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Concept: [Ascophyllum nodosum] on full salinity mid eulittoral mixed substrata in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A1.3142
Preferred label [Ascophyllum nodosum] on full salinity mid eulittoral mixed substrata
Definition Sheltered to extremely sheltered full salinity mixed substrata (cobbles, boulders and pebbles on sediment) characterised by a canopy formed by a mosaic of the wracks [Ascophyllum nodosum] and [Fucus vesiculosus]. The red seaweed [Polysiphonia lanosa] can often be found as an epiphyte on the [A. nodosum]. The mussel [Mytilus edulis] often occurs in clumps, and provides further suitable substrata for the attachment of fucoids and red and green seaweeds such as [Polysiphonia] spp. and [Enteromorpha intestinalis] or the barnacle [Semibalanus balanoides]. Winkles are common and [Littorina littorea] and [Littorina obtusata/mariae] may occur in high densities, while species such as the limpet [Patella vulgata], the crab [Carcinus maenas] and the whelk [Nucella lapillus] may occur on and around the boulders. Gammarids can be found underneath the boulders or among the seaweeds, while tube-forming spirorbids are found on the boulders, shells or on the [F. vesiculosus]. Infaunal species including the polychaetes [Arenicola marina] and [Lanice conchilega] may occur in the sediment between the cobbles. Situation: A sparse [S. balanoides], [P. vulgata] and [L. littorea] community (BLitX) can occur above this biotope. On shores with a proportion of smaller cobbles and boulders, large [A. nodosum] plants become uncommon and [F. vesiculosus] dominates the canopy (Fves.X). [F. vesiculosus] also tends to replace [A. nodosum] in areas with freshwater influence. Below this biotope are either a [Fucus serratus] dominated biotope (Fserr.X) or a [M. edulis] dominated biotope (Myt.Myt). Temporal variation: [A. nodosum] communities tend to be stable due to longevity of the individual [A. nodosum], but because of the mixed substrata some variation in the densities of [F. vesiculosus] and [A. nodosum] can be expected.
Notation A1.3142
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match