Coastal resources and systems of the Pacific basin : investigation and steps toward protective management

Abstract

Assessments of the general condition, stocking, composition, and growth of mangroves on the islands of Pohnpei and Yap and at one area on Kosrae were undertaken at the request of these states. Methods used included: reconnaissance on foot, by air and by boat; use of 1976 aerial photographs; remeasurement of forest inventory plots installed by the US Forest Service in 1983; and installation of new inventory plots, examination of public records, and reviews of published data (Pohnpei). Average annual increment of mangroves on all islands was 6.9 m3 per hectare per year; increments on individual plots ranged from 0.9-16.7 m3 per hectare per year. The wide variation in growth rates suggests that management could do much to boost productivity. Production appears adequate to meet present consumption except for a few specific locations and products. Problems affecting mangroves on these islands include uncontrolled exploitation, excessive sedimentation, and alteration of natural drainage. Actions to conserve mangroves are recommended.