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Heidi Aronson, PhD

@heidi-aronson.bsky.social
856 followers 868 following 18 posts

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

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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 29/09/2026
Heterotrophic inorganic carbon fixation varies with temperature and resource availability in marine and soil bacterial isolates journals.asm.org/doi/10.1128/... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 05/10/2026
Ocean acidification reshapes phytoplankton phosphorus metabolism under phosphate-limited conditions www.nature.com/articles/s41... #jcampubs 🌊
nature.com
Ocean acidification reshapes phytoplankton phosphorus metabolism under phosphate-limited conditions - Nature Geoscience
Ocean acidification can reduce phytoplankton phosphorus content, especially under phosphate limitation, which could reshape marine nutrient balance and phosphorus cycling, according to long-term exper...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 09/10/2026
Fe(III) oxide respiration by a Desulfovibrio species lacking canonical outer-membrane electron transfer systems journals.asm.org/doi/10.1128/... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 28/09/2026
Arsenate reduction coupled to anaerobic oxidation of methane by members of the Methanoperedenaceae academic.oup.com/ismej/advanc... #jcampubs
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Reposted by Heidi Aronson, PhD
Simonetta Gribaldo @sgribaldo.bsky.social · 23/09/2026
Interested in #archaea, #methane, #cell-envelopes? New paper out @nature.com ! We discovered an enzyme that specifically cleaves the cell wall of methanogens, revealing a new chemical structure of archaeal peptidoglycan, 50 yrs after its first description www.nature.com/articles/s41... #MicroSky 🧵👇
nature.com
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Reposted by Heidi Aronson, PhD
Javier del Campo @fonamental.bsky.social · 23/09/2026
A genomic catalog of Earth’s bacterial and archaeal symbionts #symbiosis www.nature.com/articles/s41...
nature.com
A genomic catalog of Earth’s bacterial and archaeal symbionts - Nature Biotechnology
Symbiotic relationships of microorganisms are predicted and cataloged with a machine learning tool.
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Reposted by Heidi Aronson, PhD
Karen Lloyd @karenlloyd.bsky.social · 16/09/2026
I wrote a blog post about aeornophiles for Small Things Considered. smallthingsconsidered.blog/schaechter/2...
smallthingsconsidered.blog
Aeonophiles
by Karen G. Lloyd — The story behind some extremely long-lived microbial cells.
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Reposted by Heidi Aronson, PhD
Brett Baker @archaeal.bsky.social · 16/09/2026
www.nature.com/articles/d41...
nature.com
These bizarre, much-coveted microbes are revealing the origins of complex life
Researchers are racing to culture a menagerie of exotic organisms and finding lots of surprises along the way.
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Reposted by Heidi Aronson, PhD
Allan Konopka @hamatsa50.bsky.social · 15/09/2026
The latest from Think Like a Microbe thinkmicrobe.substack.com/p/jumping-to... What should be the standard of evidence for a claim? Here, 'metabolic cooperation' between auxotrophs and prototrophs 🧪🧫 #philsci
thinkmicrobe.substack.com
Jumping to conclusions
I follow Cameron Thrash on social media as he regularly posts links to interesting microbial ecology papers.
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Reposted by Heidi Aronson, PhD
Evgenii Protasov @evgenii-protasov.bsky.social · 15/09/2026
Expanding the substrate range of methanogenesis: thermophilic methanogenic Archaeoglobi produce methane from long-chain fatty acids 🤓🧫🔥 #methanogens #methane #archaea #MicroSky #ArchaeaSky @natmicrobiol.nature.com www.nature.com/articles/s41...
nature.com
Evidence of direct methane production from long-chain fatty acids by thermophilic Archaeoglobi - Nature Microbiology
An enrichment culture from hot spring sediments in China suggests that Ca. M. sphaerolipidus uses a suite of metabolic pathways to convert long-chain fatty acids such as oleic acid to methane, a proce...
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Reposted by Heidi Aronson, PhD
Nature Microbiology @natmicrobiol.nature.com · 15/09/2026
Out Now! Evidence of direct methane production from long-chain fatty acids by thermophilic Archaeoglobi #MicroSky
go.nature.com
Evidence of direct methane production from long-chain fatty acids by thermophilic Archaeoglobi
Nature Microbiology, Published online: 15 September 2026; doi:10.1038/s41564-026-02490-5An enrichment culture from hot spring sediments in China suggests that Ca. M. sphaerolipidus uses a suite of metabolic pathways to convert long-chain fatty acids such as oleic acid to methane, a process they term liparotrophy.
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Reposted by Heidi Aronson, PhD
bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 12/09/2026
Coupling Stickland fermentation with reverse β-oxidation represents a new mode of medium-chain carboxylate production www.biorxiv.org/content/10.64898/20…
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 11/09/2026
Deep shifts in Evolutionary Rate Trajectories of Ancient Bacterial Genes www.biorxiv.org/content/10.6... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 04/09/2026
A global genomic survey of prokaryotic carbon fixation reveals an oxygen-tolerant rTCA cycle in the surface ocean www.biorxiv.org/content/10.6... #jcampubs 🌊
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 08/09/2026
Metabolic switching between inorganic and organic phosphorus sustains microbial activity in an ultraoligotrophic ocean www.nature.com/articles/s41... #jcampubs 🌊
nature.com
Metabolic switching between inorganic and organic phosphorus sustains microbial activity in an ultraoligotrophic ocean - Scientific Reports
Scientific Reports - Metabolic switching between inorganic and organic phosphorus sustains microbial activity in an ultraoligotrophic ocean
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Reposted by Heidi Aronson, PhD
c0nc0rdance @c0nc0rdance.bsky.social · 31/07/2025
Take a minute to really absorb the scale of what you're seeing. This is 'Cueva de los Cristales', the Cave of the Crystals, near the city of Naica in the Mexican state of Chihuahua. The crystals are selenite, a type of gypsum. They formed over the last 1 million years. (📷: Javier Trueba, MSF)
A man stands in a cave filled with white crystals, many of them much taller and larger than he is.  The scale is hard to even understand.

