Univ.-Prof. Dr. Holger Daims

 

 

 

 

 

Deputy Head of the Department of Microbiology and Ecosystem Science
Deputy Head of the Division of Microbial Ecology

☎ +43 1 4277 91204

✉ holger.daims@univie.ac.at

Our research focuses on microorganisms driving the biogeochemical nitrogen cycle, with particular emphasis on key players in the nitrification process: nitrite-oxidizing bacteria (NOB) and complete ammonia oxidizers (comammox). Employing various molecular, 'omics', and microbial physiology techniques, we identify new nitrifying microbes and investigate the metabolism, ecophysiology, and evolution of these elusive organisms. Our objective is to gain a fundamental biological understanding of nitrification in natural and engineered ecosystems, which could also improve management practices in agriculture and wastewater treatment, and mitigate greenhouse gas (nitrous oxide) emissions.

Another area of interest are microbe-microbe interactions within complex microbiomes, such as biofilms in engineered and natural environments. Integrating 'omics', fluorescence and chemical imaging, and computational approaches, we pinpoint microbial partners and uncover their in situ interactions. Our aim is to reveal core principles of microbial interactions that govern the composition, spatial structuring, and functional adaptability of microbial communities.

Research Topics

Join the Team

If you are interested in joining our team, explore our open positions and learn more about available PhD and postdoc stipends here.

Teaching

To view Holger Daims' teaching activities at the University of Vienna, visit u:find.

Group Members

 Publications

Showing entries 85 - 90 out of 118
Daims, H. (2009). Quantitative FISH for the cultivation-independent quantification of microbes in wastewater treatment plants. In P. H. Nielsen, H. Daims, & H. Lemmer (Eds.), FISH Handbook for Biological Wastewater Treatment: Identification and quantification of microorganisms in activated sludge and biofilms by FISH (pp. 85-92). IWA Publishing.
Daims, H., Maixner, F., & Schmid, M. C. (2009). The nitrifying microbes: Ammonia oxidizers, nitrite oxidizers, and anaerobic ammonium oxidizers. In P. H. Nielsen, H. Daims, & H. Lemmer (Eds.), FISH Handbook for Biological Wastewater Treatment: Identification and quantification of microorganisms in activated sludge and biofilms by FISH (pp. 9-17). IWA Publishing.
Daims, H. (2009). Use of fluorescence in situ hybridization and the daime image analysis program for the cultivation-independent quantification of microorganisms in environmental and medical samples. Cold Spring Harbor Protocols, 7.
Hatzenpichler, R., Lebedeva, E. V., Spieck, E., Stöcker, K., Richter, A., Daims, H., & Wagner, M. (2008). A moderately thermophilic ammonia-oxidizing crenarchaeote from a hot spring. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 105(6), 2134-2139.
Maixner, F., Wagner, M., Lücker, S., Pelletier, E., Schmitz-Esser, S., Hace, K., Spieck, E., Konrat, R., Le Paslier, D. L., & Daims, H. (2008). Environmental genomics reveals a functional chlorite dismutase in the nitrite-oxidizing bacterium "Candidatus Nitrospira defluvii". Environmental Microbiology, 10, 3043-3056.
Biasi, C., Meyer, H., Rusalimova, O., Hämmerle, R., Kaiser, C., Baranyi, C., Daims, H., Lashchinsky, N., Barsukov, P., & Richter, A. (2008). Initial effects of experimental warming on carbon exchange rates, plant growth and microbial dynamics of a lichen-rich dwarf shrub tundra in Siberia. Plant and Soil: international journal on plant-soil relationships, 307(1-2), 191-205. https://doi.org/10.1007/s11104-008-9596-2