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首页> 外文期刊>Journal of Insect Conservation >Diversity loss and changes in saproxylic beetle assemblages following a high-severity fire in Araucaria-Nothofagus forests
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Diversity loss and changes in saproxylic beetle assemblages following a high-severity fire in Araucaria-Nothofagus forests

机译：在Araucaria-Nothofagus森林中高分性火灾后皂甲虫组装的多样性丧失和变化

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Forest fires have increased in frequency worldwide due to global warming, drought, and land-use change. These fire-regime changes have altered the dynamics of deadwood accumulation in forests, which can affect biological communities dependent on this resource. We analyzed the effect of high-severity fire events on saproxylic beetle assemblages, which specialize in using deadwood that accumulates after disturbances. We compared assemblages in sites severely burned in 2002 to those in unburned sites in Chilean Araucaria-Nothofagus forests. Insects were collected using window-interception traps from spring 2017 to summer 2018. Rarefaction-interpolation curves revealed a significant decrease in diversity as a result of fire. Permutational multivariate analysis of variance showed a significant effect of fire on insect community structure. In addition, we observed that species turnover contributing most, and nestedness to a lesser extent, to differences in ss-diversity between burned and unburned sites. Species replacement was associated with an increase in abundance of xylophagous (deadwood feeders) and a decrease in abundance of mycophagous (fungivorous) insects with fire. Therefore, our results suggest that fire causes a reduction in diversity while benefiting the abundance of xylophagous beetles in Araucaria-Nothofagus forests. We recommend the use of these insects as an evaluation tool in conservation planning, management practices, and ecological restoration efforts in burned forests in southern Chile.
机译：由于全球变暖，干旱和土地利用变化，森林火灾在全球频率增加。这些火灾制度变化改变了森林中的死木积累的动态，这可能影响依赖这种资源的生物社区。我们分析了皂甲虫组合上的高度严重性火灾事件的影响，它专注于使用休闲后积累的死木。我们比较了2002年严重燃烧的地点的集会，以至于智利araucaria-nothofagus森林的未燃烧遗址。从2017年春季到2018年夏季，使用窗口拦截陷阱收集昆虫。稀疏插值曲线显示出火灾导致的多样性显着降低。依赖多元的方差分析显示出火灾对昆虫群落结构的显着影响。此外，我们观察到物种营业额造成最多，嵌套在较小程度上，燃烧和未燃烧场地之间的SS-多样性的差异。物种替代与大量的木糖（黄色饲养者）的增加有关，并降低丰富的肉体（无毒性）昆虫与火灾。因此，我们的结果表明，火灾导致多样性降低，同时有益于秋葵 - Nothofagus森林的丰富瘢痕疙甲虫。我们建议使用这些昆虫作为智利烧毁森林中的保护计划，管理实践和生态恢复努力的评估工具。

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