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Dr. Hanna Isaksson
Postdoc
Department of Ecology
School of Biology/ Chemistry
University of Osnabrück
Barbarastrasse 13
49076 Osnabrück, Germany
Tel:
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Research interests
A defining trait of most multicellular organisms is the presence of a life cycle, which governs how they grow, reproduce, and persist over time. My research focuses on how such life cycles emerge and how they are maintained by evolution. I study the conditions that favor group formation, the mechanisms that enable groups to reproduce, and the interactions among cells that stabilize group structure. In my current work, I investigate the evolution of multi-species multicellularity, where distinct species collectively form a higher-level group. I address these questions using mathematical models and computational simulations, grounded in evolutionary experiments with co-cultured auxotrophic bacteria.
Education and Scientific Career
2025 Postdoctoral fellow, Department of Biology, Lund University, Sweden (current)
2025 Postdoctoral scholar, Max Planck Institute for Evolutionary Biology, Plön, Germany
2024-2025 Senior Lecturer in Mathematics, School of Science and Technology, Örebro University, Sweden
2024 Visiting lecturer, Department of Mathematics and Mathematical Statistics, Umeå University, Sweden
2019-2024 Ph.D. in Computational Science, Department of Mathematics and Mathematical Statistics, Umeå University, Sweden
2014-2029 Master of Science Engineering Physics, Luleå University of Technology, Sweden
2025 Postdoctoral scholar, Max Planck Institute for Evolutionary Biology, Plön, Germany
2024-2025 Senior Lecturer in Mathematics, School of Science and Technology, Örebro University, Sweden
2024 Visiting lecturer, Department of Mathematics and Mathematical Statistics, Umeå University, Sweden
2019-2024 Ph.D. in Computational Science, Department of Mathematics and Mathematical Statistics, Umeå University, Sweden
2014-2029 Master of Science Engineering Physics, Luleå University of Technology, Sweden
Publications
2025 Isaksson, Hanna and Lind, Peter A and Libby, Eric. Adaptive evolutionary trajectories in complexity:
Transitions between unicellularity and facultative differentiated multicellularity. Proceedings of the
National Academy of Sciences 122.4 (2025). https://doi.org/10.1073/pnas.2411692122
2024 Isaksson, Hanna. Adaptation during the early evolution of multicellularity: mathematical models reveal
the impact of unicellular history, environmental stress, and life cycles. Doctoral thesis Umeå University
(2024).
2024 Sam D. Cook, Laxmi S. Mishra, Hanna Isaksson, Isabella R. Straub, Miriam Abele, Sanatkumar
Mishrad, Christina Ludwig, Eric Libby and Christiane Funk. Overexpression of the plastidal
pseudo-protease AtFtsHi3 confers drought tolerance without penalizing growth. Physiologia Plantarum
176.3 (2024). https://doi.org/10.1111/ppl.14370
2023 Isaksson, Hanna, Åke Brännström, and Eric Libby. Minor variations in multicellular life cycles have
major effects on adaptation. PLoS Computational Biology 19.4 (2023).
https://doi.org/10.1371/journal.pcbi.1010698
2022 Andersson, Rebecka and Isaksson, Hanna and Libby, Eric. Multi-species multicellular life cycles. CRC
Press, The Evolution of Multicellularity 343–356 (2022).
2021 Hanna Isaksson, Peter L Conlin, Ben Kerr, William C Ratcliff, Eric Libby. The consequences of budding
versus binary fission on adaptation and aging in primitive multicellularity. Genes 12.5: 661 (2021).
https://doi.org/10.3390/genes12050661
Transitions between unicellularity and facultative differentiated multicellularity. Proceedings of the
National Academy of Sciences 122.4 (2025). https://doi.org/10.1073/pnas.2411692122
2024 Isaksson, Hanna. Adaptation during the early evolution of multicellularity: mathematical models reveal
the impact of unicellular history, environmental stress, and life cycles. Doctoral thesis Umeå University
(2024).
2024 Sam D. Cook, Laxmi S. Mishra, Hanna Isaksson, Isabella R. Straub, Miriam Abele, Sanatkumar
Mishrad, Christina Ludwig, Eric Libby and Christiane Funk. Overexpression of the plastidal
pseudo-protease AtFtsHi3 confers drought tolerance without penalizing growth. Physiologia Plantarum
176.3 (2024). https://doi.org/10.1111/ppl.14370
2023 Isaksson, Hanna, Åke Brännström, and Eric Libby. Minor variations in multicellular life cycles have
major effects on adaptation. PLoS Computational Biology 19.4 (2023).
https://doi.org/10.1371/journal.pcbi.1010698
2022 Andersson, Rebecka and Isaksson, Hanna and Libby, Eric. Multi-species multicellular life cycles. CRC
Press, The Evolution of Multicellularity 343–356 (2022).
2021 Hanna Isaksson, Peter L Conlin, Ben Kerr, William C Ratcliff, Eric Libby. The consequences of budding
versus binary fission on adaptation and aging in primitive multicellularity. Genes 12.5: 661 (2021).
https://doi.org/10.3390/genes12050661
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