CREDIT:  Javier Trueba

From the C&EN article I'm citing below:
"For millennia, conditions within the Cave of Crystals (290 m underground) were perfect for the growth of gypsum crystals, allowing them to grow to their massive size.  Credit: Javier Trueba/MSF/Science Source"
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Reposted by Heidi Aronson, PhD
Mara Reed @geyserite.bsky.social · 10/09/2026
Our education program manager and I cooked this up. Vote #gypsum if you like caves. ⚒️ #MinCup26
Graphic including photo on the left showing two cavers peeking out from behind a gypsum cave wall. Cation reads: don’t hide behind harder minerals. Vote gypsum! Righthand side of graphic reads: Mineral Cup 2026, round 1 match 10, voting ends at 6pm MDT September 10, 2026. Also shown is the logo of the National Cave and Karst Research Institute.
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 31/08/2026
Rethinking the origin of life at seafloor hydrothermal vents www.pnas.org/doi/10.1073/... #jcampubs
pnas.org
Rethinking the origin of life at seafloor hydrothermal vents | PNAS
Alkaline vents have dominated a class of hypotheses for the origins of life since their discovery a quarter of century ago, but advances in underst...
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Reposted by Heidi Aronson, PhD
Taylor priest @taylorpriest.bsky.social · 25/08/2026
🚨Interested in methane cycling or carbon flow in sediments? In our new paper, we establish a link between... polysaccharide degradation 🔗fermentation🔗methanogenesis🔗methane oxidation... In anoxic lake sediments academic.oup.com/ismecommun/a... Congrats to @bledinadede.bsky.social for leading this
academic.oup.com
Active microbial communities and their extrachromosomal elements link organic matter degradation to methane cycling in anoxic sediments
Abstract. Anaerobic carbon transformation in freshwater sediments drives substantial methane emissions globally, yet the microbial taxa linking complex car
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 27/08/2026
Multiheme selenoenzyme essential for elemental sulfur respiration www.science.org/doi/full/10.... #jcampubs
science.org
Multiheme selenoenzyme essential for elemental sulfur respiration
Elemental sulfur reduction is a key process in anaerobic ecosystems and the global sulfur cycle. Although elemental sulfur serves as a terminal electron acceptor in microbial respiration, the molecula...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 27/08/2026
Shiny metal catalysts at the origin of metabolism www.cell.com/trends/micro... #jcampubs
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Reposted by Heidi Aronson, PhD
Karthik Anantharaman @karthik-a.bsky.social · 17/08/2026
Our latest review paper on deep sea viruses is now live in @annualreviews.bsky.social! This comprehensive review brings together why viruses are essential players not just in ecology, but in evolution and planetary-scale biogeochemistry. www.annualreviews.org/content/jour...
annualreviews.org
Decoding the Deep: The Ecology, Biogeography, and Evolution of Deep-Sea Viruses
Viruses dominate the deep-ocean biosphere (>200-m depth) yet remain profoundly understudied. As the most abundant biological entities on Earth, they govern the geochemistry, evolution, and ecology ...
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Reposted by Heidi Aronson, PhD
Seth Finnegan @sethf.bsky.social · 11/08/2026
My home department (Integrative Biology, UC Berkeley) is searching for an assistant professor in ecology—please distribute widely! aprecruit.berkeley.edu/JPF05489
aprecruit.berkeley.edu
Assistant Professor –Ecology- Integrative Biology
University of California, Berkeley is hiring. Apply now!
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 06/08/2026
Metagenomics deciphers diagenetic processes of ferruginous mineralization in the deep biosphere www.nature.com/articles/s43... #jcampubs
nature.com
Metagenomics deciphers diagenetic processes of ferruginous mineralization in the deep biosphere - Communications Earth & Environment
Authigenic minerals reflect specific respiration and fermentation pathways leading to diagenetic redistribution of iron and carbon isotopes during burial, according to an in-depth characterization of ...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 06/08/2026
The evolution of the Earth’s surface iron cycle www.pnas.org/doi/10.1073/... #jcampubs 🌊
pnas.org
The evolution of the Earth’s surface iron cycle | PNAS
Formation and burial of pyrite (iron sulfide) in marine sediments exert a fundamental control on atmospheric oxygenation and seawater buffering ove...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 20/07/2026
Evolutionary trajectory of microbial sulfur oxidation pathways recapitulates Earth’s oxygenation history www.nature.com/articles/s41... #jcampubs 🌊
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 13/07/2026
Microbial N2O Reduction in Sulfidic Waters: Implications for Proterozoic Oceans onlinelibrary.wiley.com/doi/10.1111/... #jcampubs 🌊
