HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of rock, boulders or stones of more than 63 mm in diameter. Less than 10 % of the seabed is covered by perennial vegetation or attached epifauna. Microphytobenthic organisms and snails dominate.
Substrate is rock and/or boulders. Appears in all wave exposure classes.
Snails, e.g. Hydrobia spp., Potamopyrgus antipodarum, Theodoxus fluviatilis, Bithynia spp., Radix spp..
Diversity, abundance and biomass of fauna.
Whole Baltic Sea, most typical in low salinity northern areas of the Baltic Sea
HELCOM 1998: 2.1 Rocky bottoms
2.1.1 Soft rock
126.96.36.199 Sublittoral photic zone
188.8.131.52.1 Level bottoms with little or no macrophytevegetation
2.1.2 Solid rock (bedrock)
184.108.40.206 Sublittoral photic zone
220.127.116.11.1 Level bottoms with little or no macrophytevegetation
2.2 Stony bottoms
2.2.2 Sublittoral photic zone
18.104.22.168 Level bottoms with little or no macrophyte
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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