STRUKTUR DAN KOMPOSISI VEGETASI HABITAT BEKANTAN (Nasalis larvatus Wurmb. ) PADA HUTAN MANGROVE DI BAGIAN HILIR SUNGAI WAIN KALIMANTAN TIMUR

Abstract

ABSTRACT Structure and vegetation composition of proboscis monkey’s habitat in mangrove forest at down stream of Wain River, East Kalimantan shows that in general the forest condition is heavily disturbed, which is indicated by a very low canopy, low forest density and the ground is covered by dense shrubs, lianas and other undergrowth plants. The vegetation composition consists of 22 species of trees and shrubs which belong to 20 genera and 18 families, and 18 species of undergrowth plants such as herbs, lianas, ferns, palms and pandanus. Based on the important value index (IVI) it was recognized that at the forest stage dominated by Heritiera littoralis Aiton, the sapling stage is also dominated by Heritiera littoralis Aiton which is associated with Pouteria obovata (R.Br.) Baehni and the seedling stage is dominated by Dillenia suffruticosa (Griff.) Mart.), Sonneratia caseolaris (L) Engl. is one of tree species that produce food for proboscis monkey in the area beside a fern species of Acrostichum aureum Linn.