Ports worldwide operate at the interface of coastal infrastructure and sensitive marine habitats, requiring collaborative environmental stewardship. This presentation highlights outcomes from the Channel Upgrade Seagrass Monitoring Program (2019–2024), established to assess potential impacts of a 3.6 million m3 capital dredging campaign associated with the Port of Townsville Channel Upgrade Project.
Long-term and project-specific monitoring across Townsville, Cleveland Bay and Magnetic Island integrated seagrass condition indicators, water quality data, and environmental drivers within a co-designed industry–research partnership. Results showed a regional decline in seagrass condition between 2019 and 2024. The integrated program identified this was primarily driven by reduced light availability and temperature extremes associated with cumulative meteorological events, not because of capital dredging activities. Declines occurred across areas both within and outside the capital dredging ‘Zone of Influence’, including at reference sites, demonstrating broader environmental influences and highlighting the importance of long-term, regional monitoring frameworks for impact assessment.
This case study demonstrates how collaborative monitoring, adaptive management, and transparent science–industry partnerships can support sustainable port development and future-ready coastal infrastructure.