AA.M1B3 Baltic photic mixed substrate dominated by watermilfoil (Myriophyllum spicatum and/or Myriophyllum sibiricum)


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. Submerged rooted plants cover least 10 % of the seabed and more than other perennial attached erect groups. Out of the submerged rooted plants, watermilfoil constitutes at least 50 % of the biovolume.

Physical environment       

Salinity range: <6 psu; Exposure range: low; Depth range: photic zone from about 0.2 to 2 meters.

Characteristic species        

Myriophyllum spicatum, Myriophyllum sibiricum

GEOGRAPHIC RANGE

Whole Baltic Sea

ANTHROPOGENIC THREATS

Eutrophication

Correspondence with other classification systems               

HELCOM 1998:

2.8 Mixed sediment bottoms

2.8.2 Sublittoral photic zone

2.8.2.2 Dominated by macrophyte vegetation

EUNIS 2012:

A5 Sublittoral sediment

A5.5 Sublittoral macrophyte-dominated sediment

A5.54 Angiosperm communities in reduced salinity

http://eunis.eea.europa.eu/habitats/1591

 Publications

BSEP139.jpg