Coarse woody debris stocks and inputs in a primary hill dipterocarp forest Peninsular Malaysia

Abd Rahman K., . and Yagihashi T., . and Azizi R., . and Sato T., . and Niiyama K., . Coarse woody debris stocks and inputs in a primary hill dipterocarp forest Peninsular Malaysia. pp. 382-391. ISSN 0128-1283

Hill dipterocarp forests are a major forest type within the tropical lowland evergreen rainforests of Peninsular Malaysia. However the coarse woody debris(CWD) dynamics of these forests remain poorly understood. To improve our understanding of CWD dynamics in hill dipterocarp forests we investigated stocks and inputs of CWD under different topographical conditions in Semangkok Forest Reserve Selangor Malaysia. The total CWD (mean standard error of the mean) was 81.7 17.0 Mg ha-1 with a range of 0.1 to 379.7 Mg ha-1. Although we found no significant differences in total CWD among topographies the large CWD stock may have resulted from the relatively large amount of aboveground biomass in this hill dipterocarp forest. Downed CWD (fallen logs and uproots) was higher than standing CWD (standing dead and snaps) regardless of slope position. The mean CWD input from tree mortality was 8.2 2.2 Mg ha-1 year-1 over 18 years. Assuming the long-term equilibrium of stocks and inputs the turnover time was 16.6 3.7 years with no significant differences among topographies. Thus our study demonstrated the importance of large tree mortality to CWD dynamics in hill dipterocarp forests using long-term tree census data.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v28n5/3...

Abstract

Hill dipterocarp forests are a major forest type within the tropical lowland evergreen rainforests of Peninsular Malaysia. However the coarse woody debris(CWD) dynamics of these forests remain poorly understood. To improve our understanding of CWD dynamics in hill dipterocarp forests we investigated stocks and inputs of CWD under different topographical conditions in Semangkok Forest Reserve Selangor Malaysia. The total CWD (mean standard error of the mean) was 81.7 17.0 Mg ha-1 with a range of 0.1 to 379.7 Mg ha-1. Although we found no significant differences in total CWD among topographies the large CWD stock may have resulted from the relatively large amount of aboveground biomass in this hill dipterocarp forest. Downed CWD (fallen logs and uproots) was higher than standing CWD (standing dead and snaps) regardless of slope position. The mean CWD input from tree mortality was 8.2 2.2 Mg ha-1 year-1 over 18 years. Assuming the long-term equilibrium of stocks and inputs the turnover time was 16.6 3.7 years with no significant differences among topographies. Thus our study demonstrated the importance of large tree mortality to CWD dynamics in hill dipterocarp forests using long-term tree census data.

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Item Type:	Article
AGROVOC Term:	Woody plants
AGROVOC Term:	Dipterocarps
AGROVOC Term:	Lowland
AGROVOC Term:	Rain forests
AGROVOC Term:	Topography
AGROVOC Term:	Evergreen plants
AGROVOC Term:	Forest reserves
AGROVOC Term:	Biomass
AGROVOC Term:	Mortality
AGROVOC Term:	Logs
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 00:40
URI:	http://webagris.upm.edu.my/id/eprint/22910

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