HELCOM RED LIST Biotope Expert Team
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, common eelgrass constitutes at least 50 % of
range: >6 psu; Exposure range: moderate to high; Depth range: photic zone
from about 1 to 7 meters.
limit of vegetation, amount of epiphytic algae
Whole Baltic Sea
2.4 Gravel bottoms
2.4.2 Sublittoral photic zone
18.104.22.168 Level bottoms dominated by macrophyte vegetation
The Bothnian Sea, Åland Sea, Archipelago Sea, Gulf of Finland, Gulf ot Riga, The Northern Baltic Proper, Western Gotland Basin, Eastern Gotland Sea, 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
A5.54 Angiosperm communities in reduced salinity
A5.545 [Zostera] beds in reduced salinity infralittoral sediments
OSPAR list of threathened biotopes:
Habitat occurs in the OSPAR Region II (including Kattegat) and is listed threatened and/or in decline in this region
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This biotope has been listed as Near Threatened (NT) in the HELCOM Red List of Baltic Sea biotopes and habitats.