Krzysztof T Jurdzinski
@ktjurdzinski.bsky.social
PhD student at Anders Andersson's lab at KTH/SciLifeLab, Stockholm. Microbial ecologist, evolutionary biologist, bioinformatician.
https://ktjmicrobes.com/
https://ktjmicrobes.com/
Pinned
Distinct bacterial and protist plankton diversity dynamics uncovered through DNA-based monitoring in the Baltic Sea area
Planktonic microorganisms in coastal waters form the base of food webs and biogeochemical cycles. The Baltic Sea area, with its pronounced environmental gradients, serves as a model coastal environmen...
www.biorxiv.org
1/10
The latest preprint in my PhD just went through a major internal revision. More focused and less confounded, it deserves re-introduction.
Highlight still the same: Bacteria are ecologically more sensitive to salinity than protists.
www.biorxiv.org/content/10.1...
#MicroSky #ProtistsOnSky
The latest preprint in my PhD just went through a major internal revision. More focused and less confounded, it deserves re-introduction.
Highlight still the same: Bacteria are ecologically more sensitive to salinity than protists.
www.biorxiv.org/content/10.1...
#MicroSky #ProtistsOnSky
Reposted by Krzysztof T Jurdzinski
📢 New preprint on bioRxiv!
We introduce V4-EXT, a revised 16S rRNA V4 primer set that dramatically improves detection of Patescibacteria and other undersampled lineages
✅ 938 samples
✅ More novel ASVs
Primer choice matters 👀
www.biorxiv.org/content/10.1...
@ppjevac.bsky.social #HuifengHu
We introduce V4-EXT, a revised 16S rRNA V4 primer set that dramatically improves detection of Patescibacteria and other undersampled lineages
✅ 938 samples
✅ More novel ASVs
Primer choice matters 👀
www.biorxiv.org/content/10.1...
@ppjevac.bsky.social #HuifengHu
November 27, 2025 at 5:38 PM
📢 New preprint on bioRxiv!
We introduce V4-EXT, a revised 16S rRNA V4 primer set that dramatically improves detection of Patescibacteria and other undersampled lineages
✅ 938 samples
✅ More novel ASVs
Primer choice matters 👀
www.biorxiv.org/content/10.1...
@ppjevac.bsky.social #HuifengHu
We introduce V4-EXT, a revised 16S rRNA V4 primer set that dramatically improves detection of Patescibacteria and other undersampled lineages
✅ 938 samples
✅ More novel ASVs
Primer choice matters 👀
www.biorxiv.org/content/10.1...
@ppjevac.bsky.social #HuifengHu
Reposted by Krzysztof T Jurdzinski
The surprising crab-trap–pulling behavior is described in this article: onlinelibrary.wiley.com/doi/10.1002/...
We recently published a paper on how animal tool use is conceptualized, offering a framework to make sense of its different forms 👇📃 www.cambridge.org/core/journal... #evosky #philsci
We recently published a paper on how animal tool use is conceptualized, offering a framework to make sense of its different forms 👇📃 www.cambridge.org/core/journal... #evosky #philsci
November 27, 2025 at 5:17 PM
The surprising crab-trap–pulling behavior is described in this article: onlinelibrary.wiley.com/doi/10.1002/...
We recently published a paper on how animal tool use is conceptualized, offering a framework to make sense of its different forms 👇📃 www.cambridge.org/core/journal... #evosky #philsci
We recently published a paper on how animal tool use is conceptualized, offering a framework to make sense of its different forms 👇📃 www.cambridge.org/core/journal... #evosky #philsci
Reposted by Krzysztof T Jurdzinski
I am very excited to announce that a fully funded PhD position is available in my group.
Topic: Synergistic coevolution in mono-specific and multi-species microbial consortia
Please RT or forward this information to interested candidates.
Deadline: 11.01.26
More info:
shorturl.at/f1TuF
Topic: Synergistic coevolution in mono-specific and multi-species microbial consortia
Please RT or forward this information to interested candidates.
Deadline: 11.01.26
More info:
shorturl.at/f1TuF
November 27, 2025 at 2:24 PM
I am very excited to announce that a fully funded PhD position is available in my group.
Topic: Synergistic coevolution in mono-specific and multi-species microbial consortia
Please RT or forward this information to interested candidates.
Deadline: 11.01.26
More info:
shorturl.at/f1TuF
Topic: Synergistic coevolution in mono-specific and multi-species microbial consortia
Please RT or forward this information to interested candidates.
