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Environment
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Evaluate and optimise cost and energy effective solutions for lighting, carbon delivery and mixing in intensive commercial scale tetrasporophyte production of Asparagopsis

Project number: 2023-188
Project Status:
Current
Budget expenditure: $100,009.00
Principal Investigator: Sasi Nayar
Organisation: Flinders University
Project start/end date: 30 Apr 2024 - 28 Mar 2025
Contact:
FRDC
TAGS
Seaweed

Need

This project seeks to improve process efficiencies in inoculum production systems in hatcheries and mass culture grow out systems in land-based seaweed aquaculture facilities through selection of light sources with the appropriate spectral qualities and intensities as well as efficient carbon delivery and mixing systems. Laboratory scale optimisation trials on tetrasporophytes of A. armata and A. taxiformis will be validated under scaled-up industrial scale systems. The project proposes to trial various commercially available light sources as well as carbon delivery systems that the industry could adopt.

Objectives

1. Comprehensive review of spectral quality and intensity of photosynthetically active radiation (PAR), carbon delivery and mixing in high density mass cultures of the tetrasporophytes of Asparagopsis
2. Validated spectral quality and irradiance in high density tetrasporophyte cultures of A. armata and A. taxiformis
3. Developed optimised carbon delivery and mixing systems in tetrasporophyte mass cultures
4. Laboratory-scale trials validated under scale-up conditions.
People
Industry

Investigating drivers of environmental change in Pipe Clay Lagoon

Project number: 2023-176
Project Status:
Current
Budget expenditure: $38,400.00
Principal Investigator: Carryn Manicom
Organisation: Marine Solutions Tasmania Pty Ltd
Project start/end date: 15 Sep 2024 - 29 Jun 2025
Contact:
FRDC
TAGS
Wild Catch
Recreational Fishing
Rac Tas
Climate Change
Aquaculture

Need

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.

Objectives

1. Characterise and quantify environmental changes in Pipe Clay Lagoon, providing an evidence base for anecdotal observations of change.
2. Understand the drivers and interactions behind observed environmental changes in Pipe Clay Lagoon.
3. Identify management mechanisms to safeguard the values of Pipe Clay Lagoon and other Tasmanian coastal lagoons, including sustainability of the aquaculture industry.
4. Capacity building and increased marine literacy within community and industry to help observe and report change.
5. The applicant would welcome feedback and suggestions from FRDC and/or key beneficiaries for additional objectives.
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