Suivi multi-niveau après la restauration d'un réseau de mares forestières et temporaires

Abstract

International audienceForest ponds with permanent and temporary waters are ecosystems of great interest in terms of biodiversity and biogeochemical functioning. They are generally characterized by oligotrophic water with low pH. Also, they support populations of amphibian species and invertebrates like dragonflies (Odonata). However, in many forests of Europe, these types of wetlands were degraded by forestry. In 2012, we restored 32 forest ponds including vernal pools that had been intensively degraded by forest industry in the North-West of France (Chinon, Indre-et-Loire). Most of the ponds were filled, drained and planted with trees. After digging and cutting trees, we monitored three major taxonomic groups, vegetation, amphibians, and Odonata from 2012 to 2016, both in reference ponds (non-degraded, and undisturbed) and restored ponds. In addition, we measured several hydro-geochemical variables. To take into account the multiple dimensions of ecological restoration objectives in our site, we used a new synthetic framework to assess the success of the whole project. We present the main results for the ecological variables, the outputs of this framework and discuss its usefulness