AB.A4U Baltic aphotic rock and boulders characterized by no macrocommunity


HELCOM RED LIST Biotope Expert Team

Textual description            

Baltic bottoms in the aphotic zone with at least 90 % coverage of rock, boulders or stones of more than 63 mm in diameter. Sessile/semi-sessile epibenthic fauna is not present.

Physical environment       

Substrate is rock and boulders.

Geographic range                

Whole Baltic Sea

Correspondence with other classification systems               

HELCOM 1998:

2.1 Rocky bottoms

2.1.1 Aphotic zone

2.2 Stony bottoms

2.2.1 Aphotic zone