HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the photic zone with at least 90 % coverage of muddy sediment. The sediment must contain at least 20 % of mud, silt or clay (grain size less than 63 µm). No perennial attached erect group has a coverage ≥ 10%. Stable aggregations of unattached perennial vegetation cover at least 10 % of the seabed. Out of the unattached perennial vegetation Fucus spp. (dwarf form) constitutes at least 50 % of the biovolume.
range: >4.5 psu; Exposure range: low to moderately high; Depth range: photic
zone from about 2 to 5 meters and deeper in clear waters.
Fucus vesiculosus dwarf form (synonyme f.pygmaea)
density of unattached Fucus spp. (dwarf form)
along the coast of Sweden and Germany
HELCOM 1998:2.7 Muddy bottoms2.7.2 Sublittoral photic zone220.127.116.11 Dominated by macrophyte vegetationEUNIS 2012:A5 Sublittoral sedimentA5.5 Sublittoral macrophyte-dominated sediment
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This biotope has been listed as Endangered (EN) in the HELCOM Red List of Baltic Sea biotopes and habitats.
See the Biotope Information Sheet of AA.H1Q2