Keywords
arthropods
rain forest
How to Cite
Abstract
Studies ofcanopyarthropods in a numberofAustralian rainforest types have beenin progress
since 1983. Information on the variation in ordinal signatures and overall levels ofabundance in tropical,
subtropical and cool temperate sites is available, as are estimates ofbeta-diversity among sites within the
subtropical forest. Species level studies on selected Orders are well advanced and current work focuses
upon the Coleoptera, Psocoptera, Collembola and Lepidoptera.
A severe drought affected the tropical forests ofNorth Queensland in 1991-1992. This had the impact
ofreducing insect numbers dramatically particularly in the high canopy. Significant declines in numbers
ofDiptera, Coleoptera, Lepidoptera and Collembola were recorded. A significant increase in the numbers
ofPsocoptera was noted. Impact appeared to be generally greater in the high than the low canopy. The
possible mechanisms for these patterns are discussed.
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