Oct 1, The lab is awarded a $1M grant by the DOE BER and EPSCoR programs to study Methanomethylicia in diverse anoxic ecosystems. Our research will take us from hot springs to soil, from waste water to cow rumen, from marine sediments to bioreactors. The grant will fund the PhDs of Joelie and Nicole as well as the work of staff scientist Zack Jay.





Jul 24, New paper published in Nature: Methyl-reducing methanogenesis by a thermophilic culture of Korarchaeia​. Congrats to co-first authors Viola & Anthony!

This study describes the cultivation and physiology of a thermophilic methanol-reducing methanogen affiliated with the archaeal class Korarchaeia. Together with our other publication (see below) this study shows that methanogenesis is not restricted to the superphylum Euryarchaeota. The latter had been known to host all methanogens since the discovery of the archaeal domain by Carl Woese in the 1970ies.

MSU news story covering our research

This week in Microbiology podcast covers our work: audio herevideo here



Jul 24, New paper published in Nature: Cultivation and visualization of a methanogen of the phylum Thermoproteota. Congrats Anthony et al.!

This study demonstrates, for the first time, that methanogenesis is not confined to the Euryarchaeota. Anthony cultured a thermophilic archaeon from the phylum Thermoproteota (TACK superphylum) from a Yellowstone hot spring and demonstrated that it is a bona fide methanogen. CryoET work with the lab of Martin Pilhofer revealed the methanogen's unique ultrastructure, including cell-to-cell bridges through which cells share their cytoplasm.

MSU news story covering our research

This week in Microbiology podcast covers our work: audio here; video here





Jul 20, Out in PLoS Biology: George's Opus Magnum Multicellular magnetotactic bacterial consortia are metabolically differentiated and not clonal. We  studied the unique biology of multicellular magnetotactic bacteria, the only example of bacteria without a unicellular stage in their life cycle!   Editor' Choice Paper for 2024   PDF








Mar 19, Out in The ISME J: Methylotrophic methanogenesis in the Archaeoglobi: Cultivation of Ca. Methanoglobus hypatiae from a Yellowstone hot spring. Congrats Mack on a great piece of work that combines targeted cultivation, growth experiments, fluorescence and electron microscopy, stable isotope tracing, metagenomics, and metatranscriptomics!   PDF







Jan 10, George succesfully defends his PhD thesis. Congratulations Dr. Schaible!

George will start a postdoctoral position in the lab of Jean-Marie Volland at UC Santa Barbara in June 2024.



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Sep 6, New paper on the effects of spartina grass and diesel fuel addition to a salt marsh microbiome's activity is published in Frontiers in Microbiology. Congrats Erin Frates from Jeff Marlow's lab and former postdoc in our lab, Rachel Spietz, who share first authorship!   PDF






Jul 20, Roland is elected to co-vice-chair the GRC Applied and Environmental Microbiology meeting in 2025 together with Thulani Makhalanyane. Chair of this GRC will be Denise Akob. Thulani and Roland will then co-chair the meeting in 2027.







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​Hatzenpichler ​Environmental Microbiology Lab

99% of microbes currently cannot be grown in the lab. We seek to understand what this "uncultured majority" is doing and how its activity shapes Earth's biogeochemical cycles ​and life on our planet.

Recent and selected past events

​Sep 22-26, Zack at Extremophiles 2024 conference in Greece, presenting work on archaea in Yellowstone hot springs

Nov 9, Anthony presents at the International Conference on Geo-omics of Archaea in Shenzhen, China

Feb 7 2025, Roland gives seminar at Department of Civil and Environmental Engineering, MIT, MA

Mar 7 2025, Roland gives seminar at Department of Life Sciences, University of Nevada Las Vegas, NV

Apr 11 2025, Roland gives Donald C. Cox Lecture in Microbiology at the University of Oklahoma, Norman, OK

Apr 24 2024, Roland gives seminar at Department of Biological Sciences, University of Idaho, Moscow, ID

Jul 21 2025, Stavros gives talk at Gordon Research Conference on Archaea, Les Diablerets, Switzerland

Aug 26 2025, Roland gives seminar at Department of Biology, ETH Zurich, Switzerland

Aug 28 2025, Roland gives keynote at the annual meeting of the Swiss Society for Microbiology, Interlaken, Switzerland

Recent and upcoming research presentations

If you are a highly motivated prospective grad student or postdoc candidate, please contact Roland by email. Prospective graduate students interested in environmental microbiology or astrobiologycan can join us

via the Chem-Biochem, Microbiology and Cell Biology, or the Molecular BioSciences Program.