sustainability Article Economic Valuation of Benefits in Freshwater Ecosystems: Complex Wetlands System Belonging to the San Juan River in the Magdalena Medio Region, Colombia Lya Sierra 1,* , Wilmer Marin 2 , Luis Guillermo Castro 3 and Olga Lucía Hernández-Manrique 4 1 Department of Economics, Pontificia Universidad Javeriana de Cali, Cali 760031, Colombia 2 Independent Consultant, Bogotá 111161, Colombia;
[email protected] 3 School of Management, Universidad de Los Andes, Bogotá 111711, Colombia;
[email protected] 4 Alexander von Humboldt Biological Resources Research Institute, Bogotá 111311, Colombia;
[email protected] * Correspondence:
[email protected]; Tel.: +57-2321-8200 Abstract: This paper identifies and assesses the economic value of the main natural benefits relating to the complex system of wetlands (CSW) belonging to the San Juan River in the Colombian Magdalena Medio. This is a region rich in biodiversity and natural resources, which in the past was hit by violence and the actions of different armed groups. Benefit estimation takes into account diverse monetary valuation techniques, such as market prices for direct wetland uses and the transfer of benefits, for the assessment of indirect use and non-use values. The results reveal that the most important values relate to ecotourism (60.1%) as a possible future use of the CSW, the benefit of preventing flooding (28.4%), and the biodiversity that inhabits the area (6.7%). All three values Citation: Sierra, L.; Marin, W.; represent the total economic value of the CSW. This research also finds that the benefits of the Castro, L.G.; Hernández-Manrique, ecosystems currently provided by the CSW exceed the opportunity cost, represented by the total O.L.