Kelps are in global decline due to climate change, including ocean warming. To identify vulnerable species, we need to identify their tolerances to increasing temperatures and whether tolerances are altered by co-occurring drivers such as inorganic nutrient levels. This is particularly important for those with restricted distributions, which may already be experiencing thermal stress. To identify thermal tolerance of the range restricted kelp Lessonia corrugata, we conducted a laboratory experiment on juvenile sporophytes to measure performance (growth, photosynthesis) across its thermal range (4 – 22 °C). We found the upper thermal limit for growth and photosynthesis to be ~ 22 – 23 °C, with an optimum of ~ 16 °C. To determine if elevated inorganic nitrogen availability could enhance thermal tolerance, we compared performance of juveniles under low (4.5 µmol/day) and high (90 µmol/day) nitrate conditions at and above the thermal optimum (16 – 23.5 °C). Nitrate enrichment did not enhance thermal performance at temperatures above the optimum but did lead to elevated growth rates at the thermal optimum 16 °C. Our findings indicate L. corrugata is likely to be extremely susceptible to moderate ocean warming and marine heatwaves. Peak sea surface temperatures during summer in eastern and northeastern Tasmania can reach up to 20 – 21 °C and climate projections suggest that L. corrugata’s thermal limit will be regularly exceeded by 2050 as south-eastern Australia is a global ocean-warming hotspot. By identifying the upper thermal limit of L. corrugata we have taken a critical step in predicting the future of the species in a warming climate.

This record provides an overview of the NESP Marine and Coastal Hub project "Advancing national standards and best practices to monitor key marine values and pressures". No data outputs were generated by this project. -------------------- Standardised approaches to marine monitoring are critical for ensuring data consistency, transparency, and comparability across time, regions, and sectors. The development and application of national standards and best practices provide the foundation for monitoring the condition of Australia’s marine estate. As pressures on the marine environment increase, so too does the need for robust, inclusive, and nationally consistent monitoring practices. This project advanced the development and implementation of national best-practice standards to monitor the condition of priority values and pressures across Australia's marine estate. It built on previous work conducted by the NESP Marine Biodiversity Hub through the release of Version 3 of the Field Manuals for Marine Sampling to Monitor Australian Waters. This version introduced three new manuals for: (1) sampling microplastics in marine and coastal environments; (2) conducting knowledge, attitudes and practices (KAP) surveys with recreational marine users; and (3) use of the Benthic Observation Survey System (BOSS), a novel multi-camera drop platform for benthic imagery. Indigenous partners contributed to the development of the KAP and BOSS manuals, laying the foundation for future Indigenous-led monitoring initiatives. The project identified key barriers to adoption of the field manuals and developed a set of recommendations, included nominating the manuals for international endorsement, establishing governance mechanisms, securing long-term funding, and identifying priorities for future SOP development, such as offshore renewable energy monitoring. All materials were aligned with the Ocean Best Practices System to facilitate national and international uptake. A practical implementation plan was developed to guide the future development and maintenance of national standards; promote their broader adoption; and assess their effectiveness and impact in delivering priority monitoring activities. Outputs • Workshop and questionnaire report gauging the needs of scientists, Indigenous communities, and marine managers [written] • Scientific publication on marine best practice development [written] • New national standards for (1) drop cameras; (2) socioeconomic surveys; and (3) microplastics studies [written] • Implementation plan (final report) [written]

