Trees host a large share of the global arthropod diversity. Several methodologies have been described to sample arthropods from trees, ranging from active sampling techniques (e.g., visual searching, beating, or shaking the branches) to passive sampling devices. The majority of these collection techniques are destructive, and do not specifically target the tree trunk arthropod fauna. Here, we describe an alternative sampling method called trunk refugia (TR). TR are cylindrical shelters made of corrugated cardboard that can be secured to trees using string, and can remain exposed for varying time periods. These refugia are inexpensive, easy to use, and suitable to monitor a diverse array of insects and arachnids. Moreover, TR are nonlethal sampling tools, and allow collecting live individuals for behavioral studies or for rearing.

中文翻译：

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树干避难所：对树干节肢动物进行采样的一种简单，便宜的方法。

树木承载着全球节肢动物多样性的很大一部分。已经描述了几种从树上采样节肢动物的方法，从主动采样技术（例如，视觉搜索，殴打或摇动树枝）到被动采样设备。这些收集技术中的大多数具有破坏性，并不专门针对树干节肢动物。在这里，我们描述了一种称为主干避难所（TR）的替代采样方法。TR是由瓦楞纸板制成的圆柱状掩体，可以使用细绳将其固定在树上，并且可以在不同的时间段保持裸露。这些避难所价格便宜，易于使用，并且适合监视各种各样的昆虫和蜘蛛。此外，TR是非致命性采样工具，可以收集活的个体进行行为研究或饲养。