Article
Microbiology
Aysha Kamran, Kathrin Sauter, Andreas Reimer, Theresa Wacker, Joachim Reitner, Michael Hoppert
Summary: The study investigated the structure and composition of microbial communities in ultrabasic serpentinite springs of the Voltri Massif in Italy. Results indicate the importance of carbonate precipitation, the presence of alkaliphilic cyanobacterial communities, and the distinct adaptation of cyanobacteria to these environments compared to creek water sediment.
Article
Microbiology
Manik Prabhu Narsing Rao, Zhou-Yan Dong, Zhen-Hao Luo, Meng-Meng Li, Bing-Bing Liu, Shu-Xian Guo, Wael N. Hozzein, Min Xiao, Wen-Jun Li
Summary: The present study conducted physicochemical and microbial diversity analyses of seven Indian hot springs, and found that temperature and pH influenced microbial diversity, with bacteria being the dominant group. Both culture-dependent and culture-independent methods revealed the potential of these springs to harbor novel microbial candidates and produce thermostable enzymes.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Microbiology
Christaline George, Chloe Xue Qi Lim, Yan Tong, Stephen Brian Pointing
Summary: The Sembawang Hot Spring in Singapore is located at the foot of a geological feature called the Bentong-Raub Suture Zone. The hot spring exhibits a poly-extreme environment and supports distinct microbial communities along an environmental gradient. The high abundance of phototrophic bacteria and the presence of chemoautotrophs and heterotrophs reflect the known thermal ranges and allochthonous leaf input in the hot spring. The findings contribute to the understanding of hot spring microbiomes and address a biogeographic knowledge gap for the region.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Carla Barbosa, Javier Tamayo-Leiva, Jaime Alcorta, Oscar Salgado, Linda Daniele, Diego Morata, Beatriz Diez
Summary: This study investigates the influence of geothermal processes on thermal microbial communities on a global scale. In addition to temperature and pH, sulfate concentrations play a role in shaping the microbial communities, which depend on tectono-magmatic settings and local settings. Comparison of microbial communities from different geothermal areas shows no significant geographic distance decay, but suggests a potential ancient divergence in the same taxonomic groups.
MICROBIOLOGY SPECTRUM
(2023)
Article
Microbiology
Carla Barbosa, Javier Tamayo-Leiva, Jaime Alcorta, Oscar Salgado, Linda Daniele, Diego Morata, Beatriz Diez
Summary: Temperature, pH, and hydrochemistry of terrestrial hot springs have a critical role in shaping thermal microbial communities. However, the interactions of biotic and abiotic factors at the terrestrial-aquatic interface on a global scale are not well understood, and the influence of underground events on microbial communities remains unknown. The study found moderate correlations between pH, SO42-, and the abundance of certain microbial phyla. pH and SO42- gradients were explained by phase separation and oxidation of sulfur in the steam phase. However, a large portion of the variance in microbial community structure remains unexplained, suggesting the involvement of other environmental or biotic factors.
MICROBIOLOGY SPECTRUM
(2023)
Article
Geochemistry & Geophysics
Christos Kanellopoulos, Vasiliki Lamprinou, Artemis Politi, Panagiotis Voudouris, Ioannis Iliopoulos, Maria Kokkaliari, Leonidas Moforis, Athena Economou-Amilli
Summary: The study investigated microbial mats in a hot spring environment from Euboea Island, Greece, resulting in the formation of thermogenic travertine. Through interdisciplinary methods, the mineralogical composition of the studied samples was determined, showing that the main mineral phase is calcite and aragonite, with various trace elements present.