Deadline: 11.01.26
More info:
shorturl.at/f1TuF
Reposted by Krzysztof T Jurdzinski
I am very excited to start my new position as a Ramón y Cajal fellow @ageinves.bsky.social @cienciagob.bsky.social at the ICBiBE @uv.es! I'm coming home! It feels great to deliver new science for my country!
November 27, 2025 at 1:37 PM
I am very excited to start my new position as a Ramón y Cajal fellow @ageinves.bsky.social @cienciagob.bsky.social at the ICBiBE @uv.es! I'm coming home! It feels great to deliver new science for my country!
Reposted by Krzysztof T Jurdzinski
Optimized k-mer search across millions of bacterial genomes on laptops https://www.biorxiv.org/content/10.1101/2025.11.23.690050v1
November 26, 2025 at 4:47 PM
Optimized k-mer search across millions of bacterial genomes on laptops https://www.biorxiv.org/content/10.1101/2025.11.23.690050v1
Reposted by Krzysztof T Jurdzinski
Our new paper in PNAS summarises why the push to 'salvage' log dead trees won't reduce the risk of fast wildfires as has been claimed.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
November 24, 2025 at 11:36 PM
Our new paper in PNAS summarises why the push to 'salvage' log dead trees won't reduce the risk of fast wildfires as has been claimed.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
Reposted by Krzysztof T Jurdzinski
Come join us! Soon I will be advertising a postdoc vacancy in my group as part of my @erc.europa.eu AdG project 'DARK ROOTS'. Focus of the project will be on phylo- and metagenomic mining of novel prokaryotic lineages. I will soon post a link here - stay tuned, and please repost! #asgardarchaea
a man walking in a field with an umbrella
ALT: a man walking in a field with an umbrella
media.tenor.com
November 26, 2025 at 3:39 PM
Come join us! Soon I will be advertising a postdoc vacancy in my group as part of my @erc.europa.eu AdG project 'DARK ROOTS'. Focus of the project will be on phylo- and metagenomic mining of novel prokaryotic lineages. I will soon post a link here - stay tuned, and please repost! #asgardarchaea
Reposted by Krzysztof T Jurdzinski
Overestimated natural biological nitrogen fixation translates to an exaggerated CO2 fertilisation effect in Earth system models
...meaning models may overestimate future plant carbon uptake as CO2 rises
Better nitrogen modelling = better climate predictions
www.pnas.org/doi/10.1073/...
...meaning models may overestimate future plant carbon uptake as CO2 rises
Better nitrogen modelling = better climate predictions
www.pnas.org/doi/10.1073/...
Overestimated natural biological nitrogen fixation translates to an exaggerated CO2 fertilization effect in Earth system models | PNAS
CO2 fertilization of the terrestrial biosphere is limited by nitrogen. Biological
nitrogen fixation (BNF) is the dominant natural nitrogen source t...
www.pnas.org
November 25, 2025 at 8:40 PM
Overestimated natural biological nitrogen fixation translates to an exaggerated CO2 fertilisation effect in Earth system models
...meaning models may overestimate future plant carbon uptake as CO2 rises
Better nitrogen modelling = better climate predictions
www.pnas.org/doi/10.1073/...
...meaning models may overestimate future plant carbon uptake as CO2 rises
Better nitrogen modelling = better climate predictions
www.pnas.org/doi/10.1073/...
Reposted by Krzysztof T Jurdzinski
Just uploaded our new preprint to @ecoevorxiv.bsky.social
Multinucleate life really is everywhere...from deep sea forams to slime molds, intracellular parasites, and beyond. 🚀
We explore how scaling, ecology, & evolution intersect when many nuclei share a single cytoplasm.
doi.org/10.32942/X2M...
Multinucleate life really is everywhere...from deep sea forams to slime molds, intracellular parasites, and beyond. 🚀
We explore how scaling, ecology, & evolution intersect when many nuclei share a single cytoplasm.
doi.org/10.32942/X2M...
November 26, 2025 at 3:06 PM
Just uploaded our new preprint to @ecoevorxiv.bsky.social
Multinucleate life really is everywhere...from deep sea forams to slime molds, intracellular parasites, and beyond. 🚀
We explore how scaling, ecology, & evolution intersect when many nuclei share a single cytoplasm.
doi.org/10.32942/X2M...
Multinucleate life really is everywhere...from deep sea forams to slime molds, intracellular parasites, and beyond. 🚀
We explore how scaling, ecology, & evolution intersect when many nuclei share a single cytoplasm.
doi.org/10.32942/X2M...
