What is ecosystem restoration?
Restoration can be defined as re-establishing the pre- sumed structure, productivity and species diversity that was originally present at a site that has been degraded, damaged or destroyed. In time, the ecological processes and functions of the restored habitat will closely match those of the original* habitat (SER, 2004; FAO, 2005).
The concept of landscape restoration tackles the broader range of issues and needs via a landscape-scale approach, “a planned process that aims to regain ecological integrity and enhance human wellbeing in deforested or degraded landscapes” (WWF International 2007).
Reclamation aims to recover productivity (but little of the original biodiversity) at a degraded site. In time, the protective function and many of the original* ecological services may be re-established. Reclamation is often done with exotic species but may also involve native species. (WWF/IUCN 2000)
The objective of rehabilitation is to re-establish the produc- tivity and some, but not necessarily all, of the plant and ani- mal species thought to be originally* present at a site. (For ecological or economic reasons the new habitat might also include species not originally present at the site). In time, the protective function and many of the ecological services of the original habitat may be re-established (FAO 2005).
Regeneration is often viewed as the growth or re-emergence of the native species in a place after it has been destroyed or degraded, resulting from the protection of an area from biotic interference. Regeneration may come about naturally or result from human intervention (CFIOR websites).
Recovery of a habitat is linked to the ecological succes- sion of a site. That is the site returning naturally to the state it had been before it had been degraded or destroyed without any intervention from humans (CFIOR websites).
* While restoration-related definitions often focus on ‘original’ habitat cover, it may be more appropriate in the future to focus on restoring resilient natural habitats, for example through paying attention to con- nectivity and dispersal, rather than assuming that all ‘original’ species will persist under changed conditions. From this point of view, ‘poten- tial’ would be substituted for ‘original’ in the above definitions.
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