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EASTERN BEACHES FORESHORE RESERVES MANAGEMENT PLAN - COMMUNITY CONSULTATION OVERVIEW AND PROPOSED CHANGES (Referred from Planning and Environment Committee dated 8 August 2023 - Item 5.1) · Attachment 2 EBFRMP 2023 Draft - tracked changes
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Healthy dune systems absorb wave and wind energy and can reduce flooding, wind, and storm surge impacts. Dune vegetation helps hold dunes and foreshores together, making them more resilient to wind and wave erosion4. Dune vegetation slows the wind near the surface of the dune and allows sand to drop out of the air. This reduces wind impacts on the dunes and nearby settlements and recreational areas. Healthy dune systems are self-regenerating and can rebuild more easily after severe weather events, given enough time between storms and availability of suitable material for rebuilding. Dunes in good condition means that there are sources of seeds and runners nearby to recolonise disturbed areas after storm events. Vegetation and natural debris act as an entrapment point, allowing the lodgment of sand and seeds that contribute to the rebuilding and revegetation of frontal dunes after disturbance.5 Biodiverse, healthy vegetation on dunes means that the native vegetation remains more adaptable and resilient to any changes. We don’t yet know which species are likely to be more adaptable to changed climatic conditions, or more resistant to disease or new predators facilitated by climate change. Having a wide range of native species mixed in with each other means that change resilient species are more likely to be in place, and that the loss of some species is less likely to significantly reduce vegetation cover and be more easily recovered by remaining species. Sloping, healthy dunes help keep sand on our beaches. Waves run out on the natural slope, reducing the amount of energy available to lift and carry sand away. Steep dune faces left after storms soon slump, quickly returning the back of the beach to a more natural slope. Dunes are a source of sediment for offshore bars that develop after storms that then act as a local source of sediment to rebuild beaches and frontal dunes.6 Coastal hazards monitoringCoastal Monitoring Plan This data will inform future climate change mitigation actions and provide feedback on the outcomes of current and future management. Noosa Council has developed an integrated Coastal Monitoring Plan to map and monitor changes in Noosa’s coastline and dunes. Data from this monitoring will inform further coastal hazard monitoring and mapping and on-ground management decisions. EBFMPEBFRMP Management actions The following actions are identified for implementation: Prioritisation: • Immediate: < 1 year • Medium:1 year – 3 years • Long: 3 years – 5 years • Continuing: Commenced and ongoing. 4 Clark GF, Fischer M, Hunter C (2021). Coasts: Coastal ecosystems and habitats. In: Australia State of the environment 2021, Australian Government Department of Agriculture, Water and the Environment, Canberra, https://soe.dcceew.gov.au/coasts/environment/coastal-ecosystems-and-habitats, DOI: 10.26194/AANZ-RF46 5 De Battisti, D. (2021). The resilience of coastal ecosystems: A functional trait-based perspective. Journal of Ecology. 109 6 Lawlor, P., Jackson, D.W.T. (2022). A Nature-Based Solution for Coastal Foredune Restoration: The Case Study of Maghery, County Donegal, Ireland. In: Misiune, I., Depellegrin, D., Egarter Vigl, L. (eds) Human- Nature Interactions. Springer, Cham. Eastern Beaches Foreshore Reserves Management Plan 2023 Page 29
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