he opponent is Dr. Michael Danger from The Interdisciplinary Laboratory for Continental Environments, University of Lorraine, and the custos is Professor Annikki Mäkelä from Department of Forest Sciences, University of Helsinki. The defence will take place in Porthania, Auditorium P674, Yliopistonkatu 3, in the city centre. The opponent will be participating through a remote connection, and it will be possible to follow the defence either at the location, or remotely at https://helsinki.zoom.us/j/67732427195?pwd=K1NaZE03bE8wM3YrY0dWRnZvQ3lVZz09 . The maximum amount of audience is limited to 75 persons with safety distances.