Environmental and land-use changes in a Mediterranean landscape: palynology and geoarchaeology at ancient Metapontum (Pantanello, Southern Italy)

The paper presents the results of palynological and geoarchaeological investigation carried out on the Greek- Roman site of Pantanello – ancient Metapontum – in the Metaponto Plain (southern Italy). This area, archaeologically investigated since the ‘70s, is an example of the long-term interaction between human communities and the environment. A total of 29 pollen samples and 43 bulk samples for sedimentological and mineralogical analyses were collected from three 2-m-deep trenches excavated in the vicinity of the archaeological complex of Pantanello and the alluvial plain of the Basento River. Our multidisciplinary investigation permitted to elucidate the main natural and human-controlled sedimentary processes that took place in the last two millennia. Large part of sedimentation occurred in fluvial environments and led to the accumulation of fine and organic matterrich deposits. This happened in alluvial to swampy environments at the margin of the Basento River plain. Since the Greek occupation of the area, human communities contributed to the sedimentation with different degree of intensity. In fact, human agency (herding and cultivation) tuned the intensity of soil erosion and slope processes, thus activating the colluvial mobilization of coarse sediments into the sedimentary sequence. Pollen analyses allowed exhaustive landscape reconstructions of the site, giving specific details on the land use and its transformations during the Greek and Roman phases. The increased human exploitation of the area altered the intensity of surface processes (erosion and sedimentation) and the evolution of plant cover promoted by natural dynamics.