This record provides an overview of the NESP Marine and Coastal Hub Research Plan 2023 project "Informing southern right whale management through continued monitoring, determination of aggregation areas and development of approaches to increase data flow efficiencies and utility". For specific data outputs from this project, please see child records associated with this metadata. -------------------- This project will deliver priority information on southern right whales to address key knowledge gaps through: (i) updating long-term population abundance trends via aerial surveys of the western population and testing of platforms for improving photo-identification data flow efficiencies; (ii) the collection and utilisation of photos of the western population to identify biologically important reproductive areas and inform the estimation of population parameters;(iii) development of integrative methods for combining opportunistic and more formally collected observations, to expand the utility of datasets and (iv) collection of movement and genetic data to assess the connectivity and population identity of whales at the boundary of the eastern and western subpopulations. It will also conduct a consultative process for prioritising future work for informing future NESP work. Outputs • Updated southern right whale population assessments [dataset] • Individual whale photo-identifications in aggregation areas [image catalogue] • Updated SPRAT and BIA distributions [dataset] • Whale movement tracking [dataset] • Genetic data (for estimates of population connectivity) [dataset] • Final project report [written]

This record provides an overview of the NESP Marine and Coastal Hub Research Plan 2023 project "Assessing changes in black rockcod abundance and size". For specific data outputs from this project, please see child records associated with this metadata. -------------------- The Black Rockcod (Epinephelus daemelii) is a large, reef-dwelling species that can live for more than 60 years. In Australia it occurs along the coast of New South Wales, including at Lord Howe Island. Black Rockcod populations have been significantly reduced here due to overfishing, accidental hooking, and loss or degradation of estuarine and intertidal nursery habitats. As a result, the species is listed as Vulnerable under Commonwealth and NSW legislation. Despite having been protected from fishing in NSW since 1983, Black Rockcod are still taken illegally, or caught incidentally and released, which can lead to mortality post-release from embolism. Long-term population monitoring is a high priority identified by the species’ recovery plan and the NSW Fisheries Scientific Committee. In 2010, a broadscale baseline survey (81 sites) was undertaken in northern NSW and Lord Howe Island, followed by smaller surveys every four to five years. This project repeated the initial 81 baseline site surveys to assess if protection measures, such as marine protected area sanctuary zones, are assisting in recovery of black rockcod. This contributed to a 13-year time series (2010 – 2023) that was used to examine distribution and population structure of rockcod to assess if recovery actions being implemented are effective. Outputs • underwater visual census (UVC) data for black rock cod [dataset] • Final project report [written]

This record provides an overview of the NESP Marine and Coastal Hub Research Plan 2023 project "Guiding research and best practice standards for the sustainable development of Offshore Renewables and other emerging marine industries in Australia". For specific data outputs from this project, please see child records associated with this metadata. -------------------- Australia is entering a phase of rapid development of offshore renewable energy (ORE) projects and there is an immediate need to ensure these developments occur in a socio-ecologically sustainable manner. This project used a systematic approach to identify existing environmental and cultural data and best-practice monitoring standards to inform the sustainable development of ORE projects (primarily wind) in Australia and enabling regulatory decisions to be compliant with Environment Protection and Biodiversity Conservation (EPBC) Act and the Offshore Electricity Infrastructure (OEI) Act requirements. Focus areas of the data inventory were: • Seabed geomorphology and habitat characterisation. • Interactions with oceanography; eg the potential influence on coastal processes including sediment transport. • Interacting species and habitats; eg seabirds, shorebirds and migratory terrestrial birds, mammals, fish, sharks and rays, and invertebrates. • Potential impacts of installation, operation, and decommissioning; eg habitat modification (including dredging/impact to wetlands), installation noise, ongoing noise and electromagnetic fields, vessel activity, collision risk and barrier effects on birds. • Monitoring needs and associated best practices. • Indigenous communities affected by ORE development areas. This project ran in conjunction with a second project (https://www.nespmarinecoastal.edu.au/project/3-21) that addressed the immediate priorities of regulators, with a focus on the confirmed area of declaration for ORE off the east Gippsland coast, Victoria. Critical to informing the direction and focus of both these projects was guidance from an ORE Program Steering Committee comprised of representatives from relevant sections within DCCEEW, NOPSEMA, and MaC Hub partners involved in the project. Outputs • Inventory of existing information and associated sources for the following thematic areas: seabed geomorphology and habitat, oceanography, species and habitats, affected indigenous communities, ongoing monitoring needs and associated best practices, potential impacts of installation and operation [data inventory] • Final project report [written]

