Recovery Plan for 'Caesalpinia kavaiensis' and 'Kokia drynarioides'.

摘要

Kokia drynarioides is federally listed as endangered. Only four wild individuals are known from the North Kona district of Hawaii island. Caesalpinia kavajensis is also federally listed as endangered. Its population consists of approximately 30 individuals in three subpopulations in North Kona, 11 individuals in three subpopulations on Oahu, one mature tree on Kauai and a single individual on Lanai. K. drynarioides is not reproducing in the wild, and only limited reproduction of C. kavaiensis is occurring. The major habitat of both species is the native dry forests of the North Kona District, island of Hawaii. They occur on rough lava with a thin, highly drained soil layer between 60 and 900 meters (200 and 2,950 feet) elevation. Major threats to both species in this area are competition with seedlings of and increased fire danger caused by fountain grass (Pennisetum setaceum), and the grazing of introduced ungulates. C. kavaiensis also occurs in similar dry forest habitat on Oahu, Kauai and Lanai where it is threatened by competition from alien plants and the grazing and rooting of feral ungulates.