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In Brittany, there is an underlying trend towards fewer, larger, more dispersed livestock farming systems (linked to land constraints), with an increasing share of annual sales crops, and fewer farmers. Based on fine-scale studies with farmers, we have shown how these joint evolutions influence the choices and spatial organization of land-use patterns, as well as the management of semi-natural elements such as hedges, and hence their assembly into landscape mosaics of different types and levels of ecosystem functionality. In this project, using data from the RPG and RA, and data from remote sensing, we aim to produce an assessment of the effects of recent changes in agricultural structures on landscape mosaics at regional scales in Brittany, useful for dialogue on the levers of agroecological transitions in territories.