Dr. Martin T. Jahn

Dr. Martin T. Jahn

Forschungsbereich 3: Marine Ökologie

FE Marine Symbiosen

Raum: DW-310
Telefon: +49 431 600-4486
Fax: +49 431 600-4482
E-Mail: mjahn(at)geomar.de


Düsternbrooker Weg 20 D-24105 Kiel




  • since February 2020: Postdoctoral researcher at the Zoology & Biochemistry departments, University of Oxford. Research in Bioinformatics, Imaging, Molecular Biology and Microbiology
  • Dec 2019 PhD degree "Physiology, syntrophy and viral interplay in the marine sponge holobiont"
  • March 2015 - Dec 2019 Doctoral project: "Physiology, syntrophy and viral interplay in the marine sponge holobiont" Supervisor: Prof. Ute Hentschel Humeida, Helmholtz Centre for Ocean Research GEOMAR Kiel, Germany
  • Oct 2012 - Dec 2014 Master in Biology (MSc), University of Würzburg, Germany. Majors: Gene Regulation and Signal Transduction, Microbial and Chemical Ecology, Animal Ecology
  • Oct 2009 - Aug 2012 Bachelor in Biology (BSc), University of Würzburg, Germany

Research interests

Microorganisms, although amongst the smallest players in ecosystems, have major impact on all organization levels from the species to the biosphere. The aim of my PhD project is to investigate functional determinants of symbiosis between sponges and their associated microbiomes. The pursued approach combines single- cell genomic and metatranscriptomic datasets followed by qRT-PCR validation. Selected findings are further assessed using immunohistochemistry and electron microscopy.


In a nutshell:

  • Molecular Basis of Host- Microbe and Microbe- Microbe Interactions
  • Microbial Landscape Ecology
  • Combining Bioinformatics (Machine Learning, RNAseq, Metagenomics) with High Resolution Imaging

ORCID iD iconorcid.org/0000-0001-8322-9334



Jahn M.T., Arkhipova, K, Markert S.M., Stigloher C., Lachnit T., Pita L., Kupczok A., Ribes M., Stengel S.T., Rosenstiel P., Dutilh B.E., Hentschel U. (2019). A Phage Protein Aids Bacterial Symbionts in Eukaryote Immune Evasion. Cell Host & Microbe. Published: September 24,2019 doi: 10.1016/j.chom.2019.08.019

Rausch, P., Rühlemann, M., Hermes, B. M., Doms, S., Dagan, T., Dierking, K., Domin, H., Fraune, S., von Frieling, J., Hentschel, U., Heinsen, F.-A., Höppner, M., Jahn, M. T., Jaspers, C., Kissoyan, K. A. B., Langfeldt, D., Rehman, A., Reusch, T. B. H., Roeder, T., Schmitz, R. A., Schulenburg, H., Soluch, R., Sommer, F., Stukenbrock, E., Weiland-Bräuer, N., Rosenstiel, P., Franke, A., Bosch, T. and Baines, J. F. (2019). Comparative analysis of amplicon and metagenomic sequencing methods reveals key features in the evolution of animal metaorganisms. Microbiome 7(1): 133; doi: 10.1186/s40168-019-0743-1

Slaby B.M., Franke A, Rix L, Pita L, Bayer K, Jahn M.T., Hentschel U (2019) Marine Sponge Holobionts in Health and Disease. In: Li Z, editor. Symbiotic Microbiomes of Coral Reefs Sponges and Corals. Dordrecht: Springer Netherlands. p.81-104. https://link.springer.com/chapter/10.1007/978-94-024-1612-1_7

Hildebrand F, Moitinho-Silva L, Blasche S, Jahn M.T., Gossmann T.I., Heuerta-Cepas J, Hercog R, Luetge M, Bahram M, Pryszlak A, Alves R.J., Waszak S.M., Zhu A, Ye L, Costea P.I., Aalvink S, Belzer C, Forslund S.K., Sunagawa S, Hentschel U, Merten C, Patil K.R., Benes V, Bork P (2019). Antibiotics-induced monodominance of a novel gut bacterial order. Gut. doi: 10.1136/gutjnl-2018-317715

