28. Maldonado M, Bayer K, López-Acosta M (2024) Nitrogen and Phosphorus Cycling Through Marine Sponges: Physiology, Cytology, Genomics, and Ecological Implications. Frontiers in Invertebrate Physiology: A Collection of Reviews Apple Academic Press. eBook ISBN 9781003403319

27. Busch K, Marulanda-Gómez A, Morganti TM, Bayer K, and Pita L (2024) Sponge Symbiosis: Microbes Make an Essential Part of What It Means to Be a Sponge. Frontiers in Invertebrate Physiology: A Collection of Reviews Apple Academic Press, eBook ISBN 9781003403319

26. Marulanda-Gomez AM, Bayer K, Pita L and Hentschel U (2023). A novel in-vivo phagocytosis assay to gain cellular insights on sponge-microbe interactions. Front. Mar. Sci. 10:1176145. doi: 10.3389/fmars.2023.1176145

25. Maldonado M, López-Acosta M, Busch K, Slaby BM, Bayer K, Beazley L, Hentschel U, Kenchington E and Rapp HT (2021). A Microbial Nitrogen Engine Modulated by Bacteriosyncytia in Hexactinellid Sponges: Ecological Implications for Deep-Sea Communities. Front. Mar. Sci. | DOI: 10.3389/fmars.2021.638505

24. Busch K, Wurz E, Rapp HT, Bayer K,  Franke A, and Hentschel U (2020). Chloroflexi Dominate the Deep-Sea Golf Ball Sponges Craniella zetlandica and Craniella infrequens Throughout Different Life Stages. Front. Mar. Sci. 7:674. DOI: 10.3389/fmars.2020.00674.

23. Bayer K, Busch K, Kenchington E, Beazley L, Franzenburg S, Michels J, Hentschel U, Slaby BM (2020) Microbial Strategies for Survival in the Glass Sponge Vazella pourtalesii. mSystems 5 (4). e00473-20. DOI: 10.1128/mSystems.00473-20

22. Steinert G, Busch K, Bayer K, Kodami S, Arbizu PM, Kelly M, Mills S, Erpenbeck D, Dohrmann M, Wörheide G, Hentschel U, and PJ Schupp (2020) Compositional and quantitative insights into bacterial and archaeal communities of South Pacific deep-sea sponges (Demospongiae and Hexactinellida) Frontiers in Microbiology 11, 716 DOI: 10.3389/fmicb.2020.00716

21. Batani G, Bayer K, Böge J, Hentschel U, and T. Thomas (2019) Fluorescence in situ hybridization (FISH) and cell sorting of living bacteria. Scientific Reports 9, 18618  DOI: 10.1038/s41598-019-55049-2.

20. Slaby BM, Franke A, Rix L, Pita L, Bayer K, Jahn MT and Hentschel U.  (2019) Marine Sponge Holobionts in Health and Disease. In: Symbiotic Microbiomes of Coral Reefs Sponges and Corals., ed. by Li, Z.. Springer Netherlands, Dordrecht, Netherlands, pp. 81-104. ISBN 978-94-024-1610-7 DOI 10.1007/978-94-024-1612-1_7.

19. Bayer K, Jahn MT, Slaby BM, 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 (6). e00150-18. DOI 10.1128/mSystems.00150-18. .

18. Astudillo-Garcia C, Slaby BM, Waite DW, Bayer K, Hentschel U and Taylor MW (2017) Phylogeny and genomics of SAUL, an enigmatic bacterial lineage frequently associated with marine sponges. Environmental Microbiology. DOI: 10.1111/1462-2920.13965. 

