Short-term responses of ground-active beetles to alternative silvicultural systems in the Warra Silvicultural Systems Trial, Tasmania, Australia

FOREST ECOLOGY AND MANAGEMENT

卷:258

Article; Proceedings Paper

Baker, Susan C.²  Grove, Simon J.^1,2 

[1] Forestry Tasmania, Biol & Conservat Branch, Div Forest Res & Dev, Hobart, Tas 7001, Australia

[2] CRC Forestry, Hobart, Tas 7001, Australia

关键词: Coleoptera;    Green tree retention;    Variable retention;    Clearfelling;    Silvicultural systems;    Forest management;    Biodiversity conservation;   

DOI  :  10.1016/j.foreco.2009.03.044

来源: Elsevier

【 摘 要 】

The Warta Silvicultural Systems Trial (SST) in Tasmania, Australia provides a framework for investigating the responses of beetles (Order: Coleoptera) to three alternative systems in lowland wet eucalypt forest: aggregated retention; dispersed retention: and understorey islands retained in clearfelled areas. Beetles from three families known to be sensitive to forest management, the families Carabidae (ground-beetles), Curculionidae (weevils) and Leiodidae (fungus-beetles), were collected with pitfall traps prior to harvest, and in the first and third years post-harvest. The retained aggregates in the aggregated retention system maintained beetle assemblages reasonably typical of mature forests, at least in these early years following harvesting. These aggregates appear to provide a stable habitat, with similar species composition in the first and third years post-harvest. In contrast, the harvested areas of the aggregated retention system contained low numbers of beetle species affiliated with mature forest, as did the understorey islands and the dispersed retention system. Relative to clearfelling, all alternative silvicultural systems appeared to be of some benefit to beetles affiliated with mature forest, but aggregated retention retained far greater numbers of these beetles compared to the other systems in Tasmanian wet eucalypt forest. (C) 2009 Elsevier B.V. All rights reserved.

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