Acknowledgements
We thank Ryota Aoyagi, Keito Kobayashi, Susan Cordell, Elizabeth Stacy,
Rebecca Ostertag, Amanda Uowolo, Tomoko Sakishima, Gary Sur, and Joshua
Nagle for their supports on our fieldwork. We also thank the Department
of Land and Natural Resources (DOFAW) for permission to take plant
samples. This study was partly supported by grants from JSPS KAKENHI
#JP17J04193 to GA and #15KK0255 to YO, The Kyoto University Foundation
to GA, and Internship Subsidy from CoHHO (the Connectivity of Hills,
Humans, and Oceans) Educational Program to GA.