Molecular evidence for recent land use change from a swampy environment to a pond (Lorraine, France)

► Sedimentary record was used to reconstruct the paleoenvironmental history of a pond. ► Sources of natural OM and changes in depositional conditions were identified from organic ratios. ► Recent land use changes were evidenced in catchment area from organic ratios and pollen. ► Fish ponds could be used to study environmental changes in a small watershed.