Coral transplantation has been used in reef restoration for several decades, but information on the type of projects, their scope, scale, and success is mostly limited to published scientific studies and technical reports. Many practitioners do not have the capacity to share their progress in peer-reviewed literature, yet likely have a wealth of information to share on how to improve the efficiency of transplantation efforts. In order to incorporate non-published data on coral transplantation projects and gain an overview of the general features of these projects, we conducted an initial systematic online survey of projects run by various practitioners. Surveyed projects (n = 50) covered most of the tropical belt and ranged in size from a few hundred transplanted corals to >5000 transplants. The most frequent source of coral fragments were corals already broken from some previous impact (“corals of opportunity”; 58% of projects), followed by fragments stored in different types of aquaculture systems (42% of projects). The use of sexual reproduction was very limited. Fast-growing, branching corals were used in 96% of projects, being by far the most common transplanted growth form. About half of the projects mentioned undertaking maintenance of the transplantation plots. The majority of projects undertook subsequent monitoring (80%), yet the available data indicates that duration of monitoring efforts was not adequate to evaluate long-term success. The findings underline that while some general principles for successful coral restoration projects are reasonably well established, others need to be mainstreamed better in order to improve the effectiveness of coral transplantation for reef restoration. This relates in particular to sustainable funding, adequate site assessment, and long-term monitoring using established protocols. Additional information is needed to better understand and address potential challenges with regards to the sourcing of transplants and use of slow-growing species. A better integration of practitioners is necessary to improve the understanding of coral transplantation effectiveness. The results underline a need to develop and use monitoring protocols that allow gauging and comparing the effectiveness of coral transplantation among various projects, as well as for accessible platform(s) to allow the exchange of experiences made in different projects. Regular surveys of restoration projects are recommended to collate and share information among practitioners. We provide a number of recommendations for items to include in future surveys.
Several intergovernmental agreements highlight the need for resilience in the face of environmental and societal challenges. Coastal systems are particularly complex and susceptible to global climate change, and building human resilience to future changes is of high priority. While the concept of resilience has historically been associated with stability to perturbations, the notion of transformation within the social-ecological resilience (SER) approach has recently gained importance in ecosystem management. In order to operationalize resilience in the context of coastal governance in a changing climate, a better understanding of the concept is required. This paper provides an overview of different approaches to resilience, including stability and transformation, in order to understand resilience as a concept in a coastal governance context. Subsequently, we propose five steps and three types of knowledge (system, target, transformative) with which to embed SER in coastal governance. In addition, we consider scale and system boundaries; identify (un)desirable system characteristics and the role of normative goals and common visions in resilience management. Finally, we highlight the central role that local actors and information services play in fostering a two-way exchange between science and society and tailoring solutions for establishing or enhancing SER to the needs of local actors. We conclude that the navigation between stability and transformation within the concept of resilience is central to finding sustainable future pathways in the face of climate change.
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