Personal profile
Current research
I am microbial ecologist with a current focus on Plant-microbe interactions and soil microbiology.
My current research activities are:
- Biological Nitrification Inhibition (BNI) and side effects on the soil microbial communities.
Research questions: How do BNI crops affect the soil and soil microbial communities? Are there any long term effects on succeeding crops grown in the soil? Could this have impact on human, environmental or soil health?
The reserach are carried out with in the CropSustaiN project.
Long term research questions:
- How do microbial communities assemble on plant roots?
- What are the role of seed bacteria during germination?
- Can we predict the rhizosphere microbiome based on soil history?
- How important is the rhizosphere microbiome for prediction of yield?
- How can we manage the soil to engineer the plant microbiome?
- How can we use microorganisms to improve soil health?
In addition, I am interested in cultivation of hitherto uncultivated bacterial taxa, in particular from the soil.
I use a range of techniques, but my primary expertise is the use of amplicon and shotgun metagenomics sequencing, bioinformatics, and machine learning.
I have ongoing work with data scientists, mathematicians and soil scientists to include deep/machine learning in the analyses, develop new statistical tests and apply zymography in combination with molecular analyses.
In a previous project, INTERACT, we developed a synthetic community from wheat rhizosphere allowing us to study plant-microbe interactions in a low-complexity manner.
If you are interested in working within these areas in a bachelor’s or master’s project, feel free to send me an e-mail.
CV
Positions
2023- present Assistant Professor, Section for Microbial Ecology and Biotechnology (UCPH)
2023-2025 Visiting researcher, Bioresources Unit, Austrian Institute of Technology AIT, Austria
2019-2023 Post-doc, Section for Microbial Ecology and Biotechnology, University of Copenhagen
Education
2016-2019 PhD Microbiology, University of Copenhagen (Denmark)
2011-2013 MSc Environmental Chemistry and Health, University of Copenhagen (Denmark)
2007-2011 BSc Environmental Chemistry, University of Copenhagen (Denmark)
Teaching activites
(2026) Microbiology (BSc course), (2025) Soil and Water Pollution experimental part (MSc), (2025) Soil and Water Pollution Theory (MSc), (2025) Advanced Microbiol Biotechnology (MSc),
(2016-2023) Applied Microbiology (MSc Course), (2021) Project in Experimental Molecular Biology,
Supervision
Co-supervisor of 2 PhD students. 1 MSc thesis, 4 Erasmus MSc internships students, 2 projects outside course scope (PUK)
Other activities
2024-2025 Editor BMC Microbiology
2019-2022 Appointed Post-doc member of the Department Research Committee.
2019-2022 Member of Post-doc association in the Department.
Awards
Article of the year 2019 FEMS Microbiology Ecology
Education/Academic qualification
PhD, Microbial Ecology, Microbiota in preferential flow paths: Composition and lifestyles of microbial communities in an understudied subsurface environment, University of Copenhagen
Award Date: 3 Jun 2019
Environmental Chemistry and Health, MSc, The effect of viscosin biosurfactant on n-hexadecane degradation by a bacterial consortium
Award Date: 22 Oct 2013
Keywords
- Faculty of Science
- Agricultural microbiology
- soil microbiology
- environmental microbial communities
- Metagenomics
- amplicon sequencng
Collaborations and top research areas from the last five years
-
Synthetic bacterial community colonizes wheat roots grown in soil and mimics the assembly pattern of a field community in a cultivar dependent manner
Bak, F., Meier, J. K., Markussen, B., Molina-Zamudio, K. Y., Tang, C. & Nicolaisen, M. H., 2026, In: ISME communications. 6, 1, 12 p., ycag028.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile5 Downloads (Pure) -
A roadmap for equitable reuse of public microbiome data
The Data Reuse Consortium, Oct 2025, In: Nature Microbiology. 10, 10, p. 2384-2395 12 p.Research output: Contribution to journal › Review › peer-review
Open Access7 Citations (Scopus) -
Meloidogyne incognita parasitism is affected by Pseudomonas protegens CHA0 and its effects on tomato-associated microbiota
Topalović, O., Kudjordjie, E. N., Sheikh, S., Kenou, G. B., Bak, F., Ekelund, F. & Vestergård, M., 2025, In: Environmental Microbiome. 20, 12 p., 79.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile2 Citations (Scopus)6 Downloads (Pure) -
NRPS gene dynamics in the wheat rhizoplane show increased proportion of viscosin NRPS genes of importance for root colonization during drought
Guan, Y., Berne, E., Hennessy, R. C., Garbeva, P., Nicolaisen, M. H. & Bak, F., 2025, In: mSphere. 10, 10, 19 p., e00852-24.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus)6 Downloads (Pure) -
Pseudomonas taxonomic and functional microdiversity in the wheat rhizosphere is cultivar-dependent and links to disease resistance profile and root diameter
Herms, C. H., Hennessy, R. C., Bak, F., Guan, Y., Browne, P. D., Nielsen, T. K., Hansen, L. H., Dresbøll, D. B. & Nicolaisen, M. H., 2025, In: Applied Soil Ecology. 211, 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile5 Citations (Scopus)16 Downloads (Pure) -
STREAMS guidelines: standards for technical reporting in environmental and host-associated microbiome studies
Kelliher, J. M., Mirzayi, C., Bordenstein, S. R., Oliver, A., Kellogg, C. A., Hatcher, E. L., Berg, M., Baldrian, P., Aljumaah, M., Miller, C. M. L., Mungall, C., Novak, V., Palucki, A., Smith, E., Tabassum, N., Bonito, G., Brister, J. R., Chain, P. S. G., Chen, M. & Degregori, S. & 31 others, , 2025, In: Nature Microbiology. 10, 12, p. 3059-3068Research output: Contribution to journal › Journal article › Research › peer-review
1 Citation (Scopus) -
Fulvic Acid Enhances Nitrogen Fixation and Retention in Paddy Soils through Microbial-Coupled Carbon and Nitrogen Cycling
Xue, S., Yi, X., Peng, J., Bak, F., Zhang, L., Duan, G., Liesack, W. & Zhu, Y., 2024, In: Environmental Science and Technology. 58, 42, p. 18777-18787 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
File26 Citations (Scopus)5 Downloads (Pure) -
Linking microbial community structure with function using amplicon sequencing of NRPS genes associated with wheat roots under drought stress
Guan, Y., Berne, E., Hennessy, R. C., Garbeva, P., Nicolaisen, M. H. & Bak, F., 2024Research output: Other contribution › Research