There is a growing concern for natural resource conservation and their potential to provide Ecosystem Services (ES). For forest systems in particular, community forest management is conceived to promote forest management and conservation through intervention, monitoring, and surveillance activities undertaken by the same communities that inhabit the ecosystem and depend on them, directly or indirectly. This article proposes a system dynamics model to evaluate cooperation scenarios and decision-making in local communities dedicated to community forest management. The structure of the model is adapted to represent decision norms and cooperation scenarios that avoid deforestation, maintain forest conservation and, in turn, increase the provision of water as one of the most critical ES for the case of the La Loma ejido in the municipality of Rioverde, San Luis Potosí, Mexico.