Ian Marshall @ianpgm.bsky.social · 02/10/2026Booking a meeting in Denmark, when looking for the meeting room in my building Outlook starts suggesting that I hold the meeting in various German towns, but that the Bundesland and country name should be spelt in Dutch... 000
Reposted by Ian MarshallArchaea Biology Vienna @archaea-vienna.bsky.social · 01/10/2026Our paper on the dynamics of Asgard archaea (Promethearchaeota) is now out in Nature! Huge thanks to the reviewers for helping make the manuscript stronger. www.nature.com/articles/s41... Two “Lokis” stained for Lokiactin (FastAct, magenta), reaching toward each other to celebrate 🎉 #archaea 514249
Ian Marshall @ianpgm.bsky.social · 29/09/2026SONS, DOTUR, MOTHUR and now STROLLUR - this is a beautiful multi-decade commitment 110
Reposted by Ian MarshallPat Schloss @patschloss.bsky.social · 29/09/2026It breaks my cold little heart that the IMMSA logo includes a stacked bar chart AND that they clearly didn't use subsampling or rarefaction to control for uneven sampling effort. 052
Ian Marshall @ianpgm.bsky.social · 25/09/2026I am so looking forward to not having students have to mess with installing Artemis any more... thanks for this! 000
Ian Marshall @ianpgm.bsky.social · 17/09/2026I appreciate funding agencies and universities who have a high-resolution version of their logo on a white background on their homepage for easy screenshotting and pasting into slides and posters. 000
Ian Marshall @ianpgm.bsky.social · 17/09/2026Happy International Microorganism Day from Aarhus University! 1142
Reposted by Ian MarshallMike Jetten @msmjetten.bsky.social · 17/09/2026Happy International Microbe Day! 🔬 On this day in 1683, Antoni van Leeuwenhoek sent his legendary letter describing "animalcules" to the Royal Society in London. Celebrating with a few of our favorite microbes and microbiologists! #anammox #methylomirabilis #methanoperedens @femsmicro.org 1137
Ian Marshall @ianpgm.bsky.social · 17/09/2026There's a great new spotlight article in @cp-trendsbiochem.bsky.social by @nmjgeerlings.bsky.social about cable bacteria and electrodes: www.cell.com/trends/bioch...cell.comCable bacteria use extracellular electron transferRecent work by Aiyer and colleagues demonstrates that cable bacteria can conserve energy and grow under anoxic conditions by transferring electrons to electrodes via extracellular electron transfer. T... 053
Reposted by Ian MarshallJohn Spear @spearmicrobe.bsky.social · 04/09/2026Microbial Diversity 2026 @mblscience.bsky.social was outstanding this year! If you’d like to join us next year, apply in late January, early February and spread the word. www.youtube.com/watch?v=7VUY...youtube.comFocus on: Microbial Diversity at Marine Biological LaboratoryYouTube video by Marine Biological Laboratory 01110
Ian Marshall @ianpgm.bsky.social · 06/09/2026Although this freely available version of the Equal Earth is awesome, I might need to put it up in my office: www.equal-earth.com/Equal-Earth-...equal-earth.com 000
Ian Marshall @ianpgm.bsky.social · 06/09/2026Equal Earth is cool, but it's no Fuller projection. Getting this map put up in the Biology Dept. lunch room is probably my biggest achievement so far. 110
Reposted by Ian MarshallSven T. Stripp @stripplab.bsky.social · 02/09/2026Give this brief story a read & reach out to Chris @greening.bsky.social if you can help. RP appreciated ❤️ 011
Reposted by Ian MarshallAmelia Rotaru @ameliarotaru.bsky.social · 01/09/2026🚨 JOB ALERT🚨 Please repost! An exciting PhD position is now open in Niculina Musat’s team at Aarhus University! The successful candidate will become part of the PROMETHEUS initiative, developing advanced tools to visualize, & better understand, microbe–electrode interfaces. 🔬⚡🦠phd.nat.au.dkDeveloping advanced imaging tools to understand microbe–electrode interfaces 167
Ian Marshall @ianpgm.bsky.social · 01/09/2026Two PhD positions with me at Aarhus University in Denmark are now open for applicants: phd.nat.au.dk/for-applican... Deadline November 1. Thanks @carlsbergfondet.dk!phd.nat.au.dkAnaerobic growth of aerobic methane-oxidising bacteria 02117