Bayer K, Jahn M.T. , Slaby B.M., Moitinho-Silva L and Hentschel U (2018). Marine Sponges as Chloroflexi Hot Spots: Genomic Insights and High-Resolution Visualization of an Abundant and Diverse Symbiotic Clade. mSystems 3:e00150-18. doi: 10.1128/mSystems.00150-18

Millins C, Dickinson E. R., Isakovic P, Gilbert L, Wojciechowska A, Paterson V, Tao F, Jahn M.T., Kilbride E, Birtles R, Johnson R, Biek R (2018). Landscape structure affects the prevalence and distribution of a tick-borne zoonotic pathogen. Parasit Vectors 11(1): 621; doi: 1186/s13071-018-3200-2

Moitinho-Silva L, Díez-Vives C, Batani G, Esteves A.I.S., Jahn M.T., Thomas T (2017) Integrated metabolism in sponge-microbe symbiosis revealed by genome-centered metatranscriptomics. ISME J; doi: 10.1038/ismej.2017.25

Jahn M.T.,  Markert S.M., Ryu T, Ravasi T, Stigloher C, Hentschel U, Moitinho-Silva (2016) Shedding light on cell compartmentation in the candidate phylum Poribacteria by high resolution visualisation and transcriptional profiling. Sci. Rep. 6, 35860; doi: 10.1038/srep35860

Horn H, Slaby B, Jahn M.T., Bayer K, Moitinho-Silva L, Förster F, Abdelmohsen U.R., Hentschel U (2016) An enrichment of CRISPR and other defense-related features in marine sponge-associated microbial metagenomes. Front. Microbiol. 7:1751; doi: 10.3389/fmicb.2016.01751

Jahn M.T., Schmidt K., Mock, T. (2014) A novel cost effective and high-throughput isolation and identification method for marine microalgae. Plant Methods 10:26; doi: 10.1186/1746-4811-10-26



2017: Young Investigator Award CRC1182 Origin and Functions of Metaorganisms

2017: Poster prize Gordon Research Conference: Animal-Microbe-Symbioses, Mount Snow, USA

2016: Poster prize EMBL-Conference: From 3D Light to 3D Electron Microscopy, Heidelberg

2015: Fellowship of the Graduate School of Life Sciences (GSLS), University of Würzburg

Contributions to Meetings and Symposia:

Poster: Jahn M.T., Arkhipova K., Markert S.M., Stigloher C., Lachnit T., Pita L., Kupczok A., Ribes M., Stengel S.T., Rosenstiel P., Dutilh B.E., Hentschel U.: A symbiont phage protein aids in eukaryote immune evasion, Gordon Research Conference: Animal-Microbe-Symbioses, Mount Snow, VT, USA, 2019

Talk: Jahn M.T., Arkhipova K., Markert S. M., Stigloher C., Lachnit T., Rix L., Pita L., Kupczok A., Ribes M., Dutilh B.E. , Hentschel U.: Exploring viral dark matter in marine sponges, ISME17- 17th International Symposium on Microbial Ecology. Leipzig, Germany, 2018

Poster: Jahn M.T., Taravat A., Markert S. M., Stigloher C., Moitinho-Silva L., Baldassarre L., Fraune S., Hentschel U.: Investigating spatial relationships of host-associated microbes using correlative light and electron microscopy, Gordon Research Conference: Animal-Microbe-Symbioses, Mount Snow, VT, USA, 2017

Talk: Jahn, M.T., Markert S. M., Ryu T., Ravasi T., Stigloher C., Hentschel U., Moitinho-Silva L.: Investigating environmental bacteria by high resolution microscopy and transcriptional profiling: A case study with Poribacteria, Microbiology and Infection. Würzburg, Germany, 2017

Poster: Jahn, M.T., Markert S.M., Stigloher C., Hentschel U., Moitinho-Silva, L.: Shedding Light on the Candidate Phylum Poribacteria by Fluorescence in situ Hybridization Correlative Light and Electron Microscopy (FISH-CLEM), EMBL-Conference: From 3D Light to 3D Electron Microscopy. Heidelberg, Germany, 2016

Talk: Jahn, M.T., Moitinho-Silva, L., Markert M.M., Stigloher C., Hentschel U.: Transcriptional profiling provides evidence for cell compartmentation in poribacterial sponge symbionts, 2nd Planctomycetes-Verrucomicrobia-Chlamydiae Superphylum: New model organisms, Sevilla, Spain, 2015