Restoring or not abandonned quarries: it may depends on stakeholder's point of view | Restaurer ou non les carrières abandonnées : le choix peut dépendre des points de vue des acteurs

[Departement_IRSTEA]Territoires [TR1_IRSTEA]SEDYVIN

International audience

英语. Whether we should intervene or not on abandoned anthropogenic ecosystem remains a central question in restoration ecology. Answers to this question may differ from the stakeholder's point of view. Integrating these points of view when monitoring different options that had been carried out decades ago (actively restoring or not) could provide a basis for the future choices. We focused on abandoned quarries in the South-East of France (La Crau area, a Mediterranean steppe ecosystem). Some of them have been partially refilled with the steppe topsoil, some refilled with exogenous soils and some not refilled at all. Our study will focus on the question: which of the different abandonment options provided the best restoration success? Many characteristics have been measured on these systems, such as the plant communities, the presence of amphibians and birds or the soil characteristics. Based on a sociological study we also have some indicators of stakeholder's perceptions of the different ecosystems that could develop there. Our study will use the ASPIRE framework: Appraising the Success of Project In ecological Restoration and Ecological engineering, which allow the summarization of a whole project success through all its dimensions or objectives. It has been specifically developed to integrate the point of view of different stakeholders. The framework is hierarchized in three levels: the variables, the objectives and the project. The ultimate score of the project is a weighted mean of objectives scores; the objectives scores are weighted means of their variables scores and the variables scores are calculated through a utility function based on the variables values relative to their references. While the success scores are calculated on the same data provided by monitoring, as each stakeholder gives a weight to the different objectives, ASPIRE is able to provide a success score for each stakeholders.