AA.M2W Baltic photic mixed substrate characterized by microphytobenthic organisms and grazing snails


Author                                     

HELCOM RED LIST Biotope Expert Team

Textual description            

Baltic bottoms in the photic zone with more than 10 %, but less than 90 % coverage of both hard and soft substrata. Sessile/semi-sessile macroscopic epibenthic fauna and flora is present but has less than 10 % coverage. Microphytobenthic organisms and grazing snails dominate. Grazing snails (e.g. Hydrobiidae, Theodoxus, Bithynia, Radix) constitute 50 % in biomass or volume

Physical environment       

Salinity range: moderate to high; Exposure range: all; Depth range: photic zone, more common in the deepest and the most shallow parts.

Geographic range               

Whole Baltic Sea

Correspondence with other classification systems               

HELCOM 1998:

2.8 Mixed sediment bottoms

2.8.2 Sublittoral photic zone

 

EUNIS 2012:

A5 Sublittoral sediment

A5.4 : Sublittoral mixed sediments

A5.41 : Sublittoral mixed sediment in low or reduced salinity

http://eunis.eea.europa.eu/habitats/5435


 Publications

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