AA.E1 Baltic photic shell gravel characterized by macroscopic epibenthic biotic structures


Author

HELCOM RED LIST Biotope Expert Team

Textual description

Baltic bottoms in the photic zone with at least 90 % coverage of shell gravel; coverage of macroscopic vegetation or sessile macroscopic epifauna is at least 10 %.

Physical environment

Salinity range: all; Exposure range: moderate to high; Depth range: photic zone

Characteristic species

Saccharina latissima, Mytilus spp., Modiolus modiolus, Ciona intestinalis

Mapping advise (habitat delineation, identification, similar types)

Photic zone areas consisting of dead mollusc shells or shell fragments. Coverage of macroscopic vegetation or sessile macroscopic epifauna is at least 10 %.

Geographic range

South-western Baltic Sea, the Sound

Anthropogenic threats

Eutrophication

Correspondence with other classification systems

HELCOM 1998:

2.6 Shell gravel bottoms

2.6.2Sublittoral photic zone

HELCOM 2007:

Shell gravel bottoms

  • habitat under threat and/or in decline in all areas of occurrence: 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

http://eunis.eea.europa.eu/habitats/2288


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