Anthropogenic disturbance and diversity of species: polypores and polypore-associated beetles in forest, forest edge and clear-cut
In boreal coniferous forests, artificial edges often modify the habitat, increasing the likelihood that the diversity and composition of species changes. This study examined the assemblage of polypores and polypore-associated beetles at the edge of mature managed spruce-dominated forests and clear-cuts. The highest number of polypore occurrences and the greatest diversity of polypore species occurred at the clear-cut. In south-facing edges polypores occurred closer to the edge both in clear-cut and in forest than in the north-facing edges. The number of polypore-associated beetle individuals was greatest in the clear-cut, but there was no effect of edge on species richness of beetles. Orientation of the edge had no effect on the distribution of beetles in clear-cut, but in the forest beetles were closer to the edge in south-facing edges than in north-facing edges. The higher density of individuals and greater diversity of species in clear-cut may result from the rapid, short-term increase in dead-wood resource.
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Document Type: Research Article
Publication date: 01 October 2005