17. Slaby BM, Hackl T, Horn H, Bayer K, and Hentschel U (2017) Metagenomic binning of a marine sponge microbiome reveals unity in defense but metabolic specialization. The ISME Journal DOI: org/10.1038/ismej.2017.10                     

16. Horn H, Slaby BM, Jahn MT, Bayer K, Moitinho-Silva L, Förster F, Abdelmohsen UR, and Hentschel U (2016) An Enrichment of CRISPR and Other Defense-Related Features in Marine Sponge-Associated Microbial Metagenomes. Frontiers in Microbiology 7:1751. DOI: 10.3389/fmicb.2016.01751

15. Bayer K, Slaby B and Hentschel U (2015) Den Unkultivierbaren auf der Spur. Jubiläumsheft 20 Jahre BIOspektrum 1/2015

14. Bayer K, Moitinho-Silva L, Brümmer F, Cannistraci CV, Ravasi T and Hentschel U (2014) GeoChip-based insights into the microbial functional gene repertoire of marine sponges (HMA, LMA) and seawater. FEMS Microbiology Ecology. 90: 832–843. DOI: 10.1111/1574-6941.12441

13. Bayer K, Kamke J and Hentschel U (2014) Quantification of bacterial and archaeal symbionts in high and low microbial abundance sponges using real-time PCR. FEMS Microbial Ecology 89:679–69. DOI: 10.1111/1574-6941.12369

12. Abdelmohsen UR, Bayer K and Hentschel U (2014) Diversity, abundance and natural products of marine sponge-associated actinomycetes. Natural Products Reports 31, 381-399. DOI: 10.1039/C3NP70111E

11. Moitinho-Silva L, Bayer K, Cannistraci CV, Giles EC, Ryu T, Seridi L, Ravasi T and Hentschel U (2014) Specificity and transcriptional activity of microbiota associated with low and high microbial abundance sponges from the Red Sea. Molecular Ecology. 23, 1348 - 1363. DOI: 10.1111/mec.12365

10. Kamke J, Bayer K, Woyke T, and Hentschel U (2012) Exploring symbioses by single-cell genomics. Biological Bulletin 223, 30 - 43. DOI: org/10.1086/BBLv223n1p30

9. Bayer K, Scheuermayer M, Fieseler L, and Hentschel U (2012) Genomic mining for novel FADH2-dependent halogenases in marine sponge-associated microbial consortia. Marine Biotechnology 15, 63 - 72. DOI: 10.1007/s10126-012-9455-2

8. Bayer K, and Hentschel U (2012) Einzelzell-Genomik: das Bakterium als Individuum. BIOspektrum 06/2012. 18, 596 - 598.

7. Pfannkuchen M, Fritz GB, Schlesinger S, Bayer K and Brümmer F (2009) In-situ pumping activity of the sponge Aplysina aerophoba, Nardo 1886. Journal of Experimental Marine Biology and Ecology 369, 65 - 71. DOI: org/10.1016/j.jembe.2008.10.027

6. Bayer K, Schmitt S, and Hentschel U (2008) Microbial nitrification in Mediterranean sponges: Possible involvement of ammonium-oxidizing Betaproteobacteria. Porifera Research Biodiversity, Innovation and Sustainability. Custódio MR, Lôbo-Hajdu G, Hajdu E, Muricy G, eds, Série Livros 28. Museu Nacional, Rio de Janeiro. 165 - 171.

5. Siegl A, Bayer K, Kozitska S, Hentschel U and Schmitt S (2008) Sponges and microbes - new frontiers in an ancient symbiosis. Vie et Milieu 58, 165 - 174.

4. Hoffmann F, Roy H, Bayer K, Hentschel U, Pfannkuchen M, Brümmer F, and de Beer D (2008) Oxygen dynamics and transport in the Mediterranean sponge Aplysina aerophoba. Marine Biology 153, 1257 - 1264. DOI: 10.1007/s00227-008-0905-3

3. Bayer K, Schmitt S, and Hentschel U (2008) Physiology, phylogeny and in-situ evidence for bacterial and archaeal nitrifiers in the marine sponge Aplysina aerophoba. Environmental Microbiology 10, 2942 - 2955. DOI: 10.1111/j.1462-2920.2008.01582.x

2. Bayer K, Siegl A, Schmitt S, Hoffmann F, and Hentschel U (2008) Unravelling microbial diversity and metabolism in marine sponges. Proceedings of the Leopoldina Symposium 'Life strategies of microorganisms in the environment and in host organisms' 96, 71 - 79.

1. Schmitt S, Wehrl M, Bayer K, Siegl A, and Hentschel U (2007) Marine sponges as models for commensal microbe-host interactions. Symbiosis J. 44, 43 - 50.

