Coastal lagoon systems in Tasmania form a fundamental part of coastal ecosystems. Healthy lagoons support local biodiversity, and play a key role in nutrient cycling and flood protection. They provide opportunities for sustainable aquaculture, fishing and tourism, while also being appreciated for their recreational amenity and cultural values. Sustainable management of coastal lagoons is essential to environmental and socioeconomic development.

There is limited information about the ecosystem drivers that are influencing the changes being observed in Pipe Clay Lagoon, leading to knowledge gaps in decision making tools and monitoring strategies required to identify and mitigate these changes. The proposed application is a multifaceted approach to investigate the environmental drivers of change in Pipe Clay Lagoon. The findings can then be used to provide valuable guidance for the management and conservation of other coastal lagoons in Tasmania facing similar challenges, providing a model for proactive monitoring and ongoing sustainability.

The FRDC has a responsibility to ensure that research is undertaken to assist in the management of fisheries and aquaculture resources for ongoing sustainability. The changes being experienced in Pipe Clay Lagoon will have implications on the availability and suitability of the lagoon as a sustainable aquaculture site. The planned approach and objectives of the application align with the FRDC’s R&D Plan for 2020-2025 through:

- Building people's capacity and capability
- Ensuring that resulting knowledge and innovation is adopted for impact through awareness of the needs of the ‘adopter’, local context and effective networking
- Continual improvement and collaboration of industry and community to deliver competitive advantage, healthier ecosystems and community support
- Provision of foundational information

Equally and importantly the application aligns with the NRM Strategy for Southern Tasmania 2030 for Pipe Clay Lagoon and similar systems in that wetland health is improved for socio-economically important systems by working with key partners and encouraging investment in monitoring, land and water management practices and on-ground works.
The enthusiasm of those engaged in the stakeholder consultation process was a strong indication of the need, interest and urgency of the application.

The HIMI bioregion supports significant marine conservation values as well as a highly sustainable, and valuable commercial fishing industry. Typically, marine parks/reserve development processes are tasked with developing marine spatial planning arrangements that achieve a balance between preserving conservation values of the area and maintaining/promoting human activities through the principles of Ecologically Sustainable Development (ESD). However, key uncertainties remain regarding the policy priorities and how the final design of marine parks are objectively determined.

This project will provide an independent assessment of the framework used for original design of the HIMI Marine Reserve in 2002, the review in 2014, and the current review to provide recommendations for future development. The project will also explore how/if the policy objectives have been achieved since inception . Furthermore, this project will explore the potential of a quantitative risk-based approach to provide for minimising the uncertainties in the Marine Protected Area (MPA) development processes and deliver an objective framework.

In addition, the project will explore the current HIMI marine reserve framework, the associated commercial fishing industry arrangements and how they intersect with regard to:

Regulation
• Regulatory processes to minimise impacts of commercial fishing
• Legislative framework currently in place for Ecological Risk Assessment/ESD, Ecosystem-Based Fisheries Management, bycatch policy strategic research plans
• Marine Protected Areas review processes
• Statutory Fishing Rights (SFRs)

Economic impacts
• Commercial fishing viability
• Statutory fishing rights
• Permitted fishing gear types – (e.g. potential removal of MSC certified trawl fisheries with additional implications on research activity)

Biological impacts
• Impact on juvenile toothfish index of abundance and icefish estimates – accuracy of tracking stock will be significantly reduced if ability to trawl is removed (i.e. random stratified trawl survey impacted)
• Stock assessment model ability to consider toothfish population structure if longline fishery further constrained
• Climate change and effects of population shift
• Increasing policy position of MPAs as fisheries management tools
• Increased localised depletion and constrained ability to distribute commercial fishing effort

Social Impacts
• Market access
• Community sentiment