Ian Marshall @ianpgm.bsky.social · 28/08/2026Reading this from Denmark is just surreal... everyone here's in a union, or subject to its collective bargaining: postdocs, faculty, staff. I haven't noticed any negative affects on mentor-mentee relationships, neither when I was a postdoc nor now as faculty. 3943
Reposted by Ian MarshallSILVA @arb-silva.bsky.social · 26/08/2026📢 We are excited to announce that the new SILVA 144 Release is now live! See more details here: www.arb-silva.de/news/item/si...arb-silva.deSILVA Release 144 is here 12013
Reposted by Ian MarshallPaul Rainey @paulbrainey.bsky.social · 21/08/2026A third-year student draws poster PS3.20.305 -- far corner, farthest wall -- and commits to standing there two hours. Barely anyone makes it that far. Two floors up, a senior colleague is having the week of his life. Same conference. A new essay. academicrenewal.substack.com/p/why-we-sti...academicrenewal.substack.comWhy we still flyThe scientific conference was invented to solve a transport problem we no longer have. What is it for now? 12711
Ian Marshall @ianpgm.bsky.social · 18/08/2026Just saw an AI transcript of a meeting I had with someone in Danish - wow, either I'm much worse at pronouncing Danish than I thought or AI is not good at understanding speakers of Danish as a second language. It's complete gobbledygook... 020
Reposted by Ian MarshallThe New Yorker @newyorker.com · 13/08/2026Scientists once thought that life-sustaining oxygen existed only near Earth’s surface. Then they detected it deep underground. www.newyorker.com/science/elem...newyorker.comThe Mystery of Dark OxygenScientists once thought that life-sustaining oxygen existed only near Earth’s surface. Then they detected it deep underground. 0288
Reposted by Ian MarshallKartik Aiyer @kartiksaiyer.bsky.social · 13/07/2026Happy to share our new paper on cable bacteria. Motivated by the lack of pure cultures, we developed a standardized artificial sediment system that supports repeated cultivation of freshwater and marine cable bacteria under controlled conditions. Link: doi.org/10.1093/isme...doi.orgArtificial sediments enable reproducible cultivation and recapitulate ecological interactions of cable bacteriaAbstract. Cable bacteria are filamentous microbes that couple sulfide oxidation to oxygen reduction over centimeter distances via long-distance electron tr 173
Reposted by Ian MarshallMagda(lena) Wutkowska @wutkowska.bsky.social · 07/07/2026Isolation of Allocrenothrix methanica reveals distinct ecophysiologies of filamentous methanotrophs and adaptations to O2 limitation academic.oup.com/ismej/articl...academic.oup.comIsolation of Allocrenothrix methanica reveals distinct ecophysiologies of filamentous methanotrophs and adaptations to O2 limitationAbstract. Ferdinand Cohn observed abundant filamentous bacteria in drinking water wells in 1870 that he named Crenothrix polyspora. Subsequent research has 021
Reposted by Ian MarshallJason Hickel @jasonhickel.bsky.social · 05/07/2026I predicted that even if their AI found ways to improve efficiency, Google's energy use would go up, not down. Seven years later and this is where we're at: 5331132
Ian Marshall @ianpgm.bsky.social · 03/07/2026Four new Associate/Full Professor positions at Aarhus University @au.dk Faculty of Natural Sciences with focus on innovation, i.e. if you have especially strong links to the world outside academia (maybe you've been in industry for some years and are looking to come back?): www.au.dk/om/stillinge...au.dkProfessor or Associate Professor within the natural sciences, with a focus on Innovation (4 positions) - Ledig stilling på Aarhus UniversitetLedig stilling ved Natural Sciences, Aarhus Universitet 047
Reposted by Ian MarshallMichael Sieber @michaelsieber.bsky.social · 01/07/2026Have ideas for your own, independent research program in Theoretical Biology? Then come and join us as a Group Leader at the @mpi-evolbio.bsky.social in Plön, Germany!mpg.deGroup Leader in Theoretical Biology (m/f/d)Experience in Theoretical Biology, Applied Mathematics, Theoretical Physics 07383
Reposted by Ian MarshallIlnam Kang @ilnamkang.bsky.social · 30/06/2026A simple mathematical model for the discontinuity in average nucleotide identity distributions in prokaryotes doi.org/10.21203/rs....doi.orgA simple mathematical model for the discontinuity in average nucleotide identity distributions in prokaryotesMicrobial species exist as discrete genomic clusters, and evidence of this is the well-documented discontinuity in average nucleotide identity distributions—the ANI gap. Today, thresholds within... 033
