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Posts by Ian Marshall

Pleased to share our preprint on a cultivation system for cable bacteria using artificial sediments, removing the variability of natural samples. The system supports growth, serial transfer, and recapitulates key geochemical gradients and microbial interactions.

www.biorxiv.org/content/10.6...

4 days ago 1 2 1 0

Multiple fully funded PhD/postdoc positions available: experimental evolution of tumour suppression, egalitarian & fraternal ETIs, jumbo phage ecology & genetics. Related EoIs welcome.

Email CV/statement of motivation written in own words. Open until filled.

Grateful for reposting 🙏

1 week ago 7 20 1 0
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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 i…

Excited to share our paper in @cp-trendsmicrobiol.bsky.social
We explore how microbes can simultaneously use oxygen and alternative electron acceptors, reshaping how we think about respiration. We also discuss the evolutionary context and how it can be studied.
www.sciencedirect.com/science/arti...

1 week ago 18 7 1 0
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Retreat day 1🌿
Yesterday, CEM arrived at MolsLab in beautiful sunshine, kicking off our annual 3-day retreat dedicated to deep dives into CEM’s key research areas.
We spent the day in focused scientific group work across our core topics, bringing together diverse skills, backgrounds and disciplines

1 week ago 4 1 0 0

Deadline is April 20th! Let’s get those viruses

1 week ago 11 15 0 0
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PhD positions in hadal biogeochemistry & microbial ecology Application deadline: 4 May 2026 at 23:59 hours local Danish time

📣We have 5 PhD positions in hadal biogeochemistry and microbial ecology at the Danish Center for Hadal Research: lnkd.in/eJ6rp_Rk. 📣

Deadline: 4 May 2026

Please share widely!

fa-eosd-saasfaprod1.fa.ocs.oraclecloud.com/hcmUI/Candid...

2 weeks ago 8 19 0 0
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Glad to see our paper published in Nature Communications
We discovered how novel marine microorganisms interact via geoconductors to produce methane. www.nature.com/articles/s41...

4 weeks ago 17 5 2 0
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Climate change: when the ocean runs out of oxygen Oxygen levels are low in many ocean regions. How does this affect organic matter cycling and microorganisms? In search of an answer, biogeochemist Gonzalo Gomez Saez journeyed by ship to Jutland.

The world’s oceans are losing oxygen—one of the most serious consequences of climate change. 🌊 But what impact does this have on microorganisms and organic matter cycles?🚢
To find out, biogeochemist @ggomezsaez.bsky.social and his team are traveling to Jutland:

1 month ago 5 2 0 0
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Please help spread the word about this 3-year postdoc position in my team.

If your expertise & interest lie in studying how organisms from different domains of life (Bacteria and Archaea) communicate, come join us this summer in cozy Odense, Denmark.

Job post: www.nature.com/naturecareer...

1 month ago 20 23 1 0
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Open position as an Associate Senior Lecturer/Assistant Professor in Molecular Microbiology at the Department of Biology, Lund University.

Apply before 28 April 2026. More info & application at lu.varbi.com/en/what:job/... Please share.

1 month ago 2 4 0 1
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Climate change: when the ocean runs out of oxygen Oxygen levels are low in many ocean regions. How does this affect organic matter cycling and microorganisms? In search of an answer, biogeochemist Gonzalo Gomez Saez journeyed by ship to Jutland.

Read about our cruise last year to Mariager Fjord with @ggomezsaez.bsky.social at www.lmu.de/en/newsroom/...

1 month ago 3 3 0 0
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Lithosyntrophy: Obligate syntrophy in a phosphite-oxidizing, methanogenic culture | PNAS The anaerobic conversion of organic matter to methane and carbon dioxide typically relies on obligate syntrophic interactions between bacteria and ...

How do you make methane from phosphite? Through interspecies H2 transfer! Our paper on lithosyntrophy is finally published - read about how we resolved the metabolic interactions in this phosphite oxidizing, methanogenic enrichment culture! #phosphorus #methanogenesis www.pnas.org/doi/10.1073/...

1 month ago 18 9 2 1
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#FEMSmicroBlog: Exploring the metabolic activities of microbial methane munchers #FEMSmicroBlog: So-called “microbial methane munchers” have the unique abilities to lower methane emissions from various ecosystems.

Methane is the second most abundant greenhouse gas with a high heat-trapping capacity but a short lifespan in the atmosphere.

So-called “microbial methane munchers” can lower methane emissions from diverse ecosystems, as explored on the new #FEMSmicroBlog. #FascinatingMicrobes

1 month ago 6 3 0 1
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Postdoc in Soil viral ecology - Vacancy at Aarhus University Vacancy at Department of Agroecology - Plant Pathology and Microbiology, Aarhus University

I'm hiring my first postdoc! Apply by 20/4/26, position #20443. Seeking an environmental microbiologist with experience in metagenomics (preferably viromics) and molecular biology. Experience with targeted metabolomics is a plus.
international.au.dk/about/profil...

1 month ago 20 27 1 2
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ATP synthase activity boosts membrane proton acceptance and lateral diffusion | PNAS In most organisms, ATP synthesis is powered by the proton motive force (pmf) and catalyzed by ATP synthase. While the chemiosmotic theory originall...

