## 5 Results
Pollen diagrams that include a wide range of taxa (mainly opposing Arboreal Pollen (AP) and Non-Arboreal pollen (NAP)) are frequently produced to evaluate the opening of the forest. In Corsica, the dominant taxon during pre- or low- anthropized environments is Erica, as suggested by the invaluable research conducted by [PERSON] [69; 106]. The high representation of this taxon along the shore, reaching 60 to 80% of the total taxa, is indicative of undisturbed environments where climate forcing is the predominant factor controlling vegetation composition. In Early Neolithic times, representation of Erica decreased rapidly, and open forest vegetation prevailed [71], with the development of _Quercus_ _lix_[106]. Meanwhile, anthropogenic activities increased and are characterized by the development of pastoral activities within an open forest context, followed by cereal cultivation [71]. The freshwater wetland revealed in the Lower Sagone Valley (Section 4.1) records important agricultural practices: pastoral activities are well attested at the end of the Early Bronze Age (EBA) and during the MBA, with lower evidence during the LBA and FBA. Indeed, cereal cultivation appears during the MBA, but there is no evidence of this activity during the LBA and FBA based on the study of bioindicators (Figure 6). In this case, palynology has helped identify a clear human presence during the Bronze Age, despite the lack of known archaeological sites in this area. Taken together, the palaeogeographic reconstruction and vegetation history of the Sagone coastal plain reveal a completely different landscape configuration than today's and help to define past territories, in particular those of the Bronze Age. Questions regarding the environmental conditions that prevailed during the probable installation of the menhir status (presumed to date from the beginning of the FBA) deal with the existence of a freshwater wetland threatened by post-glacial sea-level rise and by frequent brief episodes of marine incursions. The latter may have altered water quality during the LBA. The subsequent increase of salinity may well have provoked a reduction in the size of the freshwater wetland, and at the same time, would have compromised the cultivation of crops, as is suggested by the decrease in Cerealia-type pollen, which began towards the end of the MBA [97]. To summarize,  
Figure 6: Synthetic pollen diagram reconstructed for the Lower Sagone Valley. palaeoenvironmental research conducted in the Sagone coastal plain posit the installation of the anthropomorphic statue menhires in close proximity to a freshwater water resource, presumably under environmental threat (alteration of water quality due to frequent haline inputs), and thus agree well with recent archaeological theories [98; 99]. The geoarchaeological approach adopted here was conducted at the scale of the palaeo-landscape feature (wetlands) and significantly contributes to enriching archaeological knowledge. It is evident that archaeological questions regarding present-day landscape configuration cannot be solved by archaeology alone, which justifies the need for a multidisciplinary approach based on borehole studies when investigating past Human-Environment interactions. The eastern coast of Corsica provides another example dealing with coastal geoarchaeology. In this area, several logoons and brackish ponds are seasonally disconnected from the sea. Both archaeological and historical evidence that could be used to document simultaneous early occupation and land use are scarce. In general, such information dealing with agricultural practices is largely dependent on the discovery of tools during excavations. However, little evidence has been uncovered about past farming activities in this area, even if the coastal wetlands were fertile lands and represented possibilities for cereal cultivation and grazing.