Edge effects on amborsia beetle assemblages in a lowland rain forest, bordering oil palm plantations, in Peninsular Malaysia
1999
Maeto, K. (Shikoku Research Centre, Forestry and Forest Products Research Institute, Asakura-Nishimachi 2-915, Kochi 780-8077 (Japan)) | Fukuyama, K. | Kirton, L.G.
Edge effects on ambrosia beetle assemblages in a lowland rain forest, bordering oil palm plantations, in Peninsular Malaysia. Investigations were made on the edge effects on ambrosia beetle assemblages in Pasoh Forest Reserve, a lowland rain forest in Peninsular Malaysia, which largely borders oil palm plantations (Elaeis guineensis) established in the 1970s. Species richness and composition of the ambrosia beetles (Scolytidae: Xyleborini) sampled with ethanol traps were not considerably changed along a gradient from the core area to the boundary of the forest. However, a polyphagous species, Xylosandrus crassiusculus, consistently increased in number from the core to the forest edge, being super-dominant at the boundary. It was as abundant at the surrounding oil palm plantation as in the forest boudnary, consistent with the hypothesis that there is a large influx of X. crassiusculus from oil plam plantation to forest reserve. The population may also, to a lesser extent, be enhanced by forest disturbance at the margin of the reserve.
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