1. Tropical Plant and Soil Sciences, College of Tropical Agriculture and Human Resources, University of Hawai‘i at Mānoa, 3190 Maile Way, St. John 102, Honolulu, HI 96822, USA.
2. Geography and Environment, College of Social Sciences, University of Hawai‘i at Mānoa, 2424 Maile Way, Saunders 435, Honolulu, HI 96822, USA.