Abstract
Humans depend on living things for their survival and quality of life, a dependency illustrated by the notions of " ecosystem services " or " nature's contributions to people ". In particular, pollinators are essential to our food supply, and to the agricultural production of many crop species. However, the abundance and diversity of pollinators in agricultural areas are threatened by intensive farming, the effects of which are well documented. These changes in pollinator communities in agricultural areas may have consequences for the pollination efficiency of these crops, but such consequences remain difficult to demonstrate. The lecture will present current knowledge on the mechanisms responsible for the erosion of biodiversity in agricultural areas, from the plot scale to the landscape scale, and even on an international scale.
