Organic farming improves the spatiotemporal stability of pollinator species richness

The spatiotemporal stability of the biodiversity of service providers such as insect pollinators is critical to guarantee high and stable levels of ecosystem services in agroecosystems. The proportion of semi-natural habitats (SNH) in the landscapes has been shown to stabilize the species richness of pollinators but the effect of farming intensity has not yet been studied. In this study, we compared the temporal and spatial stability of two groups of pollinating insects (butterflies and bumblebees) between nine conventional and ten organic farms, distributed along a gradient of landscape complexity. We surveyed pollinator communities and local flower cover during the growing season, along t…