Article
Environmental Sciences
Chun Qing, Alan Nicol, Ping Li, Britta Planer-Friedrich, Changguo Yuan, Zhu Kou
Summary: In this study, the similarities and differences in As-S transformation processes were investigated in two Tibetan alkaline hot springs with different total As concentrations and sulfide/As ratios. Microorganisms, such as sulfur-reducing bacteria and arsenate-reducing bacteria, were found to play important roles in these processes. Sulfur-oxidizing bacteria and arsenite-oxidizing bacteria were responsible for the oxidation of As-bound S, leading to the formation of arsenite and arsenate.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Juan-Jose Escuder-Rodriguez, Maria-Eugenia Decastro, Almudena Saavedra-Bouza, Manuel Becerra, Maria-Isabel Gonzalez-Siso
Summary: The northwest of Spain has abundant non-volcanic hot springs, which have been used for thermalism activities. A diverse microbial community dominated by bacteria has been discovered in one of these hot springs using metagenomics. The study also found enzymes and microorganisms with potential biotechnological applications in this hot spring.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Vanesa Liliana Perillo, Noelia Soledad La Colla, Jeronimo Pan, Analia Veronica Serra, Sandra Elizabeth Bott, Diana Graciela Cuadrado
Summary: Microbial mats have potential as green filters to remediate polluted seawater. However, changing the natural conditions may be necessary to maximize their contact with water. Results showed that high phosphorus concentration and continuous flooding affected the dominant microbial species in the mats, and they can function both as sinks and sources for phosphorus, depending on the water conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
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
Natalia Gabriela Morales Pontet, Carolina Fernandez, Vanesa Liliana Perillo, Noelia Soledad La Colla, Analia Veronica Serra, Sandra Elizabeth Botte
Summary: This study aimed to determine the efficiency of Cr removal from seawater by microbial mats and investigate the effect of Cr on the microphytobenthic community and the influence of aeration. The results showed that microbial mats efficiently removed Cr from seawater, with removal efficiencies of 95% and 99% for different conditions. The study highlights the potential of microbial mats for Cr removal and the positive effect of aeration on the removal efficiency.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Microbiology
Tanmoy Debnath, Sushanta Deb, Subrata K. Das
Summary: This study described the microbial community composition and function in tropical hot springs and their relationship with environmental variables. The metagenomic analysis revealed differences in dominant phyla among hot springs with different temperatures, and identified genes related to various metabolic pathways.
CURRENT MICROBIOLOGY
(2023)
Article
Ecology
Ivan J. Moreno, Bianca Brahamsha, Mohamed S. Donia, Brian Palenik
Summary: The microbial mat communities in the hot springs of the Black Canyon of the Colorado River were studied using both culture-independent and -dependent methods. The results showed that these communities are mainly composed of cyanobacterial taxa, along with a diverse community of protists and other eukaryotes. The use of full-length rRNA gene sequencing allowed for a higher resolution of the community, and correlation analysis supported the co-occurrence of cyanobacteria, chloroflexi, and bacteroidetes.
Article
Environmental Sciences
Qing He, Shang Wang, Weiguo Hou, Kai Feng, Fangru Li, Wanming Hai, Yidi Zhang, Yuxuan Sun, Ye Deng
Summary: The study found that microbial community assembly in geothermal ecosystems is influenced by stochasticity and biotic interactions, with differences between sediment and water communities in terms of diversity, species-interactions, and community assembly. Sediment communities are primarily governed by heterogeneous selection, while water communities are mainly influenced by undominated stochastic processes and dispersal limitation. Temperature and ferrous iron play a key role in mediating the balance of stochastic and deterministic assembly processes in sediment communities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Genetics & Heredity
Fangru Li, Weiguo Hou, Shang Wang, Yidi Zhang, Qing He, Wenhui Zhang, Hailiang Dong
Summary: In this study, the impact of different mineral particles on the diversity and structure of microbial communities in hot springs was investigated. Results showed that the microbial composition on mineral surfaces differed from that in the bulk sediment samples, and certain minerals enriched specific microbial communities and functional groups. The findings provide novel insights into the mechanisms of community assembly and element cycling in terrestrial hydrothermal systems associated with hot springs.
ENVIRONMENTAL MICROBIOME
(2023)
Article
Environmental Sciences
Eleonora Puccinelli, Christopher D. McQuaid, Sergey Dobretsov, Ronaldo A. Christofoletti
MARINE ENVIRONMENTAL RESEARCH
(2019)
Article
Environmental Sciences
Sergey Dobretsov, Priyanka Sathe, Tanujjal Bora, Michael Barry, Myo Tay Zar Myint, Mohammed Al Abri
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2020)
Article
Biochemistry & Molecular Biology
Eva Cacabelos, Patricio Ramalhosa, Joao Canning-Clode, Jesus S. Troncoso, Celia Olabarria, Cristina Delgado, Sergey Dobretsov, Ignacio Gestoso
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Plant Sciences
Mahtab Azari, Yas Farjad, Ali Nasrolahi, Mario De Stefano, Maryam Ehsanpour, Sergey Dobrestov, Roksana Majewska
Article
Plant Sciences
Sergey Dobretsov, Karina Veliz, Maria Soledad Romero, Fadia Tala, Martin Thiel
Summary: UV radiation affects seaweeds and their associated microorganisms, changing the composition of microbial communities on the thalli and reducing community diversity. The relative abundance of certain bacterial species increased while others decreased during UV exposure, highlighting the important ecological role of microbial communities in seaweed-microbial interactions. Future research should further explore the ecological functions of microbial communities associated with seaweeds.
