Light conditions canopy conditions and microtopographies in the microsites of Shorea curtisii saplings in a hill dipterocarp forest of the Semangkok Forest Reserve Peninsular Malaysia

Kominami Y., . and Tanouchi H ., . and Tanaka H ., . and Katsuki T ., . and Azman Hassan, . Light conditions canopy conditions and microtopographies in the microsites of Shorea curtisii saplings in a hill dipterocarp forest of the Semangkok Forest Reserve Peninsular Malaysia. pp. 247-255. ISSN 0128-1283

Light conditions canopy conditions and microtopographies in the microsites of Shorea curtisii saplings in a hill dipterocarp forest of the Semangkok Forest Reserve Peninsular Malaysia. Light conditions canopy conditions and microtopographies of natural habitats of Shorea curtisii saplings in a hill dipterocarp forest of Peninsular Malaysia were examined to determine the features of the sapling microsites. We estimated values of photosynthetic photon flux density (PPF) above 41 saplings of S. curtisii and at 301 points systematically positioned in a 2.6-ha study plot. A computerised technique for the analysis aof hemispeherical photographs was used for estimating the PPFs. The microsite types were classified from canopy conditions and microtopographies. Although PPFs on gentle slopes were significantly higher than on steep slopes the densities of S. curtisii saplings were not different between the slopes. The density of S. curtisii saplings and the PPFs in canopy gaps were not significantly different from the values under closed canopy. Most of the PPFs at each microsite type were within the range of PPFs above the saplings of S. curtisii and the sapling bank was maintained at all microsite types in the study plot. It is likely that most of the microsites receive sufficient light to maintain the sapling bank of S. curtisii.

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Abstract

Light conditions canopy conditions and microtopographies in the microsites of Shorea curtisii saplings in a hill dipterocarp forest of the Semangkok Forest Reserve Peninsular Malaysia. Light conditions canopy conditions and microtopographies of natural habitats of Shorea curtisii saplings in a hill dipterocarp forest of Peninsular Malaysia were examined to determine the features of the sapling microsites. We estimated values of photosynthetic photon flux density (PPF) above 41 saplings of S. curtisii and at 301 points systematically positioned in a 2.6-ha study plot. A computerised technique for the analysis aof hemispeherical photographs was used for estimating the PPFs. The microsite types were classified from canopy conditions and microtopographies. Although PPFs on gentle slopes were significantly higher than on steep slopes the densities of S. curtisii saplings were not different between the slopes. The density of S. curtisii saplings and the PPFs in canopy gaps were not significantly different from the values under closed canopy. Most of the PPFs at each microsite type were within the range of PPFs above the saplings of S. curtisii and the sapling bank was maintained at all microsite types in the study plot. It is likely that most of the microsites receive sufficient light to maintain the sapling bank of S. curtisii.

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Item Type:	Article
Additional Information:	Summaries (En Ms)
AGROVOC Term:	SHOREA
AGROVOC Term:	DIPTEROCARPACEAE
AGROVOC Term:	LIGHT
AGROVOC Term:	CANOPY
AGROVOC Term:	TOPOGRAPHY
AGROVOC Term:	GEOGRAPHICAL DISTRIBUTION
AGROVOC Term:	SEEDLINGS
AGROVOC Term:	GROWTH
AGROVOC Term:	FORESTS
AGROVOC Term:	FOREST PLANTATIONS
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:52
URI:	http://webagris.upm.edu.my/id/eprint/17909

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