Coastal vs inland sensitivity to desertification: a diachronic analysis of biophysical and socioeconomic factors in Latium, Italy

The present study assesses the spatial distribution of a composite index of land sensitivity to desertification (called ISD) in the coastal area of Rome, including natural areas such as Castelporziano forest, compared with inland areas of Latium region, central Italy. Based on two partial indicators integrating 10 elementary variables (five biophysical attributes investigating climate, soil and vegetation, and five socioeconomic attributes assessing population pressure, changes in the use of land and human pressure), the ISD was calculated for two reference years (1970 and 2000) and at the municipal scale in Latium region. Results indicate a positive trend in the ISD in both coastal and inland areas with territorial disparities widening significantly over the studied period. Interestingly, coastal urban and peri-urban municipalities showed the highest growth rate in the ISD. These finding possibly reflects rising human pressure in lowland and coastal areas experiencing urbanization compared to internal hilly and mountain areas.