AA.J1A2 Baltic photic sand dominated by sedges (Cyperaceae)


HELCOM RED LIST Biotope Expert Team

Textual description            

Baltic bottoms in the photic zone with at least 90 % coverage of sand. Sand has less than 20 % of mud/silt/clay fraction (<63 µm), and the proportion of sand (grain size 0.063–2 mm) exceeds 70% of the combined gravel and sand fraction.  Emergent vegetation covers least 10 % of the seabed and more than other perennial attached erect groups. Out of the emergent vegetation, sedges constitutes at least 50 % of the biovolume.

Physical environment       

Salinity range: all; Exposure range: moderate; Depth range: approximately <1 meter

Characteristic species        

Schoenoplectus spp, Bolbaschoenus maritimus


Whole Baltic Sea

Correspondence with other classification systems               

HELCOM 1998:

2.5 Sandy bottoms

2.5.2 Sublittoral photic zone Level bottoms dominated by macrophyte vegetation

EUNIS 2012:

A5 Sublittoral sediment

A5.5 Sublittoral macrophyte-dominated sediment

A5.54 Angiosperm communities in reduced salinity