Urban areas can serve as biodiversity refuges for pollinators because of the high diversity of available floral and nesting resources. However, it remains unclear what plant species commonly used for urban landscaping provide floral resources that pollinators actively use. Here, we integrate data from the pollen and species distribution models of two abundant euglossine bees—the large-bodied Eulaema nigrita (Lepeletier, 1841) and the small-bodied Euglossa cordata (Linnaeus, 1758)—in urban areas to investigate their overlap in diet breadth and distribution. We hypothesized that because bees with larger body sizes tend to have larger foraging areas, large-bodied bees would have a wider diet breath than small-bodied bees. Contrary to our hypothesis, we found that Eg. cordata has a wider diet breadth than El. nigrita with the former species showing higher diversity of pollen types collected (per pollen load and on average across pollen loads). Pollen grains from Solanum paniculatum and Tradescantia zebrina represented 63% of the diet of Eg. cordata, whereas pollen from S. paniculatum and Psidium guajava represented 87% of the diet of El. nigrita. After overlaying the distribution of both bee species and the three most important pollen resources, the distribution models revealed that these three plant species can co-occur with both euglossine bees throughout a large portion of eastern Brazil near the coast. Thus, we conclude S. paniculatum, T. zebrina, and P. guajava should be considered key plants for the maintenance of these two urban euglossine bee species. The results of this study provide important information for urban landscaping programs that aim to protect and preserve pollinators.

由于可用花卉和筑巢资源的高度多样性，城市地区可以作为传粉媒介的生物多样性避难所。然而，目前尚不清楚通常用于城市景观的植物物种提供传粉媒介积极使用的花卉资源。在这里，我们整合了来自城市地区两种丰富的 Euglossine 蜜蜂——大型Eulaema nigrita (Lepeletier, 1841) 和小型Euglossa cordata (Linnaeus, 1758)——的花粉和物种分布模型的数据，以调查它们在饮食广度和分布。我们假设，因为体型较大的蜜蜂往往有更大的觅食区域，所以大型蜜蜂的饮食呼吸会比小型蜜蜂更广泛。与我们的假设相反，我们发现Eg。数据比El的饮食范围更广。nigrita与前一个物种显示出更高的花粉类型多样性（每个花粉负荷和平均花粉负荷）。来自Solanum paniculatum和Tradescantia zebrina 的花粉粒占Eg饮食的 63% 。cordata，而来自S. paniculatum和Psidium guajava 的花粉占El饮食的 87% 。黑胡椒。在覆盖了两种蜜蜂物种和三种最重要的花粉资源的分布后，分布模型显示，这三种植物物种可以在巴西东部靠近海岸的大部分地区与两种真色蜜蜂共生。因此，我们得出结论S. paniculatum、T. zebrina和P. guajava应被视为维持这两种城市 Euglossine 蜜蜂物种的关键植物。这项研究的结果为旨在保护和保护传粉媒介的城市景观计划提供了重要信息。