Arthropod fauna of jarrah (Eucalyptus marginata) foliage in Mediterranean forest of Western Australia: spatial and temporal variation in abundance, biomass, guild structure and species composition.
1992
Abbott I. | Burbidge T. | Williams M. | Van Heurck P.
A 2 year study of the arthropod fauna of jarrah crowns in a 75 sq km area centred on Manjimup, Western Australia, yielded 7461 individuals belonging to 396 species. Lepidoptera, Hemiptera and Araneae dominated the fauna in abundance and biomass but Lepidoptera less so in number of species. Consequently, leaf chewers, sapsuckers and predators were the dominant guilds. Most species showed great spatial and temporal variation in their occurrence, with some 73 percent being recorded on only 1 or 2 of the 9 sampling occasions. The most abundant arthropod, the pest defoliator Uraba lugens, did not reduce appreciably the biomass or abundance of other arthropod groups present in jarrah pole crowns. This is consistent with the paradigm that competition between species of herbivorous insects is infrequent. After comparison with other studies in jarrah forest, it was tentatively concluded that there is no single fixed pattern of organization or predictable assemblage of invertebrates on jarrah foliage.
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