Inventory of devices for crossing terrestrial transport infrastructures by amphibians. This work was carried out by trainees and study managers from the Biodiversity, Water and Development division of Cerema Est. Background: According to the latest assessments from the International Union for Conservation of Nature (IUCN), 40% of amphibian species are threatened worldwide. In France, among other threat factors, a significant part of the decline of amphibians is linked to the densification of the land transport infrastructure network (ITT), in particular roads, which induces both significant mortality of individuals, but also a loss and fragmentation of their habitats, leading to the isolation or even extinction of populations. This phenomenon of anthropization and urbanization of environments increased particularly in the middle and at the end of the 20th century and more than a million kilometers of motorways, urban and interurban expressways, national, departmental and municipalities, mesh the territory today. Consequently, the possibilities of movement of amphibians in such landscapes are increasingly reduced even though most species, at our latitudes, have a life cycle between the aquatic and terrestrial environment, which involves seasonal migrations. Moreover, this densification of road networks leads to an increased risk of amphibian runovers. Some extrapolations made by scientists estimate the number of adults killed each year during spring migration as well as juveniles at several million. As part of an internship carried out in 2016 under the leadership of Cerema-Est, a national survey was conducted among 200 public and private structures, with a view to carrying out an inventory of the (temporary and permanent) crossing systems land transport infrastructure for amphibians. At the same time, Cerema-Est initiated the setting up of a European LIFE project, in collaboration with a large number of private and public partners in France and in two other European countries (Poland and Denmark). One of the flagship actions of this project is the creation of a shared database, gathering detailed information on all the devices. Ultimately, the objective is to achieve a free access and participatory database, allowing consultation and data entry for all interested persons / structures. The geographical data provided here includes geolocation and type information characterizing the devices listed in the survey carried out in 2016 (non-exhaustive survey).
