Managing Climate Extremes and Disasters for Ecosystems: Lessons from the IPCC SREX Report

This briefing, published by the Climate and Development Knowledge Network in 2012, synthesises key findings from the IPCC Special Report on Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation (SREX) specifically for ecosystem management. It examines the interplay between climate extremes, human vulnerability, and ecosystem resilience, advocating for ecosystem-based adaptation (EbA) as a cost-effective strategy to reduce disaster risk and support sustainable development.

• Healthy ecosystems are essential for reducing the impacts of climate extremes and disasters on human society. Examples include the use of forests in the Alps to mitigate avalanches, rock-falls, and landslides, and the use of mangrove replanting to buffer against cyclones and storm surges, which can reduce wind-generated wave energy by 70% to 90%.
• Climate change has already altered the frequency and severity of some extreme weather events in certain global regions based on data since 1950. While expected increases in extremes over the next two to three decades may be small relative to normal year-to-year variations, the effect of climate change will become increasingly significant as it becomes more dramatic.
• Extreme temperature events can significantly disrupt ecosystem functions and carbon cycling. For instance, a 2003 heat wave in Europe caused a 30% reduction in gross primary productivity, turning natural ecosystems into a strong net source of CO2 and reversing four years of net carbon sequestration.
• Disaster risk is driven by a combination of climate extremes and human factors, specifically vulnerability and exposure. High levels of vulnerability often result from skewed development processes, including failed governance, unplanned urbanisation, and environmental mismanagement.
• Increasing biological diversity within ecosystems enhances their resilience by allowing a wider range of responses to hazards. Conversely, non-climate stresses, such as overfishing and coral extraction in reef ecosystems, can reduce this resilience.
• Economic losses from weather and climate-related disasters are increasing, with annual estimates ranging from a few billion to approximately 200 billion US$ (in 2010 dollars), peaking in 2005 due to Hurricane Katrina. While absolute losses are highest in developed countries, fatality rates and losses as a proportion of GDP are higher in developing countries.
• Ecosystem-based adaptation (EbA) is presented as a cost-effective alternative to 'hard' engineering solutions, particularly for the rural poor. It integrates biodiversity and ecosystem service management into adaptation strategies to provide risk reduction and co-benefits for livelihoods.
• The document identifies several challenges to increasing investment in ecosystem-based solutions, including the inability to estimate the economic value of various ecosystem services, a lack of interdisciplinary implementation capacity, and a mismatch between geographic scales of administration and ecological mandates.
• Effective risk management requires a shift from incremental changes to transformational changes in institutions and processes. This includes moving away from a focus on individual events toward a broader change in culture and approach to disaster risk reduction.

APA

Cameron, C., Norrington-Davies, G., & Back, E. (2012). Managing Climate Extremes and Disasters for Ecosystems: Lessons from the IPCC SREX Report. Climate and Development Knowledge Network. http://cdkn.org/wp-content/uploads/2012/10/SREX-lessons-for-ecosystems.pdf

Chicago

Cameron, Catherine, Gemma Norrington-Davies, and Emma Back. Managing Climate Extremes and Disasters for Ecosystems: Lessons from the IPCC SREX Report. Climate and Development Knowledge Network, 2012. http://cdkn.org/wp-content/uploads/2012/10/SREX-lessons-for-ecosystems.pdf.

Wikipedia

{{cite report |last1=Cameron |first1=Catherine |last2=Norrington-Davies |first2=Gemma |last3=Back |first3=Emma |title=Managing Climate Extremes and Disasters for Ecosystems: Lessons from the IPCC SREX Report |publisher=Climate and Development Knowledge Network |date=2012 |url=http://cdkn.org/wp-content/uploads/2012/10/SREX-lessons-for-ecosystems.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{cameron2012managing, author = {Cameron, Catherine and Norrington-Davies, Gemma and Back, Emma}, title = {{Managing Climate Extremes and Disasters for Ecosystems: Lessons from the IPCC SREX Report}}, institution = {Climate and Development Knowledge Network}, year = {2012}, url = {http://cdkn.org/wp-content/uploads/2012/10/SREX-lessons-for-ecosystems.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }