Land conversion and intensive vegetation management are major drivers of shifts in insect communities, including economically valuable species. We evaluated the impact of lawns and meadows across agricultural, residential, and industrial landscapes in structuring bees, wasps, and flower flies communities. We carried out plant and insect inventories on 18 lawns and 18 meadows distributed evenly among agricultural, residential, and industrial landscapes within the Greater Quebec City region (Quebec, Canada). Insect sampling was conducted five times using bowl traps and entomological nets, from June to September 2020. Results indicate taxon-specific responses to landscape matrix and site maintenance. Agricultural landscapes negatively influenced bee abundance compared to urban areas, while the opposite trend was observed for flower flies. Wasp abundance and richness were negatively influenced by both agricultural and industrial matrices compared to residential landscapes. Regarding site maintenance, bees and wasps were 3 and 12 times more abundant and 2 and 6 times more species-rich, respectively, in meadows than in lawns as per the data aggregated across the sampling date. Flower fly abundance was higher in meadows than in lawns for agricultural and residential landscapes only, while richness was consistently higher (2 times greater) in meadows compared to lawns. Some species of the sweat bee genus Lasioglossum and the flower fly margined calligrapher (Toxomerus marginatus) were dominant in lawns, while meadows hosted a more balanced community among genera and supported pollinators with wide-ranging resource requirements. Our results suggest that conservation actions should consider both landscape and local management to conserve central-place foragers, such as bees and wasps, and for structuring flower fly species composition.

土地转变和集约化植被管理是昆虫群落（包括具有经济价值的物种）变化的主要驱动力。我们评估了草坪和草地对农业、住宅和工业景观对蜜蜂、黄蜂和花蝇群落结构的影响。我们对大魁北克市地区（加拿大魁北克省）内均匀分布在农业、住宅和工业景观中的 18 个草坪和 18 个草地进行了植物和昆虫清查。从 2020 年 6 月到 9 月，使用碗式陷阱和昆虫网进行了五次昆虫采样。结果表明了分类单元对景观基质和场地维护的特定反应。与城市地区相比，农业景观对蜜蜂丰度产生了负面影响，而花蝇则出现了相反的趋势。与住宅景观相比，黄蜂的丰度和丰富度受到农业和工业基质的负面影响。在场地维护方面，根据采样日期汇总的数据，草地上的蜜蜂和黄蜂的数量分别是草坪的 3 倍和 12 倍，物种丰富度分别是草坪的 2 倍和 6 倍。仅在农业和住宅景观中，草地中的花蝇丰度高于草坪，而草地中的花蝇丰度始终高于草坪（两倍）。汗蜂属Lasioglossum和花蝇缘书法家 ( Toxomerus marginatus ) 的一些物种在草坪中占主导地位，而草地上的属间群落更加平衡，并支持具有广泛资源需求的传粉昆虫。我们的结果表明，保护行动应考虑景观和当地管理，以保护中心地区的觅食者，例如蜜蜂和黄蜂，并构建花蝇物种组成。