D5

5.1 Nutrients level

5.1.1 Nutrient concentration

5.2.1 Chlorophyll concentration

5.2.2 Water transparency

5.2.3 Abundance of macroalgae

5.2.4 Shift in floristic species composition

5.3.1 Abundance of seaweeds and seagrasses

5.3.2 Dissolved oxygen

ANS-BE-MS-1: Conform the Directive, GES and the environmental targets for the Belgian marine waters are defined on the basis of the eleven qualitative descriptors listed in Annex I of the Directive. The definition of GES is expressed in a qualitative description of what GES would look like when achieved for each of the descriptors. This is then underpinned by a set of more detailed quantitative environmental targets based on established environmental thresholds/limits for state, pressure or impact (Art. 10). Where quantitative environmental thresholds could not be set, trend-based or qualitative thresholds were used. The complete package of GES and environmental targets needs to give a complete and balanced overview.

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• Belgian Part of the North Sea

• InputN_Psubst
• NutrientOrgEnrich
• WaterColumnHabitatsAll

D5

5.1

5.1.1

5.2.1

5.2.2

5.2.3

5.2.4

5.3.1

5.3.2

GES for eutrophication would be achieved if: firstly the criteria for a Good Ecological Status defined in the framework of the Water Framework Directive are achieved. If the first target is reached, the criteria defined in the OSPAR Common Procedure need to be achieved.