EUROPEAN JOURNAL OF PHYCOLOGY
(2021)
Article
Chemistry, Physical
Emile Salomon Massima Mouele, Mihaela Dinu, Anca Constantina Parau, Alina Vladescu, Myo Tay Zar Myint, Htet Htet Kyaw, Jamal Al-Sabahi, Mohammed Al-Abri, Sergey Dobretsov, Mohammed A. Al Belushi, Rahma Al-Mamari, Mariana Braic, Leslie Felicia Petrik
Article
Microbiology
Maria Papadatou, Samuel C. Robson, Sergey Dobretsov, Joy E. M. Watts, Jennifer Longyear, Maria Salta
Summary: This study aimed to explore the effects of coating types on microbial biofilm community profiles and found differences in community structures between biocidal and biocidal-free coatings. The results showed that biocidal coatings supported communities dominated by Alphaproteobacteria and Bacteroidetes, while other taxa proliferated on fouling-release surfaces.
Article
Biodiversity Conservation
Daniel Menezes-Blackburn, Nahad Al-Mahrouqi, Buthaina Al-Siyabi, Adhari Al-Kalbani, Ralf Greiner, Sergey Dobretsov
Summary: The study identified abundant bacteria in aquaponics systems that carry enzymes responsible for plant-nutrient mineralization, with some also carrying genes for fiber-degrading enzymes and phytases.
Article
Chemistry, Analytical
Sergey A. Piontkovski, Alexandr Melnik, Irina M. Serikova, Vladislav P. Evstigneev, Sergey Dobretsov
Summary: This study reveals the significant variation of bioluminescent potential in the upper mixed layer of the western Indian Ocean during the winter monsoon season. The maximal potential is associated with cyclonic eddy, and the fine-scale measurements show higher spatial heterogeneity. The trend of bioluminescent potential variance is similar to the zooplankton biomass.
Article
Biochemistry & Molecular Biology
Mohammed Al-Abri, Htet Htet Kyaw, Buthayna Al-Ghafri, Myo Tay Zar Myint, Sergey Dobretsov
Summary: This study conducted an autopsy analysis of reverse osmosis membranes, revealing the presence of significant amounts of inorganic and organic foulants on the membrane surface and sub-surface, including hydrocarbons, carboxylic acids/esters, and carbohydrates/polysaccharides. The study also identified the presence of Bacillus cereus and Bacillus marisflavi.
Article
Biotechnology & Applied Microbiology
Javad Loghmannia, Ali Nasrolahi, Sergey Dobretsov
Summary: In this study, the epibiotic bacteria on sea turtles in the Persian Gulf were investigated. The highest and lowest bacterial densities were found on green and hawksbill sea turtles, respectively. The dominant class of bacteria on all substrates was Gamma- and Alpha-proteobacteria.
Editorial Material
Biochemistry & Molecular Biology
Sergey Dobretsov, Daniel Rittschof
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biochemistry & Molecular Biology
Sergey Dobretsov, Daniel Rittschof
Summary: Biofouling is the growth of organisms on wet surfaces, including micro- and macrofouling. While it is a major problem for industries, the settlement and growth of some biofouling species can be desirable. Modern omic techniques provide unique opportunities to study biofouling organisms and communities and investigate their metabolites and environmental interactions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Marine & Freshwater Biology
Rafaela dos Santos Costa, Daniela Batista, William Romao Batista, Maria Helena Baeta Neves, Claudio Cerqueira Lopes, Rosangela Sabattini Capella Lopes, Esther Faria Braga, Thiana Santiago Nascimento, Sergey Dobretsov, Ricardo Coutinho
Summary: This study tested the effect of a synthetic natural compound on the larvae of invasive orange cup coral and found that it has the potential to be used for the control of this coral species.
OCEAN AND COASTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Xiao-Meng Hu, Junbo Zhang, Wen-Yang Ding, Xiao Liang, Rong Wan, Sergey Dobretsov, Jin-Long Yang
Summary: The inactivation of the tesA gene in Pseudoalteromonas marina increased the c-di-GMP content, reduced fatty acid content, weakened motility, and enhanced biofilm formation, resulting in a significant decrease in mussel larval metamorphosis rate. Addition of extracted fatty acids from P. marina to the Delta tesA biofilms promoted biofilm-inducing capacity, indicating a regulation of bacterial biofilm composition by tesA gene.
