SUMMARY
Ecosystem services play a fundamental role in society; their characteristics and the production of their natural generated capital are fundamental elements in the functioning of the support system of life on Earth. The loss of ecosystem services contributes to food and energy uncertainty, increases vulnerability to natural disasters, such as floods or tropical storms, decreases the level of health, reduces the availability and quality of water resources and affects cultural heritage. This study has conducted a quantitative estimate of ecosystem services and their evaluation for a wide, complex and sensitive area: The National Park of Cilento, Vallo di Diano and Alburni, in Southern Italy. The assessment has been undertaken via a preliminary, partial evaluation model and further through the TOPSIS method. Research results have led to a scenario highlighting a dualism on the territory shaped by the differences between internal and coastal areas, defining themselves as complementary and necessary to each other. To improve the sustainable use of territorial resources, it is necessary to adopt policies and strategies from those that are available, always taking into account any possible conflict between conservation and development.