The document discusses efforts to restore degraded mangroves and salt marshes near the mouth of the Brisbane River. SEQ Catchments has used innovative techniques like installing rocks to delineate the intertidal zone and prevent vehicle access, allowing the plants to recover. They also built rock groynes and beaches to protect the riverbank from erosion. A variety of methods were used to establish salt marsh, mangroves, and seedlings to encourage natural regeneration of these important ecosystems.