AB.I Baltic aphotic coarse sediment


Author

HELCOM RED LIST Biotope Expert Team

Textual description

Baltic bottoms in the aphotic 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

Physical environment

Salinity range: All; Exposure range: All; Depth range: Below photic zone ‑ more common in the shallow.

Geographic range

Whole Baltic Sea

Correspondence with other classification systems

HELCOM 1998:

2.4Gravel bottoms

2.4.1 Aphotic zone

EUNIS 2012:

A5 Sublittoral sediment

A5.1 Sublittoral coarse sediment

A5.11 Infralittoral coarse sediment in low or reduced salinity

A5.114 : Baltic gravel bottoms of the aphotic zone

http://eunis.eea.europa.eu/habitats/2619

 Publications

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