HELCOM RED LIST Biotope Expert Team
Baltic photic zone bottoms with at least 90 % coverage of rock or boulders. Epibenthic crustacean cover at least 10% of the seabed and more than other perennial attached erect groups. Out of the attached epibenthic crustacean, Balanidae represent at least 50 % of the biomass.
Substrate is rock and/or boulders. Depth is typically from 0 to 20 meters. Appears in all wave exposure classes. Salinity must be >3 psu.
Amphibalanus improvises, Balanus crenatus, Semibalanus balanoides
Diversity, abundance and biomass of fauna.
HELCOM 1998: 18.104.22.168.1 Sublittoral level soft rock bottoms with little or no macrophyte vegetation 22.214.171.124.1 Sublittoral level stony bottoms with little or no macrophyte vegetation EUNIS 2012: A3.4 : Baltic exposed infralittoral rock A3.5 : Baltic moderately exposed infralittoral rock A3.6 : Baltic sheltered infralittoral rock
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