Limits to climate change adaptation in floodplain wetlands: The Macquarie Marshes
|Title||Limits to climate change adaptation in floodplain wetlands: The Macquarie Marshes|
|Year of Publication||2011|
|Authors||Jenkins, KM, Kingsford, RT, Wolfenden, BJ, Whitten, S, Parris, H, Sives, C, Rolls, R, Hay, S|
|Institution||National Climate Change Adaptation Research Facility|
|Keywords||ecology, environmental flows, New South Wales, NSW, refugia, restoration, semi-structured interviews, social, synthesis and integrative research, workshop|
This report identifies the likely risks, impacts of climate change, adaptation strategies and limits for the ecological and social communities of the Macquarie Marshes. The ecological community includes waterbirds, vegetation, fish, invertebrates, carbon cycling, woodland birds and frogs. The socio-economic dimension identifies wetland values, indigenous values, grazing, irrigation and recreation. Adaptation strategies include: migration, environmental flow allocations, water savings, restoration of deep pools, protection of core refugia, dam reoperation and options to store extra water for low flows. Adaptation limits include: ecological, physical, economic, technological and social dimensions estimated based on the adaptation strategies.
• We reviewed literature for climate change adaptation in floodplain wetlands.
• We identified risks and thresholds for key biota.
• We developed climate change scenarios for the Macquarie Marshes.
• We tested these scenarios in a stakeholder workshop and in interviews with landholders.
• The key stressor of climate change in the Macquarie Marshes is the loss of flooding, but the impact of water regulation on loss of flooding is far greater than that which is projected with climate change by 2030 under any scenario.
• Based on the literature we identified two autonomous adaptations, 4 physical adaptations, 7 institutional/political adaptations and 8 land management adaptations. Most of these actions are at varying stages of application to counter impacts of loss of flooding due to regulation.
• Stakeholders identified 16 high priority adaptations in a workshop and discussed their limits and implementation.
• Water buy-back and environmental flows are key adaptations, but also developing an adaptive management plan, social capital, responsive institutional frameworks and preserving free-flowing rivers.