Ian Marshall @ianpgm.bsky.social · 26/06/2026Sampling in Fløjstrup Skov south of Aarhus with masters student Jeppe (left) and postdoc Justus (right). 140
Reposted by Ian MarshallDaan Speth @daanspeth.bsky.social · 26/06/2026I'm happy to announce the release of GlobDB r232! This version contains 346,233 bacterial and archaeal genomes, based on 26 datasets. More info globdb.org 🦠🖥️🧬globdb.orghome | GlobDB 24623
Ian Marshall @ianpgm.bsky.social · 25/06/2026I'm very lucky that I got to be involved with this - I bumped into Peter and @cuwelte.bsky.social at just the right time! Thanks for including me! We're in for a major re-think about what methanotrophic bacteria are capable of. 120
Reposted by Ian MarshallAmelia Rotaru @ameliarotaru.bsky.social · 17/06/2026Check out this lovely piece of work by Jan V. Henkel and the AU team in collaboration with us at SDU and colleagues at AAU. Congrats Jan!!!! journals.asm.org/doi/10.1128/... Jan discovered the tiny microbes that make their home on ferromagnetic particles in the SMTZ of Baltic Sea sediments! 🦠 🧲 🦠doi.orgDesulfatiglans-related bacteria associated with conductive mineral particles in marine subsurface sediments | mBioAcetate is a central intermediate in the anaerobic breakdown of organic matter. In Baltic Sea sediments at and below the sulfate–methane transition zone, we observed acetate oxidation to carbon dioxid... 183
Reposted by Ian MarshallCameron Thrash @jcamthrash.bsky.social · 15/06/2026Desulfatiglans-related bacteria associated with conductive mineral particles in marine subsurface sediments journals.asm.org/doi/10.1128/... #jcampubs 033
Ian Marshall @ianpgm.bsky.social · 27/05/2026Have a look at our new paper on sulfur metabolism in cable bacteria, first author Lea Plum-Jensen: academic.oup.com/ismej/advanc... It's an interesting case of a pathway gap being filled using AlphaFold and subsequently verified biochemically. @ismepublications.bsky.socialacademic.oup.comDistribution of a novel DsrEFH sulfur transferase suggests widespread sulfur oxidation capacity in sulfate reducersAbstract. Microbial sulfur cycling is typically divided into an oxidative and a reductive branch, with microbes driving either sulfide oxidation or sulfate 0114
Reposted by Ian MarshallJonathan Eisen @phylogenomics.bsky.social · 25/05/2026A very important preprint to check out: The holobiont is not a useful model for most host-microbiome interactions By Gavin M Douglas an S. Andrew Inkpen ecoevorxiv.org/repository/v...ecoevorxiv.orgThe holobiont is not a useful model for most host-microbiome interactions 26220
Reposted by Ian MarshallEvgenii Protasov @evgenii-protasov.bsky.social · 22/05/2026Extracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration #microbiology #bacteria #MicroSky @natcomms.nature.com www.nature.com/articles/s41...nature.comExtracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration - Nature CommunicationsIn this study, the authors show that cable bacteria perform extracellular electron transfer via direct and flavin-mediated pathways, which enables growth under anoxic conditions at rates comparable to... 042
Reposted by Ian MarshallHeidi Aronson, PhD @heidi-aronson.bsky.social · 21/05/2026Published! 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.comAcetogenic Methane‐Carbon Monoxide Comproportionation: An Exergonic but Unobserved Microbial MetabolismCarbon comproportionation reactions are an underexplored class of carbon redox processes relevant to microbial energy conservation Methane-carbon monoxide comproportionation to acetate is exergon... 074
Reposted by Ian MarshallKartik Aiyer @kartiksaiyer.bsky.social · 21/05/2026Happy to share our work in @natcomms.nature.com Link: www.nature.com/articles/s41... We show that cable bacteria can actively grow under anoxic conditions using extracellular electron transfer to insoluble electron acceptors, with growth rates comparable to aerobic respiration.nature.comExtracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration - Nature CommunicationsIn this study, the authors show that cable bacteria perform extracellular electron transfer via direct and flavin-mediated pathways, which enables growth under anoxic conditions at rates comparable to... 155
