cell variability were observed, and three distinct functional guilds were identified.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Ty J. Samo, Steven Smriga, Francesca Malfatti, Byron P. Sherwood, Farooq Azam
FRONTIERS IN MARINE SCIENCE
(2014)