AA.E4 Baltic photic shell gravel characterized by no macroscopic biotic structures


HELCOM RED LIST Biotope Expert Team

Textual description

Baltic bottoms in the photic zone with at least 90 % coverage of shell gravel; no macrovegetation, no macro- epi- or infauna

Physical environment

Salinity range: up to 5 psu; Exposure range: moderate to high; Depth range: photic zone

Mapping advise (habitat delineation, identification, similar types)

Photic zone areas consisting of dead mollusc shells or shell fragments. No macrovegetation, no macro- epi- or infauna present.

Geographic range

Kattegat and the most southern parts of the Baltic Sea

Anthropogenic threats


Correspondence with other classification systems

HELCOM 1998:

2.6 Shell gravel bottoms

2.6.2 Sublittoral photic zone

HELCOM 2007:

Shell gravel bottoms

  • habitat under threat and/or in decline in all areas of occurrenc: The Southern Baltic Proper, The Gulf of Gdansk, Bay of Mecklenburg, Kiel Bay, Little Belt, Great Belt, The Sound, Kattegat

 EUNIS 2012:

A5 Sublittoral sediment

A5.1 Sublittoral coarse sediment

A5.11 Infralittoral coarse sediment in low or reduced salinity

A5.113 : Baltic shell gravel bottoms in the infralittoral photic zone