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 13/07/2026
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 🌊
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 30/06/2026
Methanotrophy under extreme alkalinity in a serpentinizing system www.nature.com/articles/s41... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 02/07/2026
Enrichments along gradients resolve eco-evolutionary forces on subsurface microbiomes www.biorxiv.org/content/10.6... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 29/06/2026
Dissimilatory iodate-reducing microorganisms inhabit marine oxygen minimum zones academic.oup.com/nsr/advance-... #jcampubs 🌊
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Reposted by Heidi Aronson, PhD
James Bradley @drbradbrad.bsky.social · 17/06/2026
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/...
journals.plos.org
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-...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 02/06/2026
Polyphosphate affects the growth and methanogenesis of deep-sea methanogenic archaea www.pnas.org/doi/10.1073/... #jcampubs 🌊
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 12/06/2026
Gene ancestries reveal diverse microbial associations during eukaryogenesis www.nature.com/articles/s41... #jcampubs
nature.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 15/06/2026
Major contribution of anaplerosis to inorganic carbon fixation in the dark ocean www.nature.com/articles/s41... #jcampubs 🌊
nature.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 15/06/2026
Desulfatiglans-related bacteria associated with conductive mineral particles in marine subsurface sediments journals.asm.org/doi/10.1128/... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 16/06/2026
Deep-sea anaerobic microbial communities couple degradation of insoluble chitin to extracellular electron transfer academic.oup.com/ismej/advanc... #jcampubs
academic.oup.com
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
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Reposted by Heidi Aronson, PhD
Jordon Hemingway @jordonhemingway.bsky.social · 16/06/2026
🚨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...
nature.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 22/05/2026
Physiological trade-offs drive the archaeal dominance and carbon turnover in deep subsurface www.biorxiv.org/content/10.6... #jcampubs
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Heidi Aronson, PhD @heidi-aronson.bsky.social · 21/05/2026
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....
agupubs.onlinelibrary.wiley.com
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...
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Reposted by Heidi Aronson, PhD
Leigh Anne Riedman @fossils.bsky.social · 20/05/2026
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
rdcu.be
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,...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 20/05/2026
Zero-valent sulfur is the product of assimilatory sulfite reductase and a substrate of cysteine synthase journals.asm.org/doi/10.1128/... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 20/05/2026
Extracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration www.nature.com/articles/s41... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 05/05/2026
Biological use of molybdenum and tungsten stems back to 3.4 billion years ago www.nature.com/articles/s41... #jcampubs
nature.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 23/04/2026
Our first collaboration with the Levine lab! Defining metabolic niches for marine microbial heterotrophs www.science.org/doi/full/10.... #jcampubs 🌊
science.org
Defining metabolic niches for marine microbial heterotrophs
Understanding carbon cycling requires simplifying bacterial diversity into functional groups defined by genetic signatures.
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 12/04/2026
Breathing both ways: simultaneous aerobic–anaerobic respiration in microbes www.cell.com/trends/micro... #jcampubs
cell.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 17/04/2026
Artificial sediments enable reproducible cultivation and recapitulate ecological interactions of cable bacteria www.biorxiv.org/content/10.6... #jcampubs
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 21/04/2026
Microbial Primer: Bacterial energy metabolism www.microbiologyresearch.org/content/jour... #jcampubs
microbiologyresearch.org
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 01/04/2026
A Novel Slowly Evolving Lineage of the Desulforudis Clade From the Deep Subsurface enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/... #jcampubs
enviromicro-journals.onlinelibrary.wiley.com
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...
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Reposted by Heidi Aronson, PhD
Cameron Thrash @jcamthrash.bsky.social · 23/03/2026
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
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