Altitudinal analyses of dipterocarps of limestone vegetation in Sarawak

Julaihi Abdullah, . (2006) Altitudinal analyses of dipterocarps of limestone vegetation in Sarawak. In: 8th Round-Table Conference on Dipterocarps: Dipterocarps - Enhancing Capacities in Sustainable Development and Poverty Alleviation, 15-17 Nov 2005, Ho Chi Minh City (Vietnam).

The study on floristic composition total above ground biomass and species dominance of trees with d.b.h. ≥ 5 cm was conducted at 100 m intervals from 130 m to 1130 m a.s.l. at Gunung Api Gunung Mulu National Park Sarawak Malaysia. A total of 1103 trees with d.b.h. ≥ 5 cm were enumerated in an accumulative area of 1.04 ha belonging to 195 species from 108 genera and 45 families. The mean density of trees with d.b.h.≥ 5 cm is 940 trees ha-1 with a total above ground biomass of 264 ton ha-¹ basal area (BA) of 31.37 m2 ha-¹ and leaf area index (LAI) of 3.93 ha ha-¹. Within all studied plots Euphorbiaceae has the most number of trees recorded followed by Dipterocarpaceae and Myrtaceae. 12.51% of the trees are dipterocarps which are common from 130 m to 730 m a.s.l.. Hopea andersonii is the most dominant tree species with importance value (IV) of 20.49 relative density (Rd) of 5.17 relative frequency (Rf) of 4.28 and relative basal coverage (RD) of 11.05. Dipterocarps contributed 36.20% of TAGB 29.99% of BA and 27.66% of LAI. The endemic species of dipterocarps in limestone forest will be discussed. Results of the study show that limestone forest of Gunung Api is indeed very rich in species especially dipterocarps and many species are confined to limestone habitats. Conservation status of the limestone flora in general and dipterocaps species recorded will be presented. The result of the study will contribute to the conservation and sustainable management of the dipterocarps in Sarawak.

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Abstract

The study on floristic composition total above ground biomass and species dominance of trees with d.b.h. ≥ 5 cm was conducted at 100 m intervals from 130 m to 1130 m a.s.l. at Gunung Api Gunung Mulu National Park Sarawak Malaysia. A total of 1103 trees with d.b.h. ≥ 5 cm were enumerated in an accumulative area of 1.04 ha belonging to 195 species from 108 genera and 45 families. The mean density of trees with d.b.h.≥ 5 cm is 940 trees ha-1 with a total above ground biomass of 264 ton ha-¹ basal area (BA) of 31.37 m2 ha-¹ and leaf area index (LAI) of 3.93 ha ha-¹. Within all studied plots Euphorbiaceae has the most number of trees recorded followed by Dipterocarpaceae and Myrtaceae. 12.51% of the trees are dipterocarps which are common from 130 m to 730 m a.s.l.. Hopea andersonii is the most dominant tree species with importance value (IV) of 20.49 relative density (Rd) of 5.17 relative frequency (Rf) of 4.28 and relative basal coverage (RD) of 11.05. Dipterocarps contributed 36.20% of TAGB 29.99% of BA and 27.66% of LAI. The endemic species of dipterocarps in limestone forest will be discussed. Results of the study show that limestone forest of Gunung Api is indeed very rich in species especially dipterocarps and many species are confined to limestone habitats. Conservation status of the limestone flora in general and dipterocaps species recorded will be presented. The result of the study will contribute to the conservation and sustainable management of the dipterocarps in Sarawak.

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Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QK 495 D564R859 2005 (095003273) Call Number
AGROVOC Term:	Dipterocarps
AGROVOC Term:	Floristic composition
AGROVOC Term:	Limestone
AGROVOC Term:	Highlands
AGROVOC Term:	Altitude
AGROVOC Term:	Plant density
AGROVOC Term:	Species diversity
AGROVOC Term:	Dipterocarpaceae
AGROVOC Term:	Euphorbiaceae
AGROVOC Term:	Myrtaceae
Geographical Term:	MALAYSIA
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:52
URI:	http://webagris.upm.edu.my/id/eprint/7711

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