Disturbances associated with intensive agriculture facilitate the spread of invasive plants that become dominant along habitat edges in fragmented landscapes. Many invasive woody plants offer large quantities of floral resources to bees, but little is known about how invasive plants affect the use of flowering resources in the forest canopy and understory by native bee communities. We sampled the bee community at vertical strata along forest-agriculture edges that varied in density of a dominant invasive shrub Lonicera maackii before, during, and after the flowering period. We also recorded diameters and species identities of woody stems. Bee and woody plant abundance, diversity, and life-history traits were then spatially and temporally compared in response to L. maackii density. Overall, we found that L. maackii structured bee communities through its floral resources by altering bee species composition and supporting greater abundances and species richness of bees during and after its flowering period. We also demonstrated a diverse and abundant bee community up to 16 m high in the forest canopy that is supported by floral resources of native shrubs and trees but sensitive to woody shrub invasion. These findings collectively suggest that this invasive shrub structures the bee community in favor of species that use its own flowers and competes with co-flowering woody species at different vertical strata. Our study emphasizes the importance of forest trees and shrubs for bees in agricultural landscapes and demonstrates potential risks for early-season bees as well as those that cannot use floral resources of this invasive shrub.

集约化农业带来的干扰促进了入侵植物的蔓延，这些植物在支离破碎的景观中沿生境边缘占主导地位。许多入侵性木本植物为蜜蜂提供了大量花卉资源，但对于入侵性植物如何影响原生蜂群落在林冠层和林下的开花资源的利用知之甚少。我们在森林农业边缘的垂直地层上对蜂群落进行了采样，这些蜂群落的开花前，开花中和开花后的主要入侵灌木忍冬（Lonicera maackii）的密度都不同。我们还记录了木质茎的直径和种类。然后在空间和时间上比较蜜蜂和木本植物的丰度，多样性和生活史特征，以响应马氏乳杆菌密度。总的来说，我们发现马氏乳杆菌通过改变蜜蜂的种类组成并在其开花期间和之后支持蜜蜂更大的丰度和物种丰富度，通过其花卉资源来组织蜜蜂群落。我们还展示了在林冠层中高达16 m的多样化和丰富的蜜蜂群落，该群落得到了本地灌木和树木的花卉资源的支持，但对木本灌木的入侵敏感。这些发现共同表明，这种侵入性灌木有利于蜜蜂群落结构，从而有利于使用自己的花朵并与不同垂直地层上共同开花的木本物种竞争。我们的研究强调了林木和灌木对农业景观中蜜蜂的重要性，并证明了早季蜜蜂以及那些无法使用这种入侵灌木的花卉资源的蜜蜂的潜在风险。