Affiliation: | 1. Forest Research, Northern Research Station, Roslin, Midlothian, Scotland EH25 9SY, United Kingdom;2. Forest & Landscape, University of Copenhagen, Rolighedsvej 23, DK-1958 Frederiksberg C, Copenhagen, Denmark;3. ALTERRA, Wageningen University and Research Centre, P.O. Box 47, 6700AA Wageningen, The Netherlands |