Wild pollinator activities negatively related to honey bee colony densities in urban context

摘要: As pollinator decline is increasingly reported in natural and agricultural environments, cities are perceived as shelters for pollinators because of low pesticide exposure high floral diversity throughout the year. This has led to development environmental policies supporting urban areas. However, often restricted promotion honey bee colony installations, which resulted a strong increase apiary numbers cities. Recently, competition resources between wild bees been highlighted semi-natural contexts, but whether beekeeping could impact remains unknown. Here, we show that city Paris (France), visitation rates negatively correlated densities present surrounding (500m - slope = -0.614; p 0.001 1000m -0.489; 0.005). More particularly, large solitary beetles were significantly affected at 500m (respectively -0.425, 0.007 0.671, 0.002) bumblebees (slope 0.451, 0.012). Further, lower interaction evenness plant-pollinator networks was observed with within 1000 meter buffers -0.487, 0.008). Finally, tended focus their foraging activity on managed rather than spontaneous plant species (student t-test, 0.001) whereas equally visited species. We advocate responsible practices mitigating introduction density hives environments. Future studies needed deepen our knowledge about potential negative interactions domesticated pollinators.