Natural forest dynamics: I. Homogenity of species distribution

Wan Mohd Shukri Wan Ahmad, . and Wan Razali Wan Mohd, . and Ashari Mukhtar, . Natural forest dynamics: I. Homogenity of species distribution. pp. 1-9. ISSN 0128-1283

Wan Mohd. Shukri W.A. Wan Razali W.M. Ashari M. 1997. Natural forest dynamics. I. Homogenity of species distribution. This study was carried out on a randomly chosen 10 ha (200 x 500 m) forest area within the 50 ha Demography Project area of the Forest Research Institute Malaysia (FRIM) in Pasoh Forest Reserve Negeri Sembilan Malaysia. The 10 ha study area contained 13 950 trees of 5 cm dbh larger with a total of 619 species. Of the total 619 species 26 (4.2 percent) species were of dipterocarps 525 (84.8 percent) non-dipterocarps and 68 (11.0 percent) miscellaneous species. The results indicate that there is a 95 percent chance of detecting trees belonging to either all dipterocarp all non-dipterocarp or miscellaneous species groups by using a contiguous area of 5 ha; a contiguous area of 2 ha is sufficient to detect trees of all diameter size classes from 5 cm dbh onwards. For practical purpose a contiguous area of 5 ha is sufficiently large to sample and detect tree distribution by species group and size class simultaneously. The implications of the results of the present study are discussed in relation to the need of establishing larger plot size to enumerate tree parameters especially in monitoring forest growth dynamics by major species grouping and size class.

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Abstract

Wan Mohd. Shukri W.A. Wan Razali W.M. Ashari M. 1997. Natural forest dynamics. I. Homogenity of species distribution. This study was carried out on a randomly chosen 10 ha (200 x 500 m) forest area within the 50 ha Demography Project area of the Forest Research Institute Malaysia (FRIM) in Pasoh Forest Reserve Negeri Sembilan Malaysia. The 10 ha study area contained 13 950 trees of 5 cm dbh larger with a total of 619 species. Of the total 619 species 26 (4.2 percent) species were of dipterocarps 525 (84.8 percent) non-dipterocarps and 68 (11.0 percent) miscellaneous species. The results indicate that there is a 95 percent chance of detecting trees belonging to either all dipterocarp all non-dipterocarp or miscellaneous species groups by using a contiguous area of 5 ha; a contiguous area of 2 ha is sufficient to detect trees of all diameter size classes from 5 cm dbh onwards. For practical purpose a contiguous area of 5 ha is sufficiently large to sample and detect tree distribution by species group and size class simultaneously. The implications of the results of the present study are discussed in relation to the need of establishing larger plot size to enumerate tree parameters especially in monitoring forest growth dynamics by major species grouping and size class.

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Item Type:	Article
Additional Information:	Summaries (En Ms)
AGROVOC Term:	SPECIES
AGROVOC Term:	BIODIVERSITY
AGROVOC Term:	FOREST TREES
AGROVOC Term:	DIPTEROCARPACEAE
AGROVOC Term:	FOREST INVENTORIES
AGROVOC Term:	FORESTS
AGROVOC Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:52
URI:	http://webagris.upm.edu.my/id/eprint/17716

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