This record provides an overview of the NESP Marine and Coastal Hub project "Evaluation of recreational fishing behaviour, use, values and motivations that relate to compliance". No data outputs were generated by this project. -------------------- Recreational fishing is an important leisure activity in Australia that delivers important social and economic benefits to the community. As the largest and most widely dispersed natural resource-based recreational activity in the country, it is subject to management strategies including bag limits, quotas, and no-take zones. Given the prohibitive cost of deploying compliance officers to monitor Australia’s vast marine estate, strategies are needed to encourage voluntary compliance from fishers. This project explored behavioural interventions to promote self-compliance among recreational fishers, focusing on no-take zones within the Great Barrier Reef Marine Park and two Commonwealth parks off Western Australia (Geographe and Two Rocks). The research distributed more than 800 online surveys, followed up by focus groups and analysis to examine how demographics, motivations and fishing patterns influence fishers' intentions to comply with zoning rules. Survey insights were used to pilot a new targeted approach to awareness campaigns. Using behavioural segmentation, the project tailored messaging to specific audience types and tested these via GBRMPA social media channels. The project also examined perceptions of compliance visibility and found fishers were more likely to comply when uniformed officers were present and engaged directly at ramps or on water. The project outcomes provide a foundation for evidence-based behavioural interventions and targeted communication campaigns. It delivers a proof of concept for scalable, audience-specific behaviour change approaches that can be refined, implemented, and evaluated in future research. Outputs • Fact sheet - characterising recreational fishing population [written] • Final project report [written]

This record provides an overview of the NESP Marine and Coastal Hub Research Plan 2023 project 3.7 – Identifying and overcoming barriers to coastal and marine habitat restoration and Nature based Solutions in Australia. All outputs of this project are written (i.e. no data outputs). -------------------- There is an increasing need for and investment in coastal and marine restoration around Australia to help manage habitat and biodiversity loss, water quality, coastal inundation and erosion, and blue carbon assets. These projects are undertaken by a range of Commonwealth, state and local government agencies, NGOs, and community groups, and range across different habitat types and scale. However, a number of barriers currently preclude widespread uptake and implementation of habitat restoration and nature-based solutions (NbS) in Australia, which centre on: 1) policy and legislative barriers; 2) engineering adoption of NbS; and 3) Aboriginal and Torres Strait Islander inclusion and co-design. Overcoming barriers to marine and coastal restoration, and Nature-based Solutions (NbS) adoption is critical to safeguarding Australia’s marine estate. We focus this research on three thematic areas that represent roadblocks and opportunities for more inclusion in implementing and scaling-up restoration and NbS: 1. Engaging policy and permitting regulators to identify and breakdown barriers for marine and coastal habitat restoration; 2. Understanding and up-take of NbS by the engineering sector; and 3. Inclusion of Aboriginal and Torres Strait Islanders in restoration and NbS This research was conducted through in person and virtual workshops, with the outcome being advancement of effective approaches to overcome these challenges. Outputs • Identifying and overcoming barriers to marine and coastal habitat restoration and nature-based solutions in Australia [project summary - written] • A blueprint for overcoming barriers to the use of nature-based coastal protection in Australia [written] • Legislative permitting processes for restoration [written] • Pathways to Aboriginal and Torres Strait Islander inclusion and co-design in restoration [written]

Repeat surveys of aquatic flora were conducted in Princess Royal Harbour in 1996, 2003, 2005 and 2006. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water. The objectives of the study were to map the distribution of the different seagrass species found in Princess Royal Harbour and Oyster Harbour and to compare the distributions with that observed in previous studies (1996 and 2003). This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in January and March 2021 by the Department of Water and Environmental Regulation as "Princess Royal Harbour Seagrass Survey". The datasets making up the 1996-2006 Princess Royal Harbour seagrass survey data are: WA_PrincessRoyal_seagrass_polygons - polygon dataset showing interpolated percentage cover of seagrass. This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.