1. Human well-being depends on ecosystems: Disaster resilient communities, especially in rural areas, are based on healthy ecosystems and diverse livelihoods. Healthy ecosystems are central to hazard mitigation by providing, for example, flood regulation and coastal protection and protecting steep slopes. They also increase the resilience of vulnerable people to withstand, cope with and recover from disasters resulting from hazard events such as droughts, hurricanes, earthquakes and others. This is because they provide many livelihood benefits, such as food, firewood, clean water, fibres, and medicine, resources communities require for resilience in the face of disasters and climate change. A degraded ecosystem is unable to provide these mitigation and resource benefits and therefore significantly increases human vulnerability.
2. Ecosystems such as wetlands, forests, and coastal systems can provide cost-effective natural buffers against natural events and the impacts of climate change. According to the World Bank (2004), investments in preventive measures, including in maintaining healthy ecosystems, is seven-fold more cost effective than dealing with the a disaster’s aftermath without any prevention efforts.
3. Healthy and diverse ecosystems are more resilient to extreme weather events. Intact ecosystems are less likely to be affected by, and more likely to recover from, the impacts of extreme events. However, disasters can affect ecosystems through habitat loss and species mortality and invasive species spread. Poorly designed post-disaster clean-up efforts can also negatively impact ecosystems and hinder progress toward achieving the objectives of the UN Convention on Biological Diversity and Millennium Development Goals.
4. Ecosystem degradation, especially when related to forests and peatlands, reduces the ability of natural ecosystems to sequester carbon, increasing the incidence and impact of climate change and climate related disasters.
5. Furthermore, human conflicts can cause devastation to communities similar to the effects of natural hazards and are often caused by competition over scarce natural resources. These conflicts cause further environmental degradation. Environmental management is therefore essential to both decrease risk of conflict and allow post-conflict recovery.