Reposted by Ian MarshallCameron Thrash @jcamthrash.bsky.social · 20/05/2026Extracellular electron transfer in cable bacteria enables growth rates comparable to aerobic respiration www.nature.com/articles/s41... #jcampubs 0138
Reposted by Ian MarshallCenter for Electromicrobiology @cemau.bsky.social · 14/05/2026Are you a student looking for an exciting bachelor's, master's or Biology project? We recommend checking out the updated projects on CEM’s webpage: Join Us! You also find the projects on Biology - Aarhus University's Student Project Shop! 📍Find the available projects through the link in the comments 202
Ian Marshall @ianpgm.bsky.social · 13/05/2026In case anyone is curious: according to Perth Airport security, Vegemite counts as a liquid or a gel (not sure which one). 030
Ian Marshall @ianpgm.bsky.social · 11/05/2026bio.au.dk/om-institutt...bio.au.dkTenure-track Assistant/Associate Professor/Professor in Ecophysiology and Ecology Department of Biology, Faculty of Natural Sciences, Aarhus University, Denmark - Ledig stilling på Aarhus UniversitetLedig stilling ved Institut for Biologi, Aarhus Universitet 014
Reposted by Ian MarshallUlisse Cardini @symbiostoic.bsky.social · 11/05/2026🪸 We're hiring a PhD student in microbial ecology of crustose coralline algae! Fully funded 3-year position jointly hosted at SZN Genova & MPI-MM Bremen, with fieldwork in Belize, Seychelles & Fiji. ⏰ Deadline: May 21, 2026 #PhD #MarineScience #Microbiology #OpenPositionmarinesymbiomes.euOpen position: PhD scholarship in microbial ecology of coralline algae - Marine Symbiomes Research GroupWe invite applications for a PhD student to work on the microbiomes of crustose coralline algae (CCA) across tropical mangrove–seagrass–reef corridors. 0715
Reposted by Ian MarshallGonzalo Gomez Saez @ggomezsaez.bsky.social · 11/05/2026Many ocean microbes have the genetic potential of consuming taurine, a key organosulfur compound, but it is unclear how this activity is linked to the worldwide decline in oxygen levels. Here, we found by 13C-DOS qSIP that taurine was only used as a C source in hypoxic waters of the Mariager Fjord. 1104
Ian Marshall @ianpgm.bsky.social · 01/05/2026My group was supposed to meet last night but we couldn't all make it, so we ended up meeting to paint watercolours instead. 100
Reposted by Ian MarshallRamunas Stepanauskas @rstepanauskas.bsky.social · 28/04/2026Two positions at Aalborg University (Denmark) in microbial single cell genomics: Laboratory Engineer → aau.varbi.com/what:job/job... Bioinformatics Engineer → aau.varbi.com/what:job/job... Deadline: May 8, 2025 #Hiring #Microbiology #Bioinformatics #SingleCell #Microbiome #Denmarkaau.varbi.comBioinformatics Engineer in Microbial Single-Cell GenomicsDo you want to lead the development of bioinformatics infrastructure for a state-of-the-art research laboratory dedicated to exploring the amazingly abundant and diverse life of environmental microorg 049
Ian Marshall @ianpgm.bsky.social · 24/04/2026That's an impressive looking medal, congratulations @carolineslomp.bsky.social! 000
Reposted by Ian MarshallKartik Aiyer @kartiksaiyer.bsky.social · 17/04/2026Pleased 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...biorxiv.org 112
Reposted by Ian MarshallPaul Rainey @paulbrainey.bsky.social · 09/04/2026Multiple 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 🙏 1720
Reposted by Ian MarshallKartik Aiyer @kartiksaiyer.bsky.social · 11/04/2026Excited 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...sciencedirect.comBreathing both ways: simultaneous aerobic–anaerobic respiration in microbesMicroorganisms have historically been classified as obligate aerobes or anaerobes, facultative anaerobes, or microaerophiles, reflecting differences i… 1187
Reposted by Ian MarshallCenter for Electromicrobiology @cemau.bsky.social · 09/04/2026Retreat 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 041
Reposted by Ian MarshallElla Sieradzki @sieravirus.bsky.social · 09/04/2026Deadline is April 20th! Let’s get those viruses 01115