1. Volcanic eruptions often modify the structure and function of ecosystems at large geographical scales. However, the extent to which species diversity patterns respond to these major natural disturbances is still poorly known. We tested the shape of the species richness – elevation relationship (SRER) and its environmental correlates (thermal environment at ground level, vegetation structure and soil attributes) before and 6 months after (in the first summer) the most recent eruption of the Puyehue Cordon Caulle volcanic complex (PCCVC), which caused an extensive ash accumulation in northwestern Patagonia, Argentina.
2. We re‐established 32, 100‐m² sampling plots of nine pitfall traps, placed every 100 m of altitude from the base to the summit of three mountains differentially affected by ash deposition, and from which we had pre‐eruption data on richness and environmental variables.
3. Coverage‐based rarefaction/extrapolation curves showed a local post‐eruptive decrease in richness on only one mountain. Generalised additive models (GAMs) showed no significant differences between pre‐ and post‐eruptive SRER shapes. Partial least squares structural equation modelling (PLS‐SEM) showed that woody vegetation and the thermal environment accounted for most of the variation in richness before and after the eruption. Soil attributes were only indirectly associated with beetle richness and the association was mediated by woody vegetation. Ash accumulation ameliorated the thermal environment, promoting a local increase in beetle richness.
4. The rapid recovery of the SRER shape and its environmental correlates suggest that the structuring of local diversity patterns at temperate latitudes of the southern hemisphere is resilient to major volcanic eruptions.

中文翻译：

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在阿根廷西北巴塔哥尼亚发生一次重大火山事件后，甲虫的丰富度-海拔关系及其环境相关性迅速恢复

1. 火山喷发经常在较大的地理尺度上改变生态系统的结构和功能。但是，人们对物种多样性模式对这些主要自然干扰的反应程度还知之甚少。我们测试了Puyehue Cordon最近喷发之前和之后的6个月，测试了物种丰富度-海拔关系（SRER）的形状及其与环境的相关性（地面热环境，植被结构和土壤属性） Caulle火山综合体（PCCVC）在阿根廷西北巴塔哥尼亚地区引起大量的灰烬堆积。
2. 我们重新建立了32个100平方米^2个采样坑，其中有9个陷阱陷阱，每100 m的高度从灰分沉积影响的三个山脉的山顶到山顶，每100 m就有一个，并从中获得了丰富度和喷发前的喷发数据。环境变量。
3. 基于覆盖度的稀疏/外推曲线表明，仅在一座山上，喷发后局部富裕度下降了。广义加性模型（GAM）显示出喷发前和喷发后SRER形状之间没有显着差异。偏最小二乘结构方程模型（PLS‐SEM）表明，木本植物和热环境是喷发前后丰富度变化的主要部分。土壤属性仅与甲虫的丰富度间接相关，而该相关性是由木本植被介导的。积灰改善了热环境，促进了甲虫丰富度的局部增加。
4. SRER形状及其环境相关性的快速恢复表明，南半球温带纬度的局部多样性格局的构造可抵抗主要的火山喷发。