Separation of biotic and abiotic impacts on species diversity distribution patterns across a significant climatic gradient is a challenge in the study of diversity maintenance mechanisms. The basic task is to reconcile scale-dependent effects of abiotic and biotic processes on species distribution models. Here, we used a hierarchical modeling method to detect the host specificities of bark beetles (Scolytinae and Platypodinae) with their dependent tree communities across a steep climatic gradient, which was embedded within a relatively homogenous spatial niche. Species turnover of both trees and bark beetles have an opposite pattern along the climatic proxy (represented by the elevation gradients) at the regional scale, but not at local spatial scales. This pattern confirmed the hypothesis wherein emphasis was on influences of macro-climate on local biotic interactions between trees and hosted bark beetle communities, whereas local biotic relations, represented by host specificity dependence, were regionally conserved. At a confined spatial scale, cross-taxa comparisons of β-diversity highlighted the importance of simultaneous impacts from both extrinsic factors related to geography and environment, and intrinsic factors related to organism characteristics. The effects of tree abundance and phylogeny diversity on bark beetle diversity were, to a large extent, indirect, operating via changes in bark beetle abundance through spatial and temporal dynamics of resources distribution. Tree host dependence, which was considered and represented by host specificities, plays a minor role on the hosted beetle community in this concealed wood decomposing interacting system.

中文翻译：

---

树皮甲虫（鞘翅目：Scolytinae 和 Platypodinae）沿海拔梯度对宿主的低依赖性解释了共现变异的模式

在显着气候梯度中区分生物和非生物对物种多样性分布模式的影响是研究多样性维持机制的挑战。基本任务是协调非生物和生物过程对物种分布模型的规模依赖性影响。在这里，我们使用分层建模方法来检测树皮甲虫（Scolytinae 和 Platypodinae）的宿主特异性及其在陡峭气候梯度中的依赖树群落，这些树群落嵌入相对同质的空间生态位中。树木和树皮甲虫的物种更替在区域尺度上沿气候代理（由海拔梯度表示）具有相反的模式，但在局部空间尺度上没有。这种模式证实了假设，其中强调宏观气候对树木和宿主树皮甲虫群落之间局部生物相互作用的影响，而以宿主特异性依赖性为代表的局部生物关系在区域上是保守的。在有限的空间尺度上，β-多样性的跨类群比较强调了与地理和环境相关的外在因素以及与生物特征相​​关的内在因素同时影响的重要性。树木丰度和系统发育多样性对树皮甲虫多样性的影响在很大程度上是间接的，通过资源分布的时空动态变化来影响树皮甲虫的丰度。树宿主依赖性，由宿主特异性考虑和表示，