The world is increasingly urban, and urbanization alters the abundance and distribution of resources important to mutualist pollinators. Pollinators require distinct and diverse resources throughout their life cycle, including larval habitat and adult food resources. However, the relationship among urbanization, pollinator resource distribution, pollinator abundance, and pollination service provision are uncertain. Here, we test whether the presence of rat carrion facilitates pollination service to a non-native plant, Ammi majus L. (Apiaceae), by bolstering the pollinator community across an urban gradient. We show that carrion increased pollinator abundance and service provision to focal plants, especially in densely urban landscapes. Specifically, a paired experimental design revealed that in the presence of rat carrion, pollinator abundance increased by more than two-fold and plants received 11.2% greater pollination service across landscapes. Those plants situated in highly urban contexts received the greatest benefits from carrion with the largest abundance of pollinators and highest proportion of viable seed set. We demonstrate how human development facilitates the reproduction of a non-native plant by altering the pollinator community and pollination service provided across an urban gradient. Our findings have both basic and applied implications. First, we show that mutualistic species with complex life histories can provide conduits between various levels of ecosystem processes. Second, we suggest that the removal or reduction of larval habitat may serve as a tool in the management of non-native Apiaceae plants in the upper Midwest.

世界日益城市化，城市化改变了对互惠授粉者重要的资源的丰富和分布。授粉媒介在其整个生命周期中需要独特而多样化的资源，包括幼虫栖息地和成年食物资源。但是，城市化，授粉媒介资源分布，授粉媒介丰度和授粉服务提供之间的关系尚不确定。在这里，我们测试了大鼠腐肉的存在是否有助于向非本地植物Ammi majus授粉L.（Apiaceae），通过在整个城市范围内加强授粉媒介群落。我们显示腐肉增加了传粉媒介的丰度，并为重点植物提供了服务，尤其是在人口稠密的城市景观中。具体而言，一项配对实验设计表明，在存在大鼠腐肉的情况下，传粉媒介的丰度增加了两倍以上，并且植物在整个景观中的授粉服务提高了11.2％。那些位于高度城市环境中的植物从腐肉中获得了最大的好处，其授粉媒介数量最多，可行的结实种子比例最高。我们展示了人类发展如何通过改变授粉媒介社区和城市梯度范围内提供的授粉服务来促进非本地植物的繁殖。我们的发现具有基础和应用意义。第一，我们表明，具有复杂生活史的互惠物种可以在生态系统过程的各个层次之间提供渠道。其次，我们建议去除或减少幼虫的栖息地可能是中西部上层非原生伞形科植物管理的一种工具。