Abundance of weeds and seeds but not of arthropods differs between arable habitats in an extensive Mediterranean farming system

Agricultural intensification has profoundly affected European farmlands in the last decades, and their associated biodiversity has undergone a widespread decline. Although largely considered by farmers to be a threat to crop productivity, weeds and arthropods are key factors in farmland ecosystems and provide multiple ecosystem services. We analyze variations between three arable habitats—cereals, plowed and fallow fields—in the biomass of...