HELCOM RED LIST Biotope Expert Team
Baltic photic bottoms with at least 90 % coverage of shell gravel. Perennial attached algae cover at least of 10 % of the seabed and more than other perennial attached erect groups.
Substrate is shell gravel. Appears mostly in high energy exposure areas.
Southern part of Baltic Sea
Increase in atmospheric CO2 (Ocean acidification)
2.6 Shell gravel bottoms
2.6.2 Sublittoral photic zone
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
A5 Sublittoral sediment
A5.5 Sublittoral macrophyte-dominated sediment
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