Despite their role as keystone organisms, insect pollinator populations have declined across many regions. Although pollinator populations face a multitude of threats, among the most important is habitat loss and degradation. In eastern North America, forested landscapes are thought to serve as strongholds for robust pollinator populations, however, even these high-quality landscapes are increasingly unsuitable for pollinators due to suppression of natural disturbances, which results in mature forests with few floral resources. To enhance landscapes for forest-dependent wildlife, land managers increasingly recognize the value of silviculture for promoting forest regeneration to support early-successional species. Although timber harvest has proven to be an invaluable tool for enhancing forest pollinator habitat, the role of microhabitat components like log landings remains unassessed. Log landings (open areas where harvested logs are loaded for transport) may serve as an important microhabitat component of early seral stands because they are expected to support open conditions and high floral abundance. We sampled 20 log landing/timber harvest interior pairs for bees, butterflies, floral resources, and structural vegetation in the Pocono Mountains of Pennsylvania from June-September 2019. Hierarchical distance models revealed that log landings supported twice as many bees (897 vs 351 bees/ha) and five times as many butterflies (433 vs 88 butterflies/ha) as timber harvest interiors. Likewise, log landings supported about 14 times as many floral resources than timber harvest interiors (109,572 vs 8,431/transect). Among log landings, those with the most floral resources also supported the most bees and butterflies. Collectively, our results support the hypothesis that log landings serve as concentrated resource hubs for bees and butterflies. Future work exploring the role of different plant species (e.g., native vs exotic) in habitat quality for early-successional pollinators would prove useful.

尽管它们是关键生物，但昆虫传粉媒介的数量在许多地区都在下降。尽管传粉者种群面临着众多威胁，但其中最重要的是栖息地的丧失和退化。在北美东部，森林景观被认为是强大传粉媒介种群的据点，然而，由于自然干扰的抑制，即使是这些高质量的景观也越来越不适合传粉媒介，这导致成熟的森林几乎没有花卉资源。为了改善依赖森林的野生动物的景观，土地管理者越来越认识到造林对于促进森林再生以支持早期继承物种的价值。尽管木材采伐已被证明是改善森林传粉者栖息地的宝贵工具，诸如原木登陆等小生境组成部分的作用仍未得到评估。原木登陆（收获原木装载运输的开放区域）可以作为早期 serial 林分的重要微生境组成部分，因为预计它们将支持开放条件和高花卉丰度。从 2019 年 6 月至 9 月，我们在宾夕法尼亚州波科诺山脉为蜜蜂、蝴蝶、花卉资源和结构性植被采样了 20 对原木着陆/木材收获内部对。分层距离模型显示，原木着陆支持两倍的蜜蜂（897 对 351 /ha) 和木材收获内饰的五倍（433 对 88 蝴蝶/公顷）。同样，原木登陆所支持的花卉资源是木材收获内部的 14 倍（109,572 对 8,431/样带）。在原木登陆中，那些拥有最多花卉资源的也养育了最多的蜜蜂和蝴蝶。总的来说，我们的结果支持原木登陆是蜜蜂和蝴蝶的集中资源中心的假设。探索不同植物物种作用的未来工作（例如，本地与外来）对早期传粉媒介的栖息地质量将证明是有用的。