Ecosystems provide important services that can help people adapt to climate variability and change. Recognizing this role of ecosystems, several international and nongovernmental organizations have promoted an ecosystem-based approach to adaptation. We review the scientific literature related to ecosystem-based adaptation (EBA) with forests and trees, and highlight five cases in which forests and trees can support adaptation: (1) forests and trees providing goods to local communities facing climatic threats; (2) trees in agricultural fields regulating water, soil, and microclimate for more resilient production; (3) forested watersheds regulating water and protecting soils for reduced climate impacts; (4) forests protecting coastal areas from climate-related threats; and (5) urban forests and trees regulating temperature and water for resilient cities. The literature provides evidence that EBA with forests and trees can reduce social vulnerability to climate hazards; however, uncertainties and knowledge gaps remain, particularly for regulating services in watersheds and coastal areas. Few studies have been undertaken on EBA specifically, but the abundant literature on ecosystem services can be used to fill knowledge gaps. Many studies assess the multiple benefits of ecosystems for human adaptation or well-being, but also recognize trade-offs between ecosystem services. Better understanding is needed of the efficiency, costs, and benefits, and trade-offs of EBA with forests and trees. Pilot projects under implementation could serve as learning sites and existing information could be systematized and revisited with a climate change adaptation lens. 2012 John Wiley & Sons, Ltd.
How to cite this article:WIREs Clim Change 2012Change , 3:581-596. doi: 10.1002
INTRODUCTIONC limate change will affect human well-being in many parts of the world 1 and effective adaptation is needed even under the most stringent mitigation * Correspondence to: e. 2 The role of ecosystem goods and services in societal adaptation to climate variability and change has received renewed recognition. Ecosystem-based adaptation (EBA) is an anthropocentric approach, in which ecosystem services are conserved or restored to reduce the vulnerability of people facing climate change threats. 3,4 Ecosystem services are the benefits people obtain from ecosystems and can be classified as provisioning services (e.g., timber and firewood), regulating services (e.g., water regulation), and cultural services (e.g., recreation). 5 Examples of EBA include the restoration of mangrove shelterbelts for the protection of coastal settlements against storms and waves and the conservation of forested watersheds for the reduction of flood risk. Many international and nongovernmental conservation and development organizations have promoted EBA by stressing its effectiveness in reducing social vulnerability, its cost-efficiency, and its co-benefits for biodiversity conservation, poverty reduction, and climate change mitigation. [6][7][8][9][10][11][12] However, the ...