Abstract
The diel activity of arboreal arthropods associated with the Australian rainforest tree Argyrodendron actinophyllum was investigated with interception traps during a week in the summer season. When all arthropods were considered, there were no significant differences in flight activity, expressed as either numbers of individuals, numbers of species or biomass, between day-time and night-time. Flights of fungalfeeding species were not restricted to night-time, presumably because scents may also spread well during day-time with the high humidity of the rainforest. However, arthropod activity was high during night-time in comparison with temperate woodlands, and herbivores were generally more active during night-time than during day-time, whereas this was the reverse for predators and parasitoids. These limited data tend to support the hypothesis that some herbivores may feed during night-time in rainforests in order to escape predators and parasitoids.
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