The ecological importance of three topographical habitat types for the restoration of abandoned rubber plantation at Bukit Gasing Petaling Jaya Peninsular Malaysia

Masahiko Ohsawa, . and Nurfilza Bt. Nasir, . and Baki B. Bakar, . (2011) The ecological importance of three topographical habitat types for the restoration of abandoned rubber plantation at Bukit Gasing Petaling Jaya Peninsular Malaysia. [Proceedings Paper]

A study was conducted in an abandoned ca. 50 years ago rubber plantation to obtain basic information on species composition and structure distribution richness and diversity of tree populations in different topographical positions ridge slope and valley each with a survey plot area measuring 20 m x 20 m for restoration of abandoned rubber sites into natural rainforest at Bukit Gasing 3 05; N and 101 39; E some 57 - 103 m a.s.I. Petaling Jaya Selangor Peninsular Malaysia. Each survey plot was subdivided into 5 m x 5 m sub-quadrats to assess spatial variations in composition and structure. Floristic composition population census of trees with DBH 1.5 cm ground vegetation survey and environmental parameters such as soil moisture soil hardness and canopy openness were recorded in each sub-quadrat. A total of 990 individuals in tree layer excluding tree seedlings in ground vegetation from 66 families were noted from the three topographical positions. Ridges composed of 32 spp. were dominated by the planted Hevea brasiliensis while the slopes 36 spp. was dominated by Ixonanthes reticulata and the valleys 39 spp. were dominated by both H. brasiliensis and I. reticulata and other species such as Gynotroches axillaris. Species diversity with Shannon-Wiener diversity index value was high 2.85 in slope topographical positions with the parallel highest value of basal area of 24 210.6 cm2/400 m2. However the maximum DBH 82.8 em and height 29.3 m of trees were found in the survey plots located in the valley. Valley topographical positions also had the highest soil moisture content 24.6. High species diversity and richness were recorded in the slope plots but high biomass accumulations DBH H were also found in the valley. The restoration of abandoned rubber sites might have been facilitated through rich species pool at slope position and high potential of biomass accumulations in the valley habitat. Hence the continuation of topographical habitat conditions from the ridge slope and valley is important for the future restoration practices.

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Abstract

A study was conducted in an abandoned ca. 50 years ago rubber plantation to obtain basic information on species composition and structure distribution richness and diversity of tree populations in different topographical positions ridge slope and valley each with a survey plot area measuring 20 m x 20 m for restoration of abandoned rubber sites into natural rainforest at Bukit Gasing 3 05; N and 101 39; E some 57 - 103 m a.s.I. Petaling Jaya Selangor Peninsular Malaysia. Each survey plot was subdivided into 5 m x 5 m sub-quadrats to assess spatial variations in composition and structure. Floristic composition population census of trees with DBH 1.5 cm ground vegetation survey and environmental parameters such as soil moisture soil hardness and canopy openness were recorded in each sub-quadrat. A total of 990 individuals in tree layer excluding tree seedlings in ground vegetation from 66 families were noted from the three topographical positions. Ridges composed of 32 spp. were dominated by the planted Hevea brasiliensis while the slopes 36 spp. was dominated by Ixonanthes reticulata and the valleys 39 spp. were dominated by both H. brasiliensis and I. reticulata and other species such as Gynotroches axillaris. Species diversity with Shannon-Wiener diversity index value was high 2.85 in slope topographical positions with the parallel highest value of basal area of 24 210.6 cm2/400 m2. However the maximum DBH 82.8 em and height 29.3 m of trees were found in the survey plots located in the valley. Valley topographical positions also had the highest soil moisture content 24.6. High species diversity and richness were recorded in the slope plots but high biomass accumulations DBH H were also found in the valley. The restoration of abandoned rubber sites might have been facilitated through rich species pool at slope position and high potential of biomass accumulations in the valley habitat. Hence the continuation of topographical habitat conditions from the ridge slope and valley is important for the future restoration practices.

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Item Type:	Proceedings Paper
Additional Information:	9 ref. QH 541.5 R27 I61 2011
AGROVOC Term:	Topography
AGROVOC Term:	Species
AGROVOC Term:	Species diversity
AGROVOC Term:	Trees
AGROVOC Term:	Regeneration
AGROVOC Term:	Rubber
AGROVOC Term:	Plantations
AGROVOC Term:	Habitats
AGROVOC Term:	Peninsular Malaysia
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:14
URI:	http://webagris.upm.edu.my/id/eprint/11618

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