**Acknowledgements**

This study was supported by a Grant-in-Aid for Scientific Research (Grant-in-Aid for Young Scientists [Start-up]) provided by the Ministry of Education, Science, Sports and Culture (MEXT KAKENHI Grant Number: 25884001). This work was also partially supported by the CIFOR-Japan project during JFY 2010–2012 (Task manager: Dr. Ken Sugimura, FFPRI) with grant assistance provided to CIFOR by the Ministry of Foreign Affairs, Japan, and the Forestry and Forest Products Research Institute, Japan (FFPRI), and facilitated by the Collaborative Land Use Planning and Sustainable Institutional Arrangement (CoLUPSIA) Project funded by the EU. I thank these institutions for their assistance and support.
