The analysis focuses on monitoring the ecological status of the coastal and transitional waters of the Western Channel and the Bay of Biscay. The ecological status of a coastal water body within the meaning of the European Water Framework Directive (WFD) is determined by the biological state, physicochemical state and hydromorphological state of the water mass, water. The statement is determined according to the rules described in the decree of 25 January 2010.

Excess nitrogen from agricultural drainage by hydrographic zone in the Loire-Bretagne basin. This data was collected as part of the "initial state" phase of DCSSM with the Loire-Bretagne Water Agency. Referent expert AAMP : Aurélie Blanck.

Toxic discharges from urban and industrial sources per hydrographic zone of the Loire Bretagne basin. This data was collected as part of the initial assessment of the MSFD with the Water Agency of Loire-Bretagne. Referent expert AAMP: Aurélie Blanck.

Discharges of nutrients (nitrogen, phosphorus and organic matter) and toxic releases (MI) per hydrographic zone from industries and communities of the Adour-Garonne basin. This data was collected as part of the initial assessment of the MSFD with the Water Agency of Adour-Garonne. Referent expert AAMP: Aurélie Blanck.

The chemical status of a coastal water body (coastal water or transition water) is determined by the most declassing of the defined states for heavy metals, pesticides, industrial pollutants and other pollutants taken into account by the WFD . The assessment is done once per management plan (once every six years). The most recent assessment of the state of the chemical state is presented in the DCE Loire-Bretagne atlas. Earlier reports are available in annual archives.

Discharges of nitrogen, phosphorus and organic matter per hydrographic zone from industries and communities in the Loire-Brittany basin. This data was collected as part of the initial assessment of the MSFD with the Water Agency of Loire-Bretagne. Referent expert AAMP: Aurélie Blanck.

Excess nitrogen from agricultural drainage by hydrographic zone in the Adour-Garonne basin. This data was collected as part of the "initial state" phase of DCSSM with the Adour-Garonne Water Agency. Referent expert AAMP : Aurélie Blanck. Partial description of the fields: "kgN_ha_an" : nitrogen surplus (kgN / ha / year)

The statistical analysis used (Principal Component Analysis followed by a classification method) to identify groups common to all months and describe the evolution of these groups during the year. The data used allows for monthly tables showing the selected parameters, calculated over the entire geographic area with a resolution of 0.1 °. This method identifies 10 hydrological landscapes present at various times of the year, and characterized by homogeneous hydrological conditions.

Location distribution per grid cell of 8 young harbor seals (Phoca vitulina), followed by Argos tags (between 2005 and 2008) along the English Channel coast following rehabilitation at the care center CHENE.