1. Graduate School of Human and Environmental Studies, Kyoto University , Kyoto, Japan
2. Kyoto Institute for Regional Prospects, Kyoto Prefectural University , Kyoto, Japan
3. Japan Wildlife Research Center , Tokyo, Japan
4. Kitanada-cho, Naruto , Tokushima, Japan
5. Kyoto Botanical Gardens , Kyoto, Japan
6. Graduate School of Agricultural Science, Tohoku University , Osaki, Japan
7. Tohoku Research Center, Forestry and Forest Products Research Institute , Morioka, Iwate, Japan
8. Graduate School of Agriculture, Kyoto University , Kyoto, Japan