AA.E3 Baltic photic shell gravel characterized by macroscopic infaunal 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; macroscopic infauna present, no macrovegetation or epibenthic macrofauna. Only for biotopes occuring in Kattegat and the most southern parts of the Baltic Sea

Physical environment

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

Characteristic species

Due to the large variety of interstitial space, inhabited by very specialized fauna, for example Amphioxus spp. (HELCOM 1998)

Mapping advise (habitat delineation, identification, similar types)

Photic zone areas consisting of dead mollusc shells or shell fragments. Macroscopic infauna present, no macrovegetation or epibenthic macrofauna.

Geographic range

Kattegat and the most southern parts of the Baltic Sea

Anthropogenic threats

Eutrophication

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 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

 Publications

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