Evaluación ambiental integrada de áreas inscritas en el programa federal de Pago por Servicios Ambientales Hidrológicos. Caso de estudio: Ajusco, México

ES mapping was deployed with phes polygons and correspondence between sites on phes and areas with greatest potential for ES (except for an area of 236.7 hectares) was found. However, in many cases, the highest values of es not correspond to water resources, as they are more associated with vegetation and biodiversity (carbon stock in forestsand provision of habitat), which helps to conclude that the phes program should consider other variables and not be restricted to the es associated with hydrology. Two studies on quantifying forest cover were reviewed in the area (one covers from 1986 to 2010, with a projection to 2030 and the other from 2006 to 2014). The information regarding sites on phes Program and the result shows that deforestation has remained revised (although the rate decreased in the period 2006-2014) and deforested areas within enrolled in the program areas phes are greater than those who have not been. Although factors that could contribute to the process are identified, it is concluded that a program like phes implemented in an isolated manner, has no bearing on the problem of deforestation. Finally, the importance of obtaining the map “high priority areas for ecosystem services”, the most environmentally important areas are identified and this helps manage phes expanding areas and get other resources or protection status in areas with natural ecosystems.