A5041256786- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Marine Biology and Ecology Research
- Marine Bivalve and Aquaculture Studies
- Bacteriophages and microbial interactions
- Advanced Fluorescence Microscopy Techniques
- Protist diversity and phylogeny
- Aquatic Invertebrate Ecology and Behavior
- Plant Molecular Biology Research
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Food composition and properties
- Parasite Biology and Host Interactions
- Microbial Metabolic Engineering and Bioproduction
- Light effects on plants
- Legume Nitrogen Fixing Symbiosis
- Aquaculture disease management and microbiota
- Methane Hydrates and Related Phenomena
- Fern and Epiphyte Biology
- Biofuel production and bioconversion
- Microbial Fuel Cells and Bioremediation
- Coastal wetland ecosystem dynamics
University of California, Santa Barbara
2025
Lawrence Berkeley National Laboratory
2022-2024
University of Vienna
2015-2017
Centre National de la Recherche Scientifique
2012-2014
Université des Antilles
2012-2014
Systématique, adaptation, évolution
2012
Cells of most bacterial species are around 2 micrometers in length, with some the largest specimens reaching 750 micrometers. Using fluorescence, x-ray, and electron microscopy conjunction genome sequencing, we characterized Candidatus (Ca.) Thiomargarita magnifica, a bacterium that has an average cell length greater than 9000 is visible to naked eye. These cells grow orders magnitude over theoretical limits for size, display unprecedented polyploidy more half million copies very large...
Abstract Ammonia-oxidizing Archaea (AOA) are ubiquitous throughout the oceanic water column; however, our knowledge on their physiological and ecological diversity in different regions is rather limited. Here, we report cultivation characterization of two novel Nitrosopumilus strains, originating from coastal surface waters Northern Adriatic Sea. The combined genomic information revealed that each strain exhibits metabolic functional traits, potentially reflecting contrasting life modes....
Zooplankton and microbes play a key role in the ocean's biological cycles by releasing consuming copious amounts of particulate dissolved organic matter. Additionally, zooplankton provide complex microhabitat rich inorganic nutrients which bacteria thrive. In this study, we assessed phylogenetic composition metabolic potential microbial communities associated with crustacean species collected North Atlantic. Using Illumina sequencing 16S rRNA gene, found significant differences between those...
Lytic phages can be potent and selective inhibitors of microbial growth have profound impacts on microbiome composition function. However, there is uncertainty about the biogeochemical conditions under which phage predation modulates ecosystem function, particularly in terrestrial systems. Ionic strength critical for infection bacteria by many phages, but quantitative data limited ion thresholds that compared with environmental concentrations. Similarly, while carbon varies environment, we...
Summary In marine invertebrates that acquire their symbionts from the environment, these are generally only taken up during early developmental stages. symbiosis between lucinid clams and intracellular sulfur‐oxidizing bacteria, it has been shown juveniles an environmental stock of free‐living symbiont forms, but is not known if adult still competent to take symbiotic bacteria environment. this study, we investigated acquisition in specimens clam Codakia orbiculata , using transmission...
Abstract Anaerobes thrive in the absence of oxygen and are an untapped reservoir biotechnological potential. Therefore, bioprospecting efforts focused on anaerobic microbial diversity could rapidly uncover new enzymes, pathways, chassis organisms to drive biotechnology innovation. Despite their potential utility, fermenters viewed as inefficient from a biochemical perspective because metabolisms produce fewer ATP (~2) per molecule glucose processed than heterotrophic respirers (~32–38 ATP)....
Epulopiscium spp. are the largest known heterotrophic bacteria; a large cigar-shaped individual is million times volume of Escherichia coli . To better understand metabolic potential and relationship sp. type B with its host Naso tonganus , we generated high-quality draft genome from population cells taken single fish. We propose name Candidatus viviparus to describe populations this best-characterized species. Metabolic reconstruction reveals more than 5% codes for carbohydrate active...
ABSTRACT Root biology is pivotal in addressing global challenges including sustainable agriculture and climate change. However, roots have been relatively understudied among plant organs, partly due to the difficulties imaging root structures their natural environment. Here we used microfabricated ecosystems (EcoFABs) establish growing environments with optical access employed nonlinear multimodal microscopy of third-harmonic generation (THG) three-photon fluorescence (3PF) achieve...
Abstract The shallow‐water bivalve Codakia orbiculata which harbors gill‐endosymbiotic sulfur‐oxidizing γ‐proteobacteria can lose and acquire its endosymbionts throughout life. Long‐term starvation recolonization experiments led to changes in the organization of cells lateral zone gill filaments. This plasticity is linked presence or absence gill‐endosymbionts. Herein, we propose that this reorganization be explained by three hypotheses: (a) a variation number bacteriocytes granule due...
Abstract Lytic phages can be potent and selective inhibitors of microbial growth have profound impacts on microbiome composition function. However, there is uncertainty about the biogeochemical conditions under which phage predation proceed modulate ecosystem function, particularly in terrestrial systems. Ionic strength known to critical for infection bacteria by many phages, but limited quantitative data ion thresholds that compared with environmental concentrations. Similarly, while carbon...
Abstract Cells of most bacterial species are around 2 µm in length, with some the largest specimens reaching 750 µm. Using fluorescence, x-ray, and electron microscopy conjunction genome sequencing, we characterized Ca. Thiomargarita magnifica, a bacterium an average cell length greater than 9,000 that is visible to naked eye. We found these cells grow orders magnitude over theoretical limits for size through unique biology, display unprecedented polyploidy more half million copies very...
Until now, the culture of sulphur-oxidizing bacterial symbionts associated with marine invertebrates remains impossible. Therefore, few studies focused on symbiont's physiology under stress conditions. In this study, we carried out a comparative experiment based two different species lucinid bivalves (Codakia orbiculata and Lucina pensylvanica) comparable factors. The were starved for 6 months in sulphide-free filtered seawater. For C. only, individuals then put back to field, natural...