The MarLi (Marine Litter) project, in collaboration with local partners, aims to reduce plastic pollution along Ecuador’s coasts, thereby improving the long-term health of ecosystems. The focus is on developing an agent-based model of the mangrove forest ecosystem and human actors to analyze the effects of plastic pollution on resource use under various environmental conditions. This involves close collaboration with local users of the ecosystem. Ultimately, the project results are intended to help raise awareness of the critical link between ecosystem services and the level of pollution and to drive targeted actions to protect important natural resources.