The system of wetlands, swamps and rivers in the subregions of San Jorge and Mojana is a diverse ecosystem essential for the water regulation of the region.
The Sucre Tropical Dry Forest is a vital ecosystem that covers the municipalities of Colosó, Chalán, Toluviejo, Morroa and San Onofre. With its seasonal rainfall regime and temperatures between 18°C and 28°C, it is home to remarkable biodiversity.
The coastal marine ecosystem of Sucre encompasses the Gulf of Morrosquillo, including estuaries, coastal lagoons, mangroves, seagrass meadows, coral formations and beaches.