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Thomas Ranius

Thomas Ranius


I am a professor and leader for the Subject Area Conservation Biology (Dept. of Ecology, Faculty of Forest Sciences).

My research aims at contributing to the knowledge needed to make decisions related to biodiversity. The applied research is mainly about the effect on biodiversity and ecosystem services (especially recreational values) of forestry, nature conservation, and climate change. I also conduct research in spatial ecology focusing on species of conservation interest, especially beetles associated with old trees and dead wood. It aims at generating knowledge needed as input to the applied research. The research consists of empirical studies, simulations, and syntheses.


I am leading a course - Forest ecology and production potential. This is a course within the BSc programme Forest Business Management.

Previously, I have been the leader for the courses Forest conservation biology and Conservation Biology.


I am currently the leader of five research projects.

- Conservation value of low-productivity forests

- Direct and indirect effects of climate change: consequences on biodiversity conservation strategies and policy

- Consequences of dispersed and concentrated conservation efforts for biodiversity and ecosystem services

- Recreational values of landscapes: which and where are they, and how do they correlate with biodiversity values?

- Effects of climate on dead wood organisms – consequences on nature conservation and forest protection



Professor in conservation biology at Swedish University of Agricultural Sciences (2018)

Professor in ecology at Swedish University of Agricultural Sciences (2012)

Associated professor in ecology at Swedish University of Agricultural Sciences (2004)

Ph D in zoology at Lund university (2000)


As main supervisor for Ph D student

Ongoing: Carl Lehto, Anika Gossmann

Finished: Victor Johansson (2012), Diana Rubene (2014), Francesca Santaniello (2017)

As co-supervisor for Ph D students

Ongoing: Ellinor Ramberg, Andreas Lundgren

Finished: Stefano Chiari, Alejandro Ruete, Maria Koch-Widerberg, Måns Svensson, Simon Kärvemo

As host for post docs:

Ongoing: Julia Kyaschenko, Ly Lindman, Malin Tälle

Finished: Heidi Paltto, Alexandro Caruso, Martin Hallinger, Laia Mestre, Fabien Laroche, Matthew Hiron, Victor Johansson, Anna Filyushkina, Lina Widenfalk, Kadri Runnel, Aino Hämäläinen, Sonia Merinero

Selected publications

Kärvemo, S., Schroeder, M., Ranius, T. (2023) Beetle diversity in dead wood is lower in non-native than native tree species, especially those more distanttly related to native species. Journal of Applied Ecology 60: 170-180.

Ranius, T., Widenfalk, L.A., Seedre, M., Lindman, L., Felton, A., Hämäläinen, A, Filyushkina, A., Öckinger, E. (2023) Protected area designation and management in a world of climate change: A review of recommendations. Ambio 52: 68-80.

Kyaschenko, J., Strengbom, J., Felton, A., Aakala, T., Staland, H., Ranius, T. (2022) Increase in dead wood, large living trees and tree diversity, yet decrease in understory vegetation cover: The effect of three decades of biodiversity-oriented forest policy in Swedish forests. Journal of Environmental Management 313: 114993.

Blischarska, M. Hedblom, M., Josefsson, J., Widenfalk, O., Ranius, T., Öckinger, E., Widenfalk, L.A. (2022) Operationalisation of ecological compensation – obstacles and ways forward. Journal of Environmental Management 304: 114277.

Josefsson, J., Ahlbäck Widenfalk, L., Blicharska, M., Hedblom, M., Pärt, T., Ranius, T., Öckinger, E. (2021) Compensating for lost nature values through biodiversity offsetting – What is the evidence? Biological Conservation 257: 109117.

Lindman, L., ... Ranius, T. (2020) Metapopulation dynamics over 25 years of a beetle, Osmoderma eremita, inhabiting hollow oaksOecologia 194: 771-780.

Felton, A., ... Ranius, T. (2020). Keeping pace with forestry: Multi-scale conservation in a changing production forest matrix. Ambio 49: 1050-1064.

Hämäläinen, A., Strengbom, J., Ranius, T. (2020) Low-productivity boreal forests have high conservation value for lichens. Journal of Applied Ecology 57: 43-54.

Leverkus, A.B., Gustafsson, L., Lindenmayer, D.B., ... Ranius, T., Thorn, S. (2020) Salvage logging effects of regulating ecosystem services and fuel loads. Frontiers in Ecology and the Environment 18: 391-400.

Ranius, T., Hämäläinen, A., Sjögren, J., Hiron, M., Jonason, D., Kubart, A., Schroeder, M., Dahlberg, A., Thor, G., Jonsell, M. (2019). The evolutionary species pool concept does not explain occurrence patterns of dead-wood-dependent organisms: implications for logging residue extraction. Oecologia 191: 241-252.

Mestre, L. Jansson, N., Ranius, T. (2018) Saproxylic biodiversity and decomposition rate decrease with small-scale isolation of tree hollows. Biological Conservation 227: 226-232.

Ranius, T., Hämäläinen, A., Egnell, G., Olsson, B., Eklöf, K., Stendahl, J., Rudolphi, J., Sténs, A., Felson, A. (2018) The effects of logging residue extraction for energy on ecosystem services and biodiversity: A synthesis. Journal of Environmental Management 209: 409-425.



Professor at the Department of Ecology; S, Conservation Biology Unit
Telephone: +4618672334
Postal address:
Inst för Ekologi, Box 7044
750 07 UPPSALA
Visiting address: Ulls Väg 16, Uppsala