Reposted by Krzysztof T Jurdzinski
The cold water tintinnid ciliate Parafavella elegans & some diatoms from the Chukchi Sea last summer- almost the end of the Arctic samples....
November 26, 2025 at 1:57 PM
The cold water tintinnid ciliate Parafavella elegans & some diatoms from the Chukchi Sea last summer- almost the end of the Arctic samples....
Reposted by Krzysztof T Jurdzinski
So happy to announce our new preprint, “A geothermal amoeba sets a new upper temperature limit for eukaryotes.” We cultured a novel amoeba from Lassen Volcanic NP (CA, USA) that divides at 63°C (145°F) 🔥 - a new record for euk growth!
#protistsonsky 🧵
#protistsonsky 🧵
November 25, 2025 at 8:41 PM
So happy to announce our new preprint, “A geothermal amoeba sets a new upper temperature limit for eukaryotes.” We cultured a novel amoeba from Lassen Volcanic NP (CA, USA) that divides at 63°C (145°F) 🔥 - a new record for euk growth!
#protistsonsky 🧵
#protistsonsky 🧵
Reposted by Krzysztof T Jurdzinski
Models and co-culture experiments assess four mechanisms of phytoplankton–bacteria interactions www.nature.com/articles/s41... #jcampubs
Models and co-culture experiments assess four mechanisms of phytoplankton–bacteria interactions - Nature Microbiology
Mathematical representations of overflow metabolism, mixotrophy, exoenzymes and reactive oxygen species detoxification recapitulate dynamics in co-cultures of Prochlorococcus and eight heterotrophic b...
www.nature.com
November 24, 2025 at 2:52 PM
Models and co-culture experiments assess four mechanisms of phytoplankton–bacteria interactions www.nature.com/articles/s41... #jcampubs
Reposted by Krzysztof T Jurdzinski
I am pleased to announce our latest paper on #nutrient availability and impact on the microbial ecology of acidic pit lakes. It takes us a step closer to understand nutrient cycling in these #extreme #environments for the development of in situ bioremediation.
doi.org/10.3390/min1...
doi.org/10.3390/min1...
November 22, 2025 at 4:36 PM
I am pleased to announce our latest paper on #nutrient availability and impact on the microbial ecology of acidic pit lakes. It takes us a step closer to understand nutrient cycling in these #extreme #environments for the development of in situ bioremediation.
doi.org/10.3390/min1...
doi.org/10.3390/min1...
Reposted by Krzysztof T Jurdzinski
We just launched the Kickstarter campaign of MicroMates, a card game that brings the hidden world of microorganisms to life in a fun, colorful, and scientifically inspired way. Please back us up and spread the word! micromates.se
September 25, 2025 at 6:15 PM
We just launched the Kickstarter campaign of MicroMates, a card game that brings the hidden world of microorganisms to life in a fun, colorful, and scientifically inspired way. Please back us up and spread the word! micromates.se
Reposted by Krzysztof T Jurdzinski
Our paper describing the GlobDB is now published in @bioinfoadv.bsky.social
doi.org/10.1093/bioa...
The GlobDB is the largest species dereplicated genome database currently available, containing 306,260 species representatives.
More information on globdb.org 1/5
🖥️🧬🦠
doi.org/10.1093/bioa...
The GlobDB is the largest species dereplicated genome database currently available, containing 306,260 species representatives.
More information on globdb.org 1/5
🖥️🧬🦠
GlobDB: a comprehensive species-dereplicated microbial genome resource
AbstractMotivation. Over the past years, substantial numbers of microbial species’ genomes have been deposited outside of conventional INSDC databases.Resu
doi.org
November 21, 2025 at 4:21 PM
Our paper describing the GlobDB is now published in @bioinfoadv.bsky.social
doi.org/10.1093/bioa...
The GlobDB is the largest species dereplicated genome database currently available, containing 306,260 species representatives.
More information on globdb.org 1/5
🖥️🧬🦠
doi.org/10.1093/bioa...
The GlobDB is the largest species dereplicated genome database currently available, containing 306,260 species representatives.
More information on globdb.org 1/5
🖥️🧬🦠
Reposted by Krzysztof T Jurdzinski
📢 Save the Date: Biodiversity Monitoring Week is coming! #BioMonWeek2026
📅 4-8 May
📍 Montpellier (FR)
The new European forum for cooperation and innovation in biodiversity monitoring, gathering researchers, practitioners, policymakers, private sector & students. Don't miss out!
