Investments in ecosystem-based adaptation (EbA), which usually entails building ecological infrastructure, will generate benefits for society for decades. EbA projects funded by governments or donors typically run for 5 years, or at the most 10 years, and consequently require detailed exit strategies to ensure effective maintenance of the infrastructure beyond their closure dates. The financial and operational arrangements for such maintenance will vary according to the social, economic and biophysical contexts of a particular site. The nuances and details of these contexts that are important for designing an effective exit strategy are, invariably, not available at the start of an EbA project. As a result, it’s crucial that EbA project managers are actively collecting information from early on in the project to refine the exit strategy presented in the project document. As new information comes to light over the course of the project, the exit strategy will need to go through numerous iterations, with the ultimate end goal being a set of plans that can be easily implemented after the grant funding period has ended. Examples of lessons learned from the three EbA South countries, namely the Republic of Seychelles, Islamic Republic of Mauritania and Nepal, are presented below.
In the case of the Seychelles, mangrove, marshes and riverine vegetation were restored through planting of tree seedlings at 10 sites on three different islands. At the outset of the project, it was not anticipated that major investments of time and resources would be required after the seedlings had been planted. The assumption was that the ecosystem would be self-sustaining as long as direct damage to trees, like harvesting for fish traps and other construction purposes, did not occur. The risk of tree harvesting at the project sites was deemed negligible and consequently an exit strategy was not one of the main foci at the outset of the project. Unanticipated long-term threats did, however, emerge in the last year of the project. At one site, landscaping and maintenance contractors cut down several hundred of the project’s tree seedlings during road maintenance work, despite the seedlings being more than ten metres away from the roadside. At other sites, alien weedy plants, mangrove crabs and giant tortoises damaged the project’s tree seedlings more extensively than had been expected. The exit strategy for the project required enhanced communication protocols between government and the Landscape and Waste Management Agency to prevent damage to the trees by roadside maintenance teams. It also required long-term agreements with government and non-governmental organisations to safeguard the project’s tree seedlings until the trees are large enough to withstand pressures from alien plants, crabs and tortoises.
Red clawed mangrove crab (Perisesarma bidens) in the Seychelles. This crab frequently damaged the mangrove seedlings planted within the EbA South project.
In the case of Mauritania, where degraded dryland ecosystems were restored by planting indigenous trees, the extent of adaptive management that was required during the project implementation was not anticipated. For example, local politics required changes in project sites, with some of the new sites requiring fencing to protect tree seedlings from livestock. The shift in project sites also meant that planting of tree seedlings continued right up to the point of closure of the project instead of a year before closure. The exit strategy for the project consequently needed to be revised to include a long-term commitment from government to maintain the project’s fences and a short-term commitment to water seedlings for several months after project closure until they were established. It is likely that government will follow through on these commitments because the project’s sites were on state-owned land and the government recognised the value of the EbA investment in the land. In retrospect, it would have been preferable to invest the time and resources well in advance of the closure of the project to obtain a written agreement with the government, specifying the anticipated activities and costs over a period of decades. This exercise would also have raised awareness of how the EbA benefits will accrue for future generations and need to be managed by government accordingly.
 Ecological infrastructure is the solid mass of biomass (roots, stems, leaves, lichen, fungi, fauna) and soil carbon that make up an ecosystem and provide a host of ecosystem services to society (e.g. provision of clean water, fruits, fibre, medicine, timber, fodder).
 An exit strategy provides details on how the ecological infrastructure will be maintained through time. Importantly, funding for the maintenance is required. It is preferable that such funding is acquired through domestic sources because the new ecological infrastructure is a national asset. However, it is noted that further international funds may be necessary for maintaining the assets until such time that the local government is fully sensitised and aware of the value of these assets.