HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of coarse sediment. Coarse sediment has less than 20 % of mud/silt/clay fraction (<63 µm), and the proportion of gravel and pebbles (grain size 2–63 mm) exceeds 30% of the combined gravel and sand fraction . Submerged rooted plants cover at least 10 % of the seabed and more than other perennial attached erect groups. Of the submerged rooted plants, Ranunculus spp. constitutes at least 50 % of the biovolume.
range: >6 psu; Exposure range: moderate to high; Depth range: photic zone
from about 1 to 7 meters.
Whole Baltic Sea
2.4 Gravel bottoms
2.4.2 Sublittoral photic zone
22.214.171.124 Level bottoms dominated by macrophyte vegetation
A5 Sublittoral sediment
A5.5 Sublittoral macrophyte-dominated sediment
A5.54 Angiosperm communities in reduced salinity
A5.543 Vegetation of brackish waters dominated by [Ranunculus baudotii]
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