📅 4-8 May
📍 Montpellier (FR)
The new European forum for cooperation and innovation in biodiversity monitoring, gathering researchers, practitioners, policymakers, private sector & students. Don't miss out!
November 20, 2025 at 10:00 AM
📢 Save the Date: Biodiversity Monitoring Week is coming! #BioMonWeek2026
📅 4-8 May
📍 Montpellier (FR)
The new European forum for cooperation and innovation in biodiversity monitoring, gathering researchers, practitioners, policymakers, private sector & students. Don't miss out!
📅 4-8 May
📍 Montpellier (FR)
The new European forum for cooperation and innovation in biodiversity monitoring, gathering researchers, practitioners, policymakers, private sector & students. Don't miss out!
Reposted by Krzysztof T Jurdzinski
Is it a flagellate? A tiny ball with tentacles? Contamination in my ciliate culture? NEW SUPERGROUP OF EUKARYOTES? Yes to all 4! Meet Solarion - just out in #Nature doi.org/10.1038/s415... Huge congrats to Marek Valt, Cepicka Lab & the star team! Very happy to be part of this project. #ProtistsOnSky
November 19, 2025 at 9:39 PM
Is it a flagellate? A tiny ball with tentacles? Contamination in my ciliate culture? NEW SUPERGROUP OF EUKARYOTES? Yes to all 4! Meet Solarion - just out in #Nature doi.org/10.1038/s415... Huge congrats to Marek Valt, Cepicka Lab & the star team! Very happy to be part of this project. #ProtistsOnSky
Reposted by Krzysztof T Jurdzinski
Out today, our take on 6-methyladenine #6mA evolution in Eukaryotes @natgenet.nature.com. We asked a simple question, is really DNA 6mA common across the eukaryotes? The answer is "yes" if you're a unicellular eukaryote 🦠, not so if you're multicellular 🐝🌱🍄. www.nature.com/articles/s41... 1/9
Adenine DNA methylation associated with transcriptionally permissive chromatin is widespread across eukaryotes - Nature Genetics
Long-read sequencing in 18 unicellular eukaryotes reveals that 6mA is widespread across eukaryotes and is enriched at transcriptionally permissive regions, which are also marked by H3K4me3.
www.nature.com
November 18, 2025 at 12:00 PM
Out today, our take on 6-methyladenine #6mA evolution in Eukaryotes @natgenet.nature.com. We asked a simple question, is really DNA 6mA common across the eukaryotes? The answer is "yes" if you're a unicellular eukaryote 🦠, not so if you're multicellular 🐝🌱🍄. www.nature.com/articles/s41... 1/9
Reposted by Krzysztof T Jurdzinski
PhD studentship opportunity! Join us at St Andrews to study the factors controlling plasmid transmission in the gut. Competition-funded as part of the EASTBIO DTP, co-supervised with Dr Jaclyn Pearson. Please share & pass on to anyone interested! 🦠🧫 Deadline 15th December👇
www.findaphd.com
November 18, 2025 at 11:41 AM
PhD studentship opportunity! Join us at St Andrews to study the factors controlling plasmid transmission in the gut. Competition-funded as part of the EASTBIO DTP, co-supervised with Dr Jaclyn Pearson. Please share & pass on to anyone interested! 🦠🧫 Deadline 15th December👇
Reposted by Krzysztof T Jurdzinski
how to breathe oxygen at a distance? the cable bacteria apparently know the trick: wired...
#MicroSky
#MicroSky
Metal scaffolds turn bacteria into live wires
Mud-dwelling cable bacteria construct metal organic frameworks to grow
www.science.org
November 17, 2025 at 5:39 PM
how to breathe oxygen at a distance? the cable bacteria apparently know the trick: wired...
#MicroSky
#MicroSky
Reposted by Krzysztof T Jurdzinski
Bacteria have to adapt rapidly to changes in environment. Can they ‘remember’ those conditions? Another one for my “to read” pile! cc @microberamon.bsky.social @victoriachu.bsky.social @nickyuen.bsky.social @fratorelli.bsky.social #UTISky #MicroSky
#Review
Bacteria can “remember” past environments through genetic & biochemical imprints helping them adapt and thrive! 🦠🧠
#MicroSky
www.nature.com/articles/s41...
Bacteria can “remember” past environments through genetic & biochemical imprints helping them adapt and thrive! 🦠🧠
#MicroSky
www.nature.com/articles/s41...
