Evolutionary trajectory of microbial sulfur oxidation pathways recapitulates Earth’s oxygenation history www.nature.com/articles/s41... #jcampubs 🌊
Heidi Aronson, PhD
@heidi-aronson.bsky.social
Postdoc in the Coates Lab @UCBerkeley, PhD from the Amend lab @USC and the Macalady lab @PSU | #Geomicrobiology | #Astrobiology | #Sulfur | #Phosphorus | #Extremophiles | Microbial metabolism | Cultivation
Microbial N2O Reduction in Sulfidic Waters: Implications for Proterozoic Oceans onlinelibrary.wiley.com/doi/10.1111/... #jcampubs 🌊
Hydrostatic pressure drives metabolic strategies for anaerobic hydrocarbon degradation in cold seep sediments: from autonomy to syntrophic cooperation revealed by metagenomics www.sciencedirect.com/science/arti... #jcampubs 🌊
Methanotrophy under extreme alkalinity in a serpentinizing system www.nature.com/articles/s41... #jcampubs
Enrichments along gradients resolve eco-evolutionary forces on subsurface microbiomes www.biorxiv.org/content/10.6... #jcampubs
Dissimilatory iodate-reducing microorganisms inhabit marine oxygen minimum zones academic.oup.com/nsr/advance-... #jcampubs 🌊
What happens to labile carbon when it reaches the Arctic seafloor? In our new paper led by Juan Carlos Trejos-Espeleta, we show how marine fungi efficiently assimilate DOC & promote C retention in Arctic fjord sediments Nice 🧵 from @ggomezsaez.bsky.social 👇 journals.plos.org/plosbiology/...
Fungi enhance microbial carbon retention in high Arctic fjord sediment
Fungi act as critical biological carbon storage reservoirs in soil ecosystems, but what about marine sediments? This study shows that marine fungi promote carbon storage in arctic fjord sediment, hot-...
journals.plos.org
Gonzalo Gomez Saez@ggomezsaez.bsky.social · 2mo agoArctic fjords are hotspots for carbon sequestration affected by global warming. In our last article, published in #PLoSBiology, we show that fungi living in Svalbard sediments efficiently assimilate labile DOM and retain it as microbial biomass, rather than allowing it to be rapidly respired.
Polyphosphate affects the growth and methanogenesis of deep-sea methanogenic archaea www.pnas.org/doi/10.1073/... #jcampubs 🌊
Gene ancestries reveal diverse microbial associations during eukaryogenesis www.nature.com/articles/s41... #jcampubs
Gene ancestries reveal diverse microbial associations during eukaryogenesis - Nature
Phylogenomic reconstruction of the proteome of the last eukaryotic common ancestor sheds light on the origin of eukaryotes, indicating an important role of horizontal transfer of genes from diverse ba...
nature.com
Major contribution of anaplerosis to inorganic carbon fixation in the dark ocean www.nature.com/articles/s41... #jcampubs 🌊
Major contribution of anaplerosis to inorganic carbon fixation in the dark ocean - Nature Geoscience
While most newly formed organic carbon in the dark ocean is derived from chemolithoautotrophic microorganisms, 17% also comes from an alternative pathway called anaplerosis that is related to the tric...
nature.com
Desulfatiglans-related bacteria associated with conductive mineral particles in marine subsurface sediments journals.asm.org/doi/10.1128/... #jcampubs
Deep-sea anaerobic microbial communities couple degradation of insoluble chitin to extracellular electron transfer academic.oup.com/ismej/advanc... #jcampubs
Deep-sea anaerobic microbial communities couple degradation of insoluble chitin to extracellular electron transfer
Abstract. Chitin, a major structural component of arthropod exoskeletons, is an abundant carbon and nitrogen source in marine ecosystems. While its degrada
academic.oup.com
🚨paper alert!🚨 Thrilled to share our work, led by @climategordon.bsky.social, on terrestrial OC burial during the PETM, which was likely much higher then previously thought. Implications for C-cycle responses to hothouse climates! @natgeosci.nature.com www.nature.com/articles/s41...
Enhanced marine burial of terrestrial organic carbon through the Palaeocene–Eocene Thermal Maximum - Nature Geoscience
The burial of terrestrially derived organic carbon in coastal marine sediments greatly increased during the Palaeocene–Eocene Thermal Maximum, probably helping to draw down a large portion of carbon r...
nature.com
Physiological trade-offs drive the archaeal dominance and carbon turnover in deep subsurface www.biorxiv.org/content/10.6... #jcampubs
Published! Using thermodynamics, we proposed a new microbial metabolism: CH4 + CO to form acetate. This reaction is exergonic under a wide range of conditions and could potentially fuel life in serpentinizing systems and the deep subsurface. agupubs.onlinelibrary.wiley.com/doi/full/10....
