Barrier database for France (AMBER-FR)

Artificial barriers are one of the main threats to river ecosystems,
resulting in habitat fragmentation and loss of connectivity. Yet, the abundance
and distribution of most artificial barriers, excluding high head dams,
is poorly documented. We provide a global assessment of the distribution and
typology of artificial barriers
in France, and estimate for the first time the extent of river fragmentation.
To this end, barrier
data were compiled from existing databases and were ground truthed by field
surveys and citizen science data to derive a correction factor for barrier
density across France.