AB.A4 Baltic aphotic rock ans boulders characterized by no macroscopic biotic structures


Author                                     

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. No macro- epi- or infauna

Physical environment       

Salinity range: all; Exposure range: all; Depth range: below photic zone ‑ more common in the deep.

Mapping advise (habitat delineation, identification, similar types)             

Areas with at least 90 % coverage of rock, boulders and/or stones of more than 63 mm in diameter within the aphotic zone. No macro- epi- or infauna

Geographic range               

Whole Baltic Sea

Correspondence with other classification systems               

HELCOM 1998:
2.1Rocky bottoms

2.1.1Aphotic zone

2.2Stony bottoms

2.2.1 Aphotic zone


 Publications

BSEP139.jpg