The distribution of Myrica faya Ait. in the state of Hawaii

Abstract

The objective of this study was to map the distribution and abundance of Mvrica faya (firetree) in the State of Hawai’i. Reconnaissance data were used to map 34,365 total hectares (85,912 acres) of infestation, categorized into three density classes, throughout the state. Infestations of 28,906 hectares (72,265 acres) occur on the island of Hawai’i 1908 hectares (4770 acres) on Maui, 1007 hectares (2518 acres) on Lana’i 174 hectares (435 acres) on O’ahu, and 2370 hectares (5925 acres) on Kaua’i. Distribution ranges in elevation from as low as 425 m (1400 feet) on Lana’i to as high as 1940 m (6400 feet) on the slopes of Haleakala on Maui. Mvrica faya occurs on recent, thin ash over pahoehoe lava as well as on deep, well developed silty clay loam soil. It is found in montane rain forest habitats and in dry scrub marginal to submontane seasonal forest. Examination of the distribution patterns of M. faya implies that this species has not yet reached the limits of its potential distribution in Hawai’i.