The dynamics of the selected food webs will be described in oilseed rape fields over a period of two years with samples collected every month during the animals' period of activity in real farming conditions. The mechanisms underpinning the relationship between interaction networks and ecosystem services are still largely unknown. For example, if the biological control of aphids is improved by increasing floral resources in simplified landscapes, this is not always the case in more complex ones. Among the key variables that could explain this context-dependency, agricultural practices, distance from source populations and crop intensification are major elements. IMAgHo will take advantage of the Zone Atelier Plaine & Val de Sèvre (ZA-PVS), which offers a quasi-experimental context to decouple multiple environmental and management gradients and test their respective effect of food webs and regulatory services. The structure and connectedness of the food webs will be analysed in relation to historical data on agricultural practices and biodiversity, which have been recorded on the ZA-PVS for more than 25 years. The ZA-PVS also allows to perform field experiments through existing research partnerships with farmers. Field experiments will be implemented to test how changes in management modify food webs and the related regulation services, and ultimately affect yield. As well as generating fundamental ecological knowledge on ecosystem functioning, this project will produce operational guidelines to limit agrochemical inputs and enhance ecological intensification in agroecosystems.