The habitat boundaries between crops and seminatural areas influence bee movements and pollination services to crops. Edges also provide favorable conditions for invasive plants, which may usurp pollinators and reduce visitation to native or crop plants. Alternatively, floral displays of alien plants may facilitate, or increase, the pollination success of adjacent plants by attracting more pollinators to the area. Therefore, pollination services of bees from seminatural habitats to crop areas should vary with the presence of invasive floral resources and distance from habitat edges. To test the hypothesis that floral resources of invasive forest shrubs affect the bee community and pollination services in adjacent crop fields, we conducted a 2‐yr field experiment along forest–crop edges at five isolated forest remnants. We removed flower buds from a dominant invasive shrub, Lonicera maackii (Amur honeysuckle), along forest–crop edges and paired removals with controls of intact flowers. The bee community, their pollination services, and flower visitation rates were quantified along a 200‐m gradient into an adjacent crop field using pan traps and sentinel cucumber plants. Impacts to the bee community were dependent of bee functional traits. Larger bees visited fewer sentinel cucumber flowers in flower removal plots, which corresponded with decreased cucumber pollination compared to plots with honeysuckle flowers at distances >100 m from forest edges. Small‐bodied and weaker flying bees visited sentinel plants more frequently closer to the forest edge and increased pollination services to cucumber at distances <100 m from L. maackii shrubs in flower removal plots. After 2 yr, bee abundance and species richness increased within flower removal plots across all distances. High functional diversity of the bee community increased pollination services to sentinel plants and increased cucumber production within 200 m from forest remnants. Our findings suggest that dense floral resources of invasive shrubs suppressed forest‐edge bee communities and their pollination services, but also attracted large‐bodied generalist bees, which were effective pollinators. This study helps explain how life histories and functional attributes of bees can predict either facilitation or suppression of pollination services to crop or native plants in response to invasive floral resources.

中文翻译：

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在入侵性森林灌木中摘除花朵后，相邻作物田中的蜜蜂群落和授粉服务。

作物和半自然地区之间的栖息地边界影响蜜蜂的活动和对作物的授粉服务。边缘还为入侵植物提供了有利条件，入侵植物可能会侵害传粉媒介并减少对本地植物或农作物的访问。可替代地，外来植物的花卉展示可以通过吸引更多的传粉媒介到该地区来促进或增加相邻植物的授粉成功。因此，蜜蜂从半自然生境到作物区域的授粉服务应随侵入性花卉资源的存在和距生境边缘的距离而变化。为了检验以下假设：入侵性森林灌木的花卉资源会影响相邻作物田中的蜜蜂群落和授粉服务，我们在五个孤立的森林遗迹沿森林作物边缘进行了为期2年的田间试验。Lonicera maackii（金银花），沿森林作物边缘分布，成对的摘花与完整花的对照。使用盆栽诱捕器和前哨黄瓜植株，以200 m的坡度对蜜蜂群落，其授粉服务和花访率进行了定量分析。对蜜蜂群落的影响取决于蜜蜂的功能性状。较大的蜜蜂在除花地块访问较少的前哨黄瓜花，这与距森林边缘> 100 m处的金银花花样的土地相比，黄瓜的授粉减少。体型较弱且飞行较弱的蜜蜂更频繁地探访前哨植物，使其更靠近森林边缘，并在距马氏乳杆菌<100 m的地方增加了对黄瓜的授粉服务清除花地上的灌木。2年后，在所有距离的摘花小区内，蜜蜂的丰度和物种丰富度都增加了。蜜蜂群落的高度功能多样性增加了对前哨植物的授粉服务，并增加了森林残留物200 m以内的黄瓜产量。我们的发现表明，入侵灌木的密集花卉资源抑制了森林边缘的蜜蜂群落及其授粉服务，但也吸引了大面积的通才蜂，它们是有效的授粉媒介。这项研究有助于解释蜜蜂的生活史和功能属性如何预测对入侵花卉资源的农作物或本地植物的授粉服务促进或抑制。