Sains Malaysiana 42(10)(2013): 1409–1424
Tree Species Composition and Diversity in One Ha
Forest, Ulu Muda Forest
Reserve, Kedah
(Komposisi Spesies Pokok dan Kepelbagaian dalam Satu Ha Hutan, Hutan Simpan Ulu Muda, Kedah)
M.N. Mardan, K.R. Hakeem, I. Faridah-Hanum*
& N.S. Saari
Faculty of Forestry, Universiti Putra Malaysia, 43400 Serdang,
Selangor, Malaysia
Received: 10 March 2013/Accepted:
12 May 2013
ABSTRACT
The present study was carried out to
investigate the composition of species and species diversity at Compartment 28A
in the Ulu Muda Forest
Reserve (UMFR), located in north-west of Peninsular Malaysia. The
area covered was one ha. Stems with diameter at breast height (dbh)as ≥
1 cm were enumerated, identified and their height measured. The importance
value index (IVI) was estimated to show which species have the highest
value, since species density was also estimated. We recorded 722 species from
81 genera belonging to 42 families. The highest IVI was
recorded for Macaranga hosei (42.40). It was also the highest in stand density
(33 individuals / 4.43 %) in one ha. Species from Euphorbiaceae were represented at the highest level, with 11 genera (about 210 individuals).
The total above-ground biomass (TAGB) in one ha using three
different modifications from Kato et al. (190.3 t/ha), Kueh and Lim (2522.8 t/ha), and Lim (174.7 t/ha) were noted from family Dipterocarpaceae.
Keywords: Importance value index;
species composition; species diversity; stand density; Ulu Muda Forest Reserve
ABSTRAK
Penyelidikan ini telah dijalankan untuk mengkaji komposisi spesies dan kepelbagaian spesies di Kompartmen 28A,
di Hutan Simpan Ulu Muda (UMFR), terletak di barat laut Semenanjung Malaysia. Kawasan yang dikaji ialah satu ha. Batang berdiameter pada paras dada (dbh) pada ≥ 1 cm telah dikira, dicam dan ketinggiannya diukur. Indeks Nilai Kepentingan (IVI) telah dianggarkan untuk menunjukkan spesies yang mempunyai nilai tertinggi, kerana kepadatan spesies turut dianggarkan. Data merekodkan 722 spesies daripada 81 genus tergolong kepada 42 famili. IVI tertinggi telah direkodkan untukMacaranga hosei (42.40). Ia juga tertinggi bagi kepadatan dirian (33 individu/ 4.43%) dalam satu hektar. Spesies daripada Euphorbiaceae diwakili paling tinggi dengan 11 genus (210 individu). Jumlah biojisim atas tanah dengan menggunakan ubahsuaian yang berbeza kepada Kato et al. (190.3 t/ha), Kueh dan Lim (2522.8 t/ha) dan Lim (174.7 t/ha) telah didapati bagi Dipterocarpaceae.
Kata kunci: Hutan Simpan Ulu Muda; indeks nilai kepentingan; kepadatan dirian; kepelbagaian spesies; komposisi spesies
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*Corresponding author; email: i.faridahhanum@gmail.com
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