Benthos-Pertuis-Charentais is a spatially explicit benthic database, comprising 11 years of benthic data. It is the result of intensive benthic sampling that has been conducted on a regular grid (259 stations) covering the intertidal mudflats of the Pertuis-Charentais (Marennes-Ole'ron Bay and Aiguillon Bay). Samples were taken by foot or by boats during winter depending on tidal height, from December 2003 to February 2014. The present dataset includes abundances and biomass densities of all mollusc species of the study regions and principal polychaetes as well as their length, accessibility to shorebirds, energy content and shell mass when appropriate and available. This database has supported many studies dealing with the spatial distribution of benthic invertebrates and temporal variations in food resources for shorebird species as well as latitudinal comparisons with other databases.

French intertidal and subtidal Macroalgae taxa data are collected during REBENT monitoring surveys on the English Channel / Bay of Biscay coasts. Protocols are implemented in the Water Framework Directive.

French Zostera Marina and Zostera Noltei abundance data are collected during REBENT monitoring surveys on the English Channel / Bay of Biscay coasts. Protocols are implemented in the Water Framework Directive.

French benthic invertebrates composition and abundance taxa data are collected during REBENT monitoring surveys on the English Channel / Bay of Biscay coasts and during RSLFAU monitoring surveys on Mediterranean coast. Protocols are implemented in the Water Framework Directive.