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Dittmar Hahn, Ph.D.

Dittmar Hahn, Ph.D

Dittmar Hahn, Ph.D.

Department Chair, Regents' Professor
Curriculum Vitae (PDF)

Ph.D., 1989, Wageningen Agricultural University
Diploma, 1985, University of Hamburg



Microbial Ecology (BIO 4446)
Molecular Techniques in Microbial Ecology (BIO 7360G)
Aquatic Microbial Ecology (BIO 7410)

Research Interests

I am a microbial ecologist using molecular techniques to study uncultured microorganisms in aquatic and terrestrial environments. During the last years, I have mainly addressed questions on the ecology of nitrogen-fixing actinomycetes of the genus Frankia and their host plants, but was also involved in studies on invertebrate-microorganism interactions, the ecophysiology of uncultured purple sulfur and sulfate-reducing bacteria, the role of microorganisms in bioremediation of organic and inorganic contaminants, or the fate of pathogens in the environment.

Selected Publications

Samant, S., Dawson, J.O., Hahn, D. 2016. Growth responses of introduced Frankia strains to edaphic factors. Plant Soil 400, 123-132

Samant, S., Huo, T., Dawson, J.O., Hahn, D. 2016. Abundance and relative distribution of Frankia host infection groups under actinorhizal Alnus glutinosa and non-actinorhizal Betula nigra trees. Microb. Ecol. 71, 473-481.

Hussain, K., Hameed, S., Shahid, M., Ali, A., Iqbal, J., Hahn, D. 2015. First report of Providentia vermicola strains characterized for enhanced rapeseed growth attributing parameters. Int. J. Agricult. Biol. 17, 1110-1116.

Samant, S., Dawson, J.O., Hahn, D. 2015. Growth responses of indigenous Frankia populations to edaphic factors in actinorhizal rhizospheres. System. Appl. Microbiol. 38, 501-505.

Villamizar Gomez, A., Farr, W., Hahn, D., Dixon, J.R., Lazcano, D., Forstner, M.R.J. 2015. Absence of Batrachochytrium dendrobatidis in eighteen species of amphibians from a variety of habitats in Taumalipas, Mexico. Herpetol. Rev. 46, 34-37.

Samant, S., Amann, R.I., Hahn, D. 2014. Evaluation of the 23S rRNA gene as target for qPCR based quantification of Frankia in soils. System. Appl. Microbiol. 37, 229-234

Sha, Q., Vattem, D.A., Forstner, M.R.J., Hahn, D. 2013. Quantifying Salmonella population dynamics in water and biofilms. Microb. Ecol. 65, 60-67

Lee, H.-I., Donati, A.J., Hahn, D., Tisa, L.S., Chang, W.-S. 2013. Alteration of the exopolysaccharide production and the transcriptional profile of free-living Frankia strain CcI3 under nitrogen-fixing conditions. Appl. Microbiol. Biotechnol. 97, 10499-10509

Sha, Q., Forstner, M.R.J., Hahn, D. 2013. Diversity of Salmonella in biofilms and water in a headwater ecosystem. FEMS Microbiol. Ecol. 83, 642-649

Lindsay, M.K., Zhang, Y., Forstner, M.R.J., Hahn, D. 2013. Effects of the freshwater turtle Trachemys scripta elegans on ecosystem functioning: an approach in experimental ponds. Amphibia-Reptilia 34, 75-84

Sha, Q., Forstner, M.R.J., Bonner, T., Hahn, D. 2013. Salmonellae in fish feces analyzed by in situ hybridization and quantitative polymerase chain reaction. J. Aquatic Animal Health 25, 184-190

Please see faculty member’s CV or website for a complete list of publications and additional information.