Woody debris left after timber harvest may be used to produce bioenergy. This will help reduce reliance on nonrenewable fossil fuels. There are ecological impacts to the use of this woody material as many species use coarse woody debris for food and shelter. An understanding of how the removal of woody biomass after forest harvest changes the functional diversity of forest communities is needed to make sustainable management decisions. Many longhorned beetles (Coleoptera: Cerambycidae) provide ecosystem services by reducing woody debris in forests and pollinating flowering plants including trees. I used a taxonomically and functionally diverse community of longhorned beetles to examine changes to functional diversity following different levels of biomass removal in a secondary forest in south-central Indiana, USA. The functional diversity was measured prior to forest harvest and biomass removal and for 2 yr after treatment. I predicted that the abundance and functional group richness of the longhorned beetles would correlate positively with the volume of woody biomass left on the site, and that the community would show resilience by returning to the functional portfolio that was in place in the pre-harvest communities and occurred in the control. The abundance and functional group richness increased with more woody debris left on site. There was much variance in the trajectory of the community following harvest, with no clear trend toward pre-harvest functional portfolio that would indicate resilience. A 3-yr study is likely not long enough to capture this resilience, especially on sensitive sites.

中文翻译：

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响应生物质收获的长角甲虫功能多样性

木材采伐后留下的木质碎片可用于生产生物能源。这将有助于减少对不可再生化石燃料的依赖。由于许多物种使用粗木屑作为食物和住所，因此使用这种木质材料会产生生态影响。需要了解森林采伐后木质生物质的去除如何改变森林群落的功能多样性，以做出可持续的管理决策。许多长角甲虫（鞘翅目：天牛科）通过减少森林中的木质碎片和为包括树木在内的开花植物授粉来提供生态系统服务。我使用了一个分类学和功能多样化的长角甲虫群落来检查在美国印第安纳州中南部的次生林中不同程度的生物量去除后功能多样性的变化。在森林采伐和生物量去除之前以及处理后 2 年测量功能多样性。我预测，长角甲虫的丰度和功能组丰富度将与留在场地上的木质生物量呈正相关，并且社区将通过恢复到收获前社区中的功能组合来表现出复原力并发生在对照中。随着现场留下的木质碎片增多，丰度和官能团丰富度增加。收获后社区的轨迹存在很大差异，收获前功能组合没有明显的趋势表明恢复力。一项为期 3 年的研究可能不足以捕捉这种弹性，尤其是在敏感地点。