📣 I was waiting for this paper for a while 🥳
Our new paper in @pnas.org shows that ATP synthase drastically alters membrane properties related to proton diffusion. Funded by @volkswagenstiftung.de
www.pnas.org/doi/abs/10.1...

1 month ago 8 5 0 0
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Asgard #archaea: have we found our microbial ancestors?
New review (also for newcomers to the field!) by Christa Schleper and Thiago Rodrigues-Oliveira
link.springer.com/article/10.1...

1 month ago 49 26 1 1

Congratulations Lars Peter! @jakemckinlay.bsky.social's cable bacteria poster made a great 40th anniversary present.

1 month ago 1 1 0 0
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And The Microbes

www.andthemicrobes.org

1 month ago 1 0 0 0
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And The Microbes

OH MY GOSH I JUST FOUND THIS 😃

www.andthemicrobes.org

#comic #bacteria #phage #plasmids 🦠

1 month ago 12 4 0 0

14 more days left to apply for these two PhD positions in my team. Please share with your network!

2 months ago 6 6 0 0
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14 more days left to apply for these two postdoc positions in my team. Please share with your network!

2 months ago 6 6 0 0

"Previously in this class we used Prokka by @torstenseemann.bsky.social to annotate bacterial genomes. This always gave me an excuse to show an adorable picture of my daughter next to a quokka when she was a baby. Unfortunately, we are now using Bakta by @oschwengers.bsky.social."

2 months ago 4 0 0 0

Please share!

PhD position at the University of Copenhagen. Start date: 1st of June!
 
The project integrates field work, RNAseq, MALDI-MSI & FISH to explore composition, regulation, and resilience of termite host-gut symbiont metabolism.
 
👉 employment.ku.dk/phd?show=156...
 
⏳ Deadline 23/2/26

2 months ago 22 26 1 1
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Postdoc in Archaea Microbiology - Vacancy at Aarhus University Vacancy at Department of Biology - Microbiology, Aarhus University

Postdoc position on Asgard archaea in Thiago’s new lab for someone well trained in biochemistry, cloning, and protein purification:
international.au.dk/about/profil...

2 months ago 16 15 0 1
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Microbial Diversity | Marine Biological Laboratory The goal of the course is to teach professors, postdocs and advanced graduate students how to discover, cultivate, and isolate diverse microorganisms catalyzing a breadth of chemical transformations, ...

Want to ride the front of the wave of all-things-microbiology; field work, cultivation, microscopy, molecular, bioinformatics and AI tools? Me too!
Please join us @mblscience.bsky.social for the 2026 Summer Microbial Diversity Course!
Applications due soon.
www.mbl.edu/education/ad...

2 months ago 15 14 0 0

Regnormsekskrementer = earthworm excrement, right?

2 months ago 1 0 1 0
Highly efficient bio-catalytic oxygen reduction coupled to long-range electron transport in cable bacteria Multicellular cable bacteria are capable of transferring electrons over centimeter distances through an internal array of conductive fibers. These long, filamentous bacteria function as a living electrochemical cell, performing sulfide reduction at one end and oxygen reduction at the other end. To investigate how O2 reduction is linked to the long-distance electron transport along the conductive fibers, we performed a detailed electrochemical characterization of native filaments as well as extracted fiber skeletons without membranes or cytoplasm. Our data show that fibers skeletons only perform longitudinal electron transport and are not electrochemically active towards oxygen. This opposes a previous proposition that the conductive fiber network displays electrocatalytic behavior towards oxygen. Still, native cable bacterium filaments are capable of high oxygen reduction rates, thus demonstrating that dedicated enzyme systems in the periplasm or inner membrane are responsible for O2 reduction. Together, our data provide empirical support for a model in which diffusible c-type cytochromes mediate electron transport through the periplasm, shuttling electrons between separate respiratory complexes and the conductive fiber network. As such, our study resolves a crucial aspect of the unique electrogenic metabolism in cable bacteria, and clarifies the application potential of the highly conductive fibers in Bio-electrochemical System technologies. ### Competing Interest Statement The authors have declared no competing interest. Research Foundation - Flanders, https://ror.org/03qtxy027, S004523N, G0ADR25N, 11D7822N University of Antwerp, https://ror.org/008x57b05, TopBof European Innovation Council, PRINGLE 101046719

Highly efficient bio-catalytic oxygen reduction coupled to long-range electron transport in cable bacteria www.biorxiv.org/content/10.6... #jcampubs

2 months ago 6 5 0 0

Me too...

3 months ago 1 0 0 0
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Headline: "Scientists discover emperor penguin colony in Antarctica using satellite images"

Headline: "Scientists discover emperor penguin colony in Antarctica using satellite images"

Yesterday it was cows using tools, today its penguins using satellite imagery.

3 months ago 9123 2356 144 201

Oh that's cool, I'd never heard of shuf before. Neat exercise to try in other languages too, I just procrastinated from my real work by doing it in Julia:

using Random
shuffle(broadcast(*,["2" "3" "4" "5" "6" "7" "8" "9" "10" "J" "Q" "K" "A"],["♠","♥","♦","♣"]))

3 months ago 2 0 0 0