The objective of the RIFA project is to establish a network of islets of senescence in old forests representative of the diversity of auvergnat forest types. It includes: — carrying out a survey of the network of senescence ilots in old forest already existing in Auvergne — an analysis of the territories of old forests and forest types chosen to improve and strengthen the existing network of senescence ilots, — prioritisation and prioritisation of plots for the establishment of the network. This is the most important part of the project. It consists of selecting priority action parcels based on the results of the previous phase. It is planned to carry out an ecological and land diagnosis with a view to prioritising future plots of the ilots and placing them in the forest frame of the SRCE.