Exploring the concept of bacterial memory - Nature Microbiology
This Perspective discusses the concept, mechanisms and evidence for memory in bacteria at individual and community levels.
www.nature.com
November 18, 2025 at 9:13 AM
Bacteria have to adapt rapidly to changes in environment. Can they ‘remember’ those conditions? Another one for my “to read” pile! cc @microberamon.bsky.social @victoriachu.bsky.social @nickyuen.bsky.social @fratorelli.bsky.social #UTISky #MicroSky
Reposted by Krzysztof T Jurdzinski
Conserved genetic markers reveal widespread diatom sexual reproduction in the global ocean | Nature Communications https://www.nature.com/articles/s41467-025-65296-9
Conserved genetic markers reveal widespread diatom sexual reproduction in the global ocean - Nature Communications
Diatoms dominate the oceans, yet sexual reproduction - key to bloom dynamics and species evolvability - is rarely observed. Using a lab-to-field approach, this study presents conserved markers applicable across datasets, revealing widespread sex in both abundant and rare taxa in diatom natural populations.
www.nature.com
November 15, 2025 at 9:29 AM
Conserved genetic markers reveal widespread diatom sexual reproduction in the global ocean | Nature Communications https://www.nature.com/articles/s41467-025-65296-9
Reposted by Krzysztof T Jurdzinski
We met with the “RNA guy” of the study, @marcfriedlander.bsky.social, who teamed up with @lovedalen.bsky.social (@stockholm-uni.bsky.social/@cpgsthlm.bsky.social) & @marmole6.bsky.social (@ucph.bsky.social) 🧪⚒️
Feature article here ↓ 🖥️ 🧬
www.scilifelab.se/news/worlds-...
Feature article here ↓ 🖥️ 🧬
www.scilifelab.se/news/worlds-...
The world’s oldest RNA extracted from woolly mammoth: “gives us a completely different picture”
The timespan of when RNA is possible to extract is now pushed back by tens of thousands of years, with researchers now hoping to spark a RNA revolution, after sequencing a woolly mammoth preserved in ...
www.scilifelab.se
November 14, 2025 at 4:11 PM
We met with the “RNA guy” of the study, @marcfriedlander.bsky.social, who teamed up with @lovedalen.bsky.social (@stockholm-uni.bsky.social/@cpgsthlm.bsky.social) & @marmole6.bsky.social (@ucph.bsky.social) 🧪⚒️
Feature article here ↓ 🖥️ 🧬
www.scilifelab.se/news/worlds-...
Feature article here ↓ 🖥️ 🧬
www.scilifelab.se/news/worlds-...
Reposted by Krzysztof T Jurdzinski
The core genomic backbone of bacteria is not necessarily resilient to gene flow! A new study shows that introgression impacts, on average, 2% of the core genes of species - www.nature.com/articles/s41... #microevo #microeco #evolution
Introgression impacts the evolution of bacteria, but species borders are rarely fuzzy - Nature Communications
It is commonly thought that bacterial species borders tend to be fuzzy, due to frequent exchange of DNA. Here, Diop et al. quantify the patterns of gene flow between core genomes across 50 major bacte...
www.nature.com
November 14, 2025 at 10:23 AM
The core genomic backbone of bacteria is not necessarily resilient to gene flow! A new study shows that introgression impacts, on average, 2% of the core genes of species - www.nature.com/articles/s41... #microevo #microeco #evolution
Reposted by Krzysztof T Jurdzinski
“Bin Chicken” is now published in Nature Methods! It substantially improves genome recovery through rational coassembly 🧬🖥️. Applied to public 🌍 metagenomes, we recovered 24,000 novel species 🦠, including 6 new phyla.
doi.org/10.1038/s415...
@benjwoodcroft.bsky.social @rhysnewell.bsky.social
🧵1/6
doi.org/10.1038/s415...
@benjwoodcroft.bsky.social @rhysnewell.bsky.social
🧵1/6
November 13, 2025 at 10:09 AM
“Bin Chicken” is now published in Nature Methods! It substantially improves genome recovery through rational coassembly 🧬🖥️. Applied to public 🌍 metagenomes, we recovered 24,000 novel species 🦠, including 6 new phyla.
doi.org/10.1038/s415...
@benjwoodcroft.bsky.social @rhysnewell.bsky.social
🧵1/6
doi.org/10.1038/s415...
@benjwoodcroft.bsky.social @rhysnewell.bsky.social
🧵1/6