Resource competition likely plays an important role in some insect pollinator declines and in shaping effects of environmental change on pollination services. Past research supports that competition for floral resources affects bee foragers, but mostly with observational evidence and rarely linking foraging with population change. An increasing number of studies ask whether resources limit pollinator populations, using field measurements of reproductive success, time series and models. Findings generally support positive effects of floral resources, but also highlight the potential importance of nest site availability and parasitism. In parallel, recent experiments strengthen evidence that competition reduces access to floral resources. Developing common currencies for quantifying floral resources and integrating analyses of multiple limiting factors will further strengthen our understanding of competitive interactions and their effects in the Anthropocene.

资源竞争可能在某些昆虫传粉者数量下降以及环境变化对传粉服务的影响中起重要作用。过去的研究表明，争夺花卉资源会影响蜜蜂的觅食者，但主要是有观察证据，很少将觅食与种群变化联系起来。越来越多的研究使用繁殖成功率，时间序列和模型的实地测量来询问资源是否限制传粉媒介种群。研究结果通常支持花卉资源的积极影响，但也强调巢位可用性和寄生性的潜在重要性。同时，最近的实验进一步证明了竞争减少了对花卉资源的获取。