Pollinators play pivotal roles in maintaining agricultural and natural plant communities, yet some bee populations are declining. Loss of pollinator habitats as a result of agricultural intensification and urbanization have reduced bee abundance and diversity. Additionally, climate change has affected bee distributions and led to disruption of plant-pollinator synchrony, impacting ecosystem processes. However, how these factors concurrently influence bee assemblages is poorly understood. Therefore, we evaluated bumble bee (Bombus) assemblages in relation to the proportion of agricultural, semi-natural, and urban land cover and interannual variation in temperature, precipitation, and relative humidity in Utah agroecosystems using Bombus captured as bycatch in pest monitoring traps from 2014 to 2018. Bombus assemblage composition was highest in agricultural sites with increased agricultural land cover in the surrounding area, low temperatures, and high relative humidity during the growing season; and lowest in sites with increased urban land cover, high temperatures, and low relative humidity. Functional dispersion did not differ among these groups indicating a range of tongue lengths, body sizes, hair lengths, and hair types were present within all agricultural sites. Further, high beta-diversity, as indicated by unique Bombus assemblages among sites, suggests that all agricultural sites in this study have potential conservation value for maintaining Bombus communities. Therefore, it is important that diverse habitats for pollinators are maintained through targeted management techniques. Additionally, our collection of Bombus from mid-May to mid-September identified phenological overlap within Bombus assemblages, which helps ensure pollination services are provided even if a particular species is lost due to environmental disturbances. However, while there is overlap in functional traits and phenology, considerations should be given due to widespread pollinator declines. Overall, evaluating landscape and climate variables together may yield more realistic results and better inform effective management and land-use planning strategies to prevent ecological homogenization and to foster future resiliency of Bombus populations.

传粉媒介在维持农业和自然植物群落方面发挥着关键作用，但一些蜜蜂数量正在下降。由于农业集约化和城市化，传粉媒介栖息地的丧失减少了蜜蜂的数量和多样性。此外，气候变化影响了蜜蜂的分布，并导致植物-传粉者同步中断，影响生态系统过程。然而，这些因素如何同时影响蜜蜂组合却知之甚少。因此，我们使用Bombus评估了与犹他州农业生态系统中农业、半自然和城市土地覆盖的比例以及温度、降水和相对湿度的年际变化有关的大黄蜂 ( Bombus ) 组合从 2014 年到 2018 年，在害虫监测陷阱中作为兼捕捕获。在周边地区农业用地覆盖增加、生长季节低温和高相对湿度的农业地点，熊蜂群落组成最高；在城市土地覆盖增加、高温和低相对湿度的地点最低。这些组之间的功能分散没有差异，表明所有农业地点都存在一系列舌头长度、体型、头发长度和头发类型。此外，高 β 多样性，如地点之间独特的Bombus组合所示，表明本研究中的所有农业地点都具有维持Bombus的潜在保护价值社区。因此，重要的是通过有针对性的管理技术来维持传粉媒介的多样化栖息地。此外，我们从 5 月中旬到 9 月中旬收集的熊蜂发现了熊蜂组合内的物候重叠，这有助于确保即使特定物种因环境干扰而丧失，也能提供授粉服务。然而，虽然功能性状和物候学存在重叠，但由于传粉媒介普遍减少，应予以考虑。总体而言，一起评估景观和气候变量可能会产生更现实的结果，并更好地为有效的管理和土地利用规划战略提供信息，以防止生态同质化并促进Bombus未来的弹性人口。