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What Evidence Exists on the Effectiveness of EbA ?

What Evidence Exists on the Effectiveness of EbA ? . Dilys Roe, International Institute for Environment and Development Nathalie Doswald (UNEP-WCMC) , Rob Munroe (Birdlife International) Hannah Reid (IIED) Tom Spencer, Iris Möller , Bhaskar Vira (University of Cambridge).

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What Evidence Exists on the Effectiveness of EbA ?

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  1. What Evidence Exists on the Effectiveness of EbA? Dilys Roe, International Institute for Environment and Development Nathalie Doswald (UNEP-WCMC), Rob Munroe (Birdlife International) Hannah Reid (IIED) Tom Spencer, Iris Möller, Bhaskar Vira (University of Cambridge)

  2. Background to study • Lots of anecdotal evidence available that EBA is a “good thing” • However: • very few quantitative studies; • few with any kind of control situation or counterfactual or before and after analysis • few studies on the cost-effectiveness • No systematic synthesis • Evidence base needs improving/strengthening for informed decision-making • Existing evidence needs reviewing

  3. Study Methodology • Systematic Review: • What evidence exists regarding the ability of ecosystem-based approaches for adaptation to help people adapt to the impacts of climate change? • What are the critical knowledge gaps in the evidence? • Reviewed 132 journal articles and 32 grey literature case studies • Interrogated each piece of evidence against a standard set of questions exploring issues such as the climate hazard/impact addressed, ecosystem type, adaptation target, social economic and environmental costs and benefits . • Not aiming to determine whether EBA effective or not but report extent and description of evidence

  4. Results – geographic coverage

  5. Results – ecosystems being used

  6. Results – climatic hazards / impacts Main impacts addressed in the evidence for EbA effectiveness (*Loss of productivity of agriculture, fisheries, husbandry and forestry)

  7. Results – adaptation approach

  8. Results: costs and benefits of EbA

  9. Is EbA Effective? • Many characterisations of what is successful adaptation. • “any adjustment that reduces the risks associated with climate change, or vulnerability to climate change impacts, to a predetermined level, without compromising economic, social and environmental sustainability” • Tentatively, the evidence suggests YES...

  10. However: Key gaps in evidence • more detailed comparisons between EbA and alternative adaptation strategies, taking into account, social, environmental and economic considerations; • discussion of thresholds, boundaries and tipping points across a range of EbA, in varying climatic zones; • more attention to costs as well as benefits; • greater consideration of the temporal and spatial aspects of EbA effectiveness; • more strategic monitoring of existing EbA projects.

  11. THANK YOU

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