Bark and ambrosia beetles (Curculionidae: Scolytinae) are known for their symbioses with fungi and play a key role in the dispersal of phytopathogens. The scolytine community of eight pine stands along a latitudinal gradient in the UK was surveyed and beetle-associated fungal communities (mycobiota) were assessed using ITS2 metabarcoding (304 specimens, 12 species). Distribution patterns among 2,257 detected fungal Operational Taxonomic Units (OTUs) revealed that beetle species identity was an important predictor of mycobiotic richness and composition, while the effects of environmental and spatial variables were negligible. Network-based specificity analysis suggested that a relatively small subset of OTUs (75 in total) exhibit an affinity for a subset of beetle species and that these include many Microascales and Saccharomycetes. Notably though, of the OTUs belonging to the family Ophiostomataceae, relatively few display host specificity. Our results add to the complex picture of host-associated fungal communities and suggest that host range limits are unlikely to restrict the spread of economically important phytopathogens.

树皮和失落的甲虫（Curculionidae：Scolytinae）以与真菌共生而著称，在植物病原菌的传播中起关键作用。在英国，调查了八个松林沿纬向梯度的鞘脂群落，并使用ITS2元条形码（304个标本，12种）对与甲虫相关的真菌群落（真菌菌群）进行了评估。在2,257个检测到的真菌操作分类单位（OTU）中的分布模式表明，甲虫种类的同一性是霉菌丰富度和组成的重要预测指标，而环境和空间变量的影响则可以忽略不计。基于网络的特异性分析表明，相对较小的OTU子集（总计75个）对甲虫物种的子集表现出亲和力，并且其中包括许多微米级和糖菌类。值得注意的是 在属于眼镜蛇亚科（Ophiostomataceae）的OTU中，相对较少的显示宿主特异性。我们的结果使寄主相关真菌群落的情况更加复杂，并表明寄主范围的限制不太可能限制经济上重要的植物病原体的传播。