Enhancing plant diversity in agricultural landscapes promotes both rare bees and dominant crop-pollinating bees through complementary increase in key floral resources

1. Enhancing key floral resources is essential to effectively mitigate the loss of pollinator diversity and associated provisioning of pollination functions in agro-ecosystems. However, effective floral provisioning measures may diverge among different pollinator conservation targets, such as the conservation of rare species or the promotion of economically important crop pollinators. We examined to what extent such diverging conservation goals could be reconciled. 2. We analysed plant–bee visitation networks of 64 herbaceous semi-natural habitats representing a gradient of plant species richness to identify key resource plants of the three distinct conservation target groups rare bees (of conservation concern), dominant wild crop-pollinating bees, and managed crop-pollinating bees (i.e. honey bees). 3. Considering overall flower visitation, rare bees tended to visit nested subsets of plant species which were also visited by crop pollinators (46% and 77% nestedness in the dissimilarity ...

1. 强化关键蜜粉源植物资源，是有效缓解农业生态系统中传粉昆虫多样性丧失及其传粉服务供给衰减的核心举措。然而，针对不同传粉昆虫保护目标的有效蜜粉源配置策略往往存在差异，例如针对珍稀物种的保护，或是促进具有经济价值的作物传粉昆虫种群。本研究旨在探讨此类存在分歧的保护目标可在多大程度上实现协调统一。
2. 本研究针对64个沿植物物种丰富度梯度分布的草本半自然生境的植物-蜂类访花网络展开分析，旨在明确三类不同保护目标类群的关键蜜源植物：受保护关注的珍稀蜂类、优势野生作物传粉蜂类，以及人工管理的作物传粉蜂类（即蜜蜂（Honey bees））。
3. 从整体访花格局来看，珍稀蜂类倾向于访问作物传粉蜂类同样造访的植物物种嵌套子集，其相异性分析下的嵌套性分别达46%与77%……