Acetogenic Methane‐Carbon Monoxide Comproportionation: An Exergonic but Unobserved Microbial Metabolism
Carbon comproportionation reactions are an underexplored class of carbon redox processes relevant to microbial energy conservation Methane-carbon monoxide comproportionation to acetate is exergon...
agupubs.onlinelibrary.wiley.com
Heidi Aronson, PhD@heidi-aronson.bsky.social · 7mo agoWe’re back with a new comproportionation metabolism! Here we propose that the reaction of CH4 and CO to form acetate is exergonic could support microbial life in serpentinizing springs, the deep subsurface, and Mars and early Earth hydrothermal fluids. #geomicrobiology #astrobiology #methane 🪐🦠
Excited to say that my new paper with @maxlechte.bsky.social (and others not on bluesky) has come out in @nature.com! Study of sediments, geochemistry and fossils from rocks 1.75 to 1.4 billion years old indicate that the oldest known #eukaryotes were aerobic and benthic! #protists rdcu.be/fjNgL
Early fossil eukaryotes were benthic aerobes
Nature - Integrated palaeontological, sedimentological and geochemical analyses of ancient rocks from Australia show that early eukaryotes were largely restricted to oxygenated benthic habitats,...
rdcu.be
Zero-valent sulfur is the product of assimilatory sulfite reductase and a substrate of cysteine synthase journals.asm.org/doi/10.1128/... #jcampubs
Extracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration www.nature.com/articles/s41... #jcampubs
Biological use of molybdenum and tungsten stems back to 3.4 billion years ago www.nature.com/articles/s41... #jcampubs
Biological use of molybdenum and tungsten stems back to 3.4 billion years ago - Nature Communications
The study shows that life began using molybdenum and tungsten enzymes as early as 3.7–3.1 billion years ago. Study reveals that key metabolic processes arose despite scarce metals and highlighting the...
nature.com
Our first collaboration with the Levine lab! Defining metabolic niches for marine microbial heterotrophs www.science.org/doi/full/10.... #jcampubs 🌊
Defining metabolic niches for marine microbial heterotrophs
Understanding carbon cycling requires simplifying bacterial diversity into functional groups defined by genetic signatures.
science.org
Breathing both ways: simultaneous aerobic–anaerobic respiration in microbes www.cell.com/trends/micro... #jcampubs
Breathing both ways: simultaneous aerobic–anaerobic respiration in microbes
Microorganisms have historically been classified as obligate aerobes or anaerobes, facultative anaerobes, or microaerophiles, reflecting differences in respiratory strategies dictated by the use of ox...
cell.com
Artificial sediments enable reproducible cultivation and recapitulate ecological interactions of cable bacteria www.biorxiv.org/content/10.6... #jcampubs
Microbial Primer: Bacterial energy metabolism www.microbiologyresearch.org/content/jour... #jcampubs
Microbial Primer: Bacterial energy metabolism
All cells need energy to perform their functions. This primer introduces energy metabolism in bacteria, with a focus on key pathways and examples from model organisms, while acknowledging that bacteri...
microbiologyresearch.org
A Novel Slowly Evolving Lineage of the Desulforudis Clade From the Deep Subsurface enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/... #jcampubs
A Novel Slowly Evolving Lineage of the Desulforudis Clade From the Deep Subsurface
A novel slowly evolving lineage of the Desulforudis-clade, Desulfosceptrum tomskiensis sp. nov. gen. nov., has been isolated in pure culture and described. Desulforudis audaxviator itself, a paradigm...
enviromicro-journals.onlinelibrary.wiley.com
Redox distribution of Asgard archaea and co-occurring taxa in microbial mats from an early Proterozoic ecosystem analog www.biorxiv.org/content/10.6... #jcampubs
Pushing the upper temperature limit of methanotrophy in continental hydrothermal ecosystems, active biological methane oxidation in hot springs of Yellowstone National Park www.frontiersin.org/journals/mic... #jcampubs
Microbial phosphorus cycling in terrestrial ecosystems www.nature.com/articles/s41... #jcampubs
Microbial phosphorus cycling in terrestrial ecosystems - Nature Reviews Microbiology
In this Review, the authors describe current knowledge of microbial phosphorus cycling in terrestrial ecosystems and discuss how microbial communities respond to environmental and anthropogenic pressu...
nature.com
Carbon, nitrogen, and sulfur cycling unveil deep-sea microbial niches in the Atacama Trench www.nature.com/articles/s41... #jcampubs 🌊
Carbon, nitrogen, and sulfur cycling unveil deep-sea microbial niches in the Atacama Trench - Nature Communications
Deep sea sediment microbes recycle key elements such as nitrogen, carbon, and sulphur. Gene activity from Chilean sediments shows communities are fuelled by sinking organic matter and by a sulphur ric...
nature.com
Carbon monoxide-driven proton respiration enables facultative anaerobes to survive electron acceptor limitation academic.oup.com/ismej/advanc... #jcampubs
Promethearchaeota Persistence in Marine Sediments Frozen for Over 100 kyr enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/... #jcampubs
enviromicro-journals.onlinelibrary.wiley.com