Disentangling the effects of local and regional factors on weed community dynamics in agroecosystems

International audience; Ecological theories of community assembly have been used to understand and predict community structural changes in response to agricultural practices. This is a fundamental issue to design sustainable cropping system. Weed infestations are potentially an important threat to crop production. Factors affecting weed community composition and diversity have traditionally been studied at the within-field level, since it is generally assumed that the main drivers of weed dynamics are farming practices at this spatial scale. However, spatial dispersion and landscape characteristics may strongly impact weed diversity both at local and regional scales. Moreover, weeds can per…