Effect of selective logging on the genetic diversity of Scaphium macropodum

Chai Ting Lee, R Wickneswari V Ratnam, M. C. Mahani, A. H. Zakri

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We examined the effect of selective logging on the genetic diversity of Scaphium macropodum using RAPD markers via two approaches: (1) to investigate the immediate effect by studying a same population before and after logging, and (2) to determine the long term effect by comparing two regenerated stands with an adjacent unlogged stand, assuming that they were genetically identical before logging. Results showed no negative immediate impact for the first approach, probably due to the high abundance and heterogeneity of S. macropodum in the compartment investigated. However, for the latter approach, substantial genetic erosion (i.e. 31.5% reduction for Shannon diversity, H) was detected in one of the regenerated stands corresponding to its extremely low tree density for S. macropodum. This implies the possible occurrence of genetic drift and increased inbreeding due to population decline as a result of logging. However, the observed genetic differences among the three sub-populations having prevailed before logging cannot be totally discounted in the second approach. This study also demonstrates the use of tree density as a good surrogate measure of genetic diversity. The present harvesting system in Malaysia based on a general cutting limit need to be refined; the basis for determining cutting limit in a forest management unit should consider abundance of commercial species.

Original languageEnglish
Pages (from-to)107-118
Number of pages12
JournalBiological Conservation
Volume104
Issue number1
DOIs
Publication statusPublished - 2002

Fingerprint

selective logging
logging
genetic variation
commercial species
genetic drift
population decline
inbreeding
subpopulation
forest management
Malaysia
long term effects
erosion
genetic diversity
effect
Scaphium macropodum
cutting (process)

Keywords

  • Erosion
  • Genetic diversity
  • Scaphium macropodum
  • Selective logging
  • Tree density

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

Cite this

Effect of selective logging on the genetic diversity of Scaphium macropodum. / Lee, Chai Ting; V Ratnam, R Wickneswari; Mahani, M. C.; Zakri, A. H.

In: Biological Conservation, Vol. 104, No. 1, 2002, p. 107-118.

Research output: Contribution to journalArticle

Lee, Chai Ting ; V Ratnam, R Wickneswari ; Mahani, M. C. ; Zakri, A. H. / Effect of selective logging on the genetic diversity of Scaphium macropodum. In: Biological Conservation. 2002 ; Vol. 104, No. 1. pp. 107-118.
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