Boros schneideri is an endangered saproxylic beetle species in Europe, included in the list of species for which micro-reserves are established in Latvia. Micro-reserves for capercaillie lek areas are created in similar habitats in Latvia; therefore, these sites might be suitable for B. schneideri and play an important role in the protection of the species. This study aimed to identify ecological factors affecting the occurrence of B. schneideri and to estimate the species’ population density in Central Latvia. In total, six micro-reserves (primarily established to protect capercaillie lek areas) and six, randomly picked, control territories were examined, including 304 forest stands and 312 pine snags. In total, 109 B. schneideri specimens were found. The most important ecological factors for B. schneideri were the age of the forest stand, the presence of deadwood in different stages of decomposition, and the number of snags per forest stand. All mentioned factors are important structural elements of natural forests; hence, B. schneideri can be considered as an indicator species of natural forest habitats. The most important ecological factors for B. schneideri on a micro-habitat scale are the area and thickness of the remaining bark, presence of Ascomycota fungi mycelium on a trunk, and trunk’s circumference. We suggest that B. schneideri is a pioneer species since larger areas of bark, as well as Ascomycota fungi mycelium are more often found on recently dead trees.

中文翻译：

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受保护的腐木甲虫物种 Boros schneideri (Panzer, 1796) (Coleoptera, Boridae) 在 capercaillie lek 地区的生态学和种群密度计算

Boros schneideri 是一种在欧洲濒临灭绝的腐木甲虫物种，被列入拉脱维亚建立微型保护区的物种名单。在拉脱维亚的类似栖息地中为 capercaillie lek 地区建立了微型保护区；因此，这些地点可能适合 B. schneideri 并在该物种的保护中发挥重要作用。本研究旨在确定影响 B. schneideri 发生的生态因素并估计该物种在拉脱维亚中部的种群密度。总共检查了 6 个微型保护区（主要是为了保护 capercaillie lek 区域而建立的）和 6 个随机选择的控制区域，包括 304 个林分和 312 个松树障碍。总共发现了 109 个 B. schneideri 标本。B. schneideri 最重要的生态因素是林分的年龄、不同分解阶段枯木的存在，以及每个林分的断枝数。所有提到的因素都是天然林的重要结构要素；因此，B. schneideri 可被视为天然森林栖息地的指示物种。B. schneideri 在微生境尺度上最重要的生态因素是剩余树皮的面积和厚度、树干上子囊菌真菌菌丝的存在以及树干的周长。我们建议 B. schneideri 是一种先锋物种，因为在最近枯死的树木上更常发现更大面积的树皮以及子囊菌菌丝体。schneideri 可被视为天然森林栖息地的指示物种。B. schneideri 在微生境尺度上最重要的生态因素是剩余树皮的面积和厚度、树干上子囊菌菌丝体的存在以及树干的周长。我们建议 B. schneideri 是一种先锋物种，因为在最近枯死的树木上更常发现更大面积的树皮以及子囊菌菌丝体。schneideri 可被视为天然森林栖息地的指示物种。B. schneideri 在微生境尺度上最重要的生态因素是剩余树皮的面积和厚度、树干上子囊菌菌丝体的存在以及树干的周长。我们建议 B. schneideri 是一种先锋物种，因为在最近枯死的树木上更常发现更大面积的树皮以及子囊菌菌丝体。