30. Bayer K und Hentschel U (2023) PoC - Point of Cooperation: Single Cell Sorting to support your research. (Poster) In: Annual PoF IV - Topic 6 Symposium. 22.-23.06.2023, Bremerhaven, Germany.

29. Marulanda A, Bayer K , Pita L und Hentschel U (2022) Development of a novel, quantitative in-vivo phagocytosis assay to unravel mechanisms of interaction in sponge-microbe symbiosis. (Poster) In: 11. International Sponge Symposium. 10.-14.10.2022, Leiden, The Netherlands.

28. Pita L, Busch K, Koutsouveli V, Bayer K, Jung S, Ribes M, Coma R und Hentschel U (2022) Simulated extreme summer warming conditions alter Aplysina aerophoba´s capacity to respond to microbial signals. (Vortrag) In: 11. International Sponge Symposium. 10.-14.10.2022, Leiden, The Netherlands.

27. Slaby BM, Bayer K, Busch K, Morganti T, Boetius A, Franzenburg S und Hentschel U (2022) The underappreciated role of chemoautotrophy in the Geodia parva holobiont. (Poster) In: 11. International Sponge Symposium. 10.-14.10.2022, Leiden, The Netherlands.

26. Bayer K, Jahn MT, Slaby BM, Moitinho-Silva L, Marinos G, Zimmermann J, Waschina S. Kaleta C, Hentschel U (2019) Marine sponges as Chloroflexi hot-spots: Genomic insights, high resolution visualization and metabolic modelling of an abundant and diverse symbiotic clade. Poster, BAGECO 15 - 15th Symposium on Bacterial Genetics and Ecology, Lisbon, Portugal

25. Schmittmann L, Busch K, Bayer K, Buchholz B, Pita L, Hentschel U (2019) The sponge model on the runway of symbiosis – aposymbiotic sponges offer great potential for in-vivo exterimentation. GRC Animal-Microbe Symbioses Gordon Research Conference, Mount Snow, USA

24. Marinos G, Zimmermann J, Waschina S, Bayer K, Jahn M, Slaby BM, Hentschel U, Kaltea C (2019) Searching for microbial cooperation in Aplysina aerophoba in-silico. Poster, Symposium on Computation Integration of Multi-Omics data, Kiel, Germany

23. Bayer K, Jahn MT, Slaby BM, Moitinho-Silva L, Hentschel U (2018) Marine sponges as Chloroflexi hot-spots: Genomic insights and high resolution visualization of an abundant and diverse symbiotic clade, ISME 17 - Innovations in Microbial Ecology, Leipzig, Germany

22. Marinos G, Zimmermann J, Waschina S, Bayer K, Jahn M, Slaby BM, Hentschel U, Kaltea C (2018) In silico modeling of metabolic microbial interactions in Aplysina aerophoba. Poster, MIMAS2-Symposium, Greifswald, Germany

21. Bayer K, Slaby BM, Jahn M, Moitinho-Silva L and Hentschel U (2017) Metagenomics and FISH - CLEM visualization of marine sponge-associated Chloroflexi. Talk, 10th World Sponge Conference, Galway, Ireland

20. Batani G, Moitinho-Silva L, Jahn MT, Bayer K, Hentschel U and Thomas T (2017) Visualization of eukaryotic-like-proteins as ring-like structures within bacteria-containing sponge cells. Poster and Speed talk, 10th World Sponge Conference, Galway, Ireland

19. Slaby BM, Hackl T, Horn H, Bayer K, Hentschel U (2017) Metagenomic binning of a marine sponge microbiome reveals unity in defense but metabolic specialization. Talk, 10th World Sponge Conference, Galway, Ireland

18. Slaby BM, Hackl T, Horn H, Bayer K, Hentschel U (2017) Metagenomic binning of a marine sponge microbiome reveals unity in defense but metabolic specialization. Talk, Young Investigator Research Day, Kiel, Germany

17. Slaby BM, Hackl T, Horn H, Bayer K, Hentschel U (2017) Metagenomic binning of a marine sponge microbiome reveals unity in defense but metabolic specialization. Poster, Gordon Research Conference Animal-Microbe Symbioses, West Dover, VT, USA

