Research Interests

I have a degree in biology and have been working in science since 2009.

My research projects are mostly interdisciplinary.

Topics have been the microbial component of greenhouse gas release from peatlands and seed survival in the biogas process chain.

Peer-reviewed Publications


Hahn, J., Westerman, P. R., Gerowitt, B., and Heiermann, M. (2023). Mesophilic, Anaerobic Digestion in a Full-Scale, Commercial Biogas Reactor Kills Seeds More Efficiently than Lab-Scale Systems. Fermentation 9, 1–19. doi: 10.3390/fermentation9050481.


Hahn, J., Westerman, P. R., Mol, F. de, Heiermann, M., and Gerowitt, B. (2022). Viability of Wildflower Seeds After Mesophilic Anaerobic Digestion in Lab-Scale Biogas Reactors. Front. Plant Sci. 13. doi: 10.3389/fpls.2022.942346.


Hahn, J., Mol, F. de, and Müller, J. (2021). Ensiling Reduces Seed Viability: Implications for Weed Management. Front. Agron. 3, 1–13. doi: 10.3389/fagro.2021.708851


Müller, J., and Hahn, J. (2020). Ensilability of Biomass from Effloresced Flower Strips as Co-substrate in Bioenergy Production. Front. Bioeng. Biotechnol. 8, 1. doi: 10.3389/fbioe.2020.00014


Hahn, J., Juottonen, H., Fritze, H., and Tuittila, E.-S. (2018). Dung application increases CH4 production potential and alters the composition and abundance of methanogen community in restored peatland soils from Europe. Biol. Fertil. Soils 54, 533–547. doi: 10.1007/s00374-018-1279-4

Hahn, J., Parzych, D., Schulz, J., Westerman, P. R., and Gerowitt, B. (2018). Wildpflanzen-Samen in der Biogasanlage: Screening des Überlebensriskos verschiedener Arten. Julius-Kühn-Archiv, 41–46. doi: 10.5073/jka.2018.458.006


Koch, M., Koebsch, F., Hahn, J., and Jurasinski, G. (2017). From Meadow to shallow lake: Monitoring secondary succession in a coastal fen after rewetting by flooding based on aerial imagery and plot data. Mires and Peat 19, 1–17. doi: 10.19189/MaP.2015.OMB.188


Hahn, J., Parzych, D., Westerman, P. R., Heiermann, M., and Gerowitt, B. (2016). Die Bedeutung der Temperatur für die Inaktivierung von Samen im Biogas-Reaktor. Julius-Kühn-Archiv, 123–129. doi: 10.5073/jka.2016.452.017


Hahn, J., Köhler, S., Glatzel, S., and Jurasinski, G. (2015). Methane Exchange in a Coastal Fen in the First Year after Flooding – A Systems Shift. PLoS ONE 10, e0140657. doi: 10.1371/journal.pone.0140657

Hahn, J., Westerman, P. R., Heiermann, M., and Gerowitt, B. (2015). Survival of seeds from wild-flowering mixtures in the mesophilic, anaerobic digestion of the biogas process. Aspects of Applied Biology 131, 187–192.


Baum, C., Eckhardt, K.-U., Hahn, J., Weih, M., Dimitriou, I., Leinweber, P., et al. (2013). Impact of poplar on soil organic matter quality and microbial communities in arable soils. Plant, Soil and Environment 59, 95–100. doi: 10.17221/548/2012-pse


Glatzel, S., Koebsch, F., Beetz, S., Hahn, J., Richter, P., and Jurasinski, G. (2011). Maßnahmen zur Minderung der Treibhausgasfreisetzung aus Mooren im Mittleren Mecklenburg. Telma, 85–106.


Lasak, S., Hahn, J., Jurasinski, G., Köhler, S., and Glatzel, S. (2010). “Methanfreisetzungen im Rahmen des Auftauens eines überfluteten Küstenmoors,” in Aktuelle Probleme im Wasserhaushalt von Nordostdeutschland : Trends, Ursachen, Lösungen, eds. K. Kaiser, J. Libra, B. Merz, O. Bens, and R. F. Hüttl (Potsdam), 129–130.