D4

1.7 Ecosystem structure

1.7.1 Composition ecosystem

4.1 Productivity (production per unit biomass) of key species or trophic groups

4.1.1 Productivity of key predators

4.2 Proportion of selected species at the top of food webs

4.2.1 Large fish by weight

4.3 Abundance/distribution of key trophic groups/species

4.3.1 Abundance trends of selected groups/species

MAL-EL-MS-AL: For descriptors 3, 5, 6, 8 and 9 it is attempted to approach GES quantitatively using environmental thresholds/limits to describe the desired state of GES. For descriptors 1, 2, 4,7 and 10 a qualitative description of what GES will be like is provided.

• Hellenic Republic's marine waters part of the Aegean-Levantine subregion
• It constitutes the assessment area South Aegean Sea belonging in the subregion Mediterranean sea:Aegean-Levantine sea

• ExtractSpeciesAll
• FishPelagic
• LitRock
• LitSed
• MarineCoast
• MarineOceanic
• MarineShelf
• PhysDam
• ShallCoarseSed
• ShallMud
• ShallMxdSed
• ShallRock
• ShallSand
• ShelfCoarseSed
• ShelfMud
• ShelfMxdSed
• ShelfRock
• ShelfSand

D4

1.7

1.7.1

4.1

4.1.1

4.2

4.2.1

4.3

4.3.1

To achieve GES there should be: No significant change in the proportion of biomass at higher trophic levels in the total catch of demersal fish. No significant decrease in the populations of large pelagic fish.