1. Shikoku Research Center, Forestry and Forest Products Research Institute Kochi Japan
2. Fenner School of Environment and Society, The Australian National University Canberra Australian Capital Territory Australia
3. Department of Forest Vegetation Forestry and Forest Products Research Institute Tsukuba Japan
4. Graduate School of Agriculture, Hokkaido University Sapporo Japan
5. Forestry Research Institute, Hokkaido Research Organization Bibai Japan
6. U.S. Geological Survey Eastern Ecological Science Center Laurel Maryland USA