AA.A1D Baltic photic rock and boulders characterized by aquatic moss


Author                                     

HELCOM RED LIST Biotope Expert Team

Textual description            

Baltic bottoms in the photic zone with at least 90 % coverage of rock, boulders or stones of more than 63 mm in diameter. Perennial moss cover at least 10 % of the seabed and more than other perennial attached erect groups.

Physical environment       

Salinity range: <5 psu; Exposure range: all, more common in exposed areas; Depth range: photic zone usually from about 1 to 7 meters

Characteristic species        

Fontinalis spp.

Geographic range               

Bothnian Bay. to the northern Bothnian Sea, Eastern Gulf of Finland

Anthropogenic threats     

Eutrophication

Correspondence with other classification systems               

HELCOM 1998:
2.1 Rocky bottoms
2.1.1 Soft rock
2.1.1.2 Sublittoral photic zone
2.1.1.2.2 Level bottoms dominated by macrophytevegetation
2.1.2 Solid rock (bedrock)
2.1.2.2 Sublittoral photic zone
2.1.2.2.1 Level bottoms dominated by macrophytevegetation
2.2 Stony bottoms
2.2.2 Sublittoral photic zone
2.2.2.2 Level bottoms dominated by macrophyte vegetation
EUNIS 2012:
A3.4 : Baltic exposed infralittoral rock
A3.5 : Baltic moderately exposed infralittoral rock
A3.6 : Baltic sheltered infralittoral rock

 Publications

BSEP139.jpg