Publication
 

Edge effects on ambrosia beetle assemblages in 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 boundary, consistent with the hypothesis that there is a large influx of X. crassiusculus from oil palm plantation to forest reserve. The population may also, to a lesser extent, be enhanced by forest disturbance at the margin of the reserve.

Penyelidikan dijalankan mengenai kesan tepi terhadap kumpulan kumbang ambrosia di Hutan Simpan Pasoh, iaitu hutan hujan tanah pamah di Semenanjung Malaysia, yang bersempadan dengan ladang kelapa sawit (Elaeis guineensis) yang ditubuhkan pada tahun 1970-an. Kekayaan spesies dan komposisi kulat ambrosia (Scolytidae: Xyleborini) disampel dengan perangkap etanol yang serupa di sepanjang cerun dari kawasan tengah hinggalah ke sempadan hutan tersebut. Bagaimanapun, bilangan sejenis spesies polifagus, Xylosandrus crassiusculus, bertambah secara tetap di bahagian tengah hingga ke tepi hutan, dan menjadi superunggul di sempadan. la terdapat dengan banyaknya di sekitar ladang kelapa sawit dan sempadan hutan, sejajar dengan hipotesis bahawa terdapat kebanjiran masuk X. crassiusculus dari ladang kelapa sawit ke hutan simpan. Populasi juga mungkin bertambah sebahagian kecilnya akibat kerosakan di pinggir hutan simpan.

Abstract in English and Malay; article in English only.

Authors: 
K. Maetô, K. Fukuyama, & L. G. Kirton
Journal: 
Journal of Tropical Forest Science
Year: 
1999
Volume: 
11
Issue: 
3
Pages: 
537-547
Site: 
Pasoh