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Concept: [Ascophyllum nodosum] ecad. [mackaii] beds on extremely sheltered mid eulittoral mixed substrata in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/A1.325
Preferred label [Ascophyllum nodosum] ecad. [mackaii] beds on extremely sheltered mid eulittoral mixed substrata
Definition Extremely sheltered mid shore mixed substrata, usually subject to variable salinity due to freshwater runoff, which support beds of the non-attached growth form of the wrack [Ascophyllum nodosum] ecad [mackaii]. Cobbles and other hard substrata are often characterised by the normal form of [A. nodosum] with the red seaweed [Polysiphonia lanosa] growing as an epiphyte and other fucoids such as [Fucus vesiculosus]. The loose mats of [A. nodosum] ecad [mackaii] provide a cryptic and humid habitat for mobile species including gammarids, the crab [Carcinus maenas] and the winkles [Littorina littorea, Littorina obtusata] and [Littorina saxatilis]. The barnacle [Semibalanus balanoides] and the mussel [Mytilus edulis] are commonly attached to pebbles and cobbles on the sediment, while the infauna may contain the polychaetes [Arenicola marina] and [Lanice conchilega]. NB: This biