Keywords
rain forest
How to Cite
Abstract
Canopy fogging with a pyrethrum-based insecticide was used in a comparative study ofthe
structure and diversity ofinsect communities in two genera ofoak trees (family Fagaceae) at study sites of
500, 1200-1400 and 2000-2200 m elevation along a transect through primary rain forest in Papua New
Guinea (ca. 7° S latitude). Eight trees were fogged (two individuals ofCastanopsis acuminatissima at each
ofthe three study sites and two Lithocarpuscelebicusat 500 m). Insects were collected in 1m2 trays suspended
beneath the trees and identified to morphospecies. The trees yielded 4840 individual beetles representing
633 species in 54 families. Diversity (measured by a) was highest at the 2000-2200 m study site, lowest
at 1200-1400 m and intermediate at 500 m. There was 22-31% overlap in the beetle fauna ofconspecific
trees at the same site. Overlap between sites ranged from 2-12%. These trends are being studied from
additional trees at each ofthe three sites.
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