1. Faculty of Forest Sciences, Department of Forest Ecology and Management, Swedish University of Agricultural Sciences SLU, Umeå, Sweden
2. School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
3. Faculty of Forest Sciences and Forest Ecology, Forest Inventory and Remote Sensing, University of Göttingen, Göttingen, Germany
4. Natural Resources Institute Finland (Luke), Bioeconomy and Environment Unit, Helsinki, Finland