16. Bayer K, Moitinho-Silva L and Hentschel U (2016) Metagenomics and FISH - CLEM visualization of marine sponge-associated Chloroflexi. Poster, Annual Meeting of the “Vereinigung für Allgemeine und Angewandte Mikrobiologie” (VAAM) Würzburg

15. Bayer K, Moitinho-Silva L and Hentschel U (2016) Microbial abundances and metabolic functions of sponge microbiomes. Poster and speed talk, CIESM-Meeting, Kiel

14. Bayer K, Moitinho-Silva L and Hentschel U (2014) Microbial abundances and metabolic functions of sponge microbiomes. Poster and speed talk, 2^nd International Symposium on Sponge Microbiology (ISSM), Baltimore/ Maryland, USA

13. Kumala L, Hentschel U and Bayer K (2013) Investigations on abundance and activity of microbial sponge symbionts using quantitative real - time PCR. Talk, 9th World Sponge Conference, Fremantle, Australia

12. Moitinho-Silva L, Bayer K, Cannistraci CV, Giles E, Ryu EC, Seridi T, Ravasi T and Hentschel U (2013) Phylogenetic diversity and metatranscriptome profiles of marine sponge-associated microbial consortia. Poster, Gordon Research Conference: Applied & Environmental Microbiology, South Hadley/ Massachusetts, USA

11. Bayer K, Scheuermayer M, Fieseler L and Hentschel U (2012) Genomic mining for novel FADH₂-dependent halogenases in marine sponge-associated microbial consortia by metagenomics and single cell genomics. Poster, Annual Meeting of the “Vereinigung für Allgemeine und Angewandte Mikrobiologie (VAAM)“ Tübingen, honored with a poster prize

10. Bayer K and Hentschel U (2011) Nitrogen fluxes in the Mediterranean sponge Aplysina aerophoba and its symbiotic microbial consortia. Talk, Annual Meeting of the “Vereinigung für Allgemeine und Angewandte Mikrobiologie” (VAAM) Karlsruhe

9. Bayer K (2011) Nitrogen fluxes between sponges and their symbiotic microbial consortia. Poster, 1^st International Symposium on Sponge Microbiology (ISSM), Würzburg

8. Bayer K, Schmitt S and Hentschel U (2010) Nitrogen fluxes in A. aerophoba and its symbiotic microbial consortia. Talk, Meeting of the “VAAM-Fachgruppe - Symbiotic Interactions“, Würzburg

7. Bayer K, Schmitt S and Hentschel U (2009) Physiology, phylogeny and in-situ evidence for bacterial and archaeal nitrifiers in the marine sponge Aplysina aerophoba. Poster, 6^th Congress of the International Symbiosis Society (ISS), Madison/Wisconsin, USA

6. Bayer K, Schmitt S and Hentschel U (2008) Physiology, phylogeny and in-situ evidence for bacterial and archaeal nitrifiers in the marine sponge Aplysina aerophoba.  Poster, 12^th International Symposium on Microbial Ecology (ISME), Cairns, Australia

5. Bayer K, Schmitt S and Hentschel U (2008) Bacterial and archaeal nitrifiers in the marine sponge Aplysina aerophoba: physiology, phylogeny and in-situ evidence. Poster 12^th Congress of the International Union of Microbiological Societies (IUMS) Istanbul, Turkey

4. Bayer K, Schmitt S and Hentschel U (2007) From diversity to function: Microbial nitification in the Mediterranean sponge Aplysina aerophoba. Poster, Annual Meeting of the “Vereinigung für Allgemeine und Angewandte Mikrobiologie (VAAM)” Osnabrück

3. Hoffmann F, Roy H, Bayer K, Hentschel U, Pfannkuchen M, Brümmer F, DeBeer D and  Boetius A (2006) Microbial life in a fluctuating chemical environment – Oxygen dynamics in the Mediterranean sponge Aplysina aerophoba. Poster, 11^th International Symposium on Microbial Ecology (ISME), Vienna, Austria

2. Bayer K, Schmitt S and Hentschel U (2006) Microbial nitification in Aplysina aerophoba. Poster, 7^th International Sponge Symposium, Buzios, Brazil

1. Bayer K (2006) „From Bench to Bedside-Molecular Approaches for Novel Therapies“ PhD students meeting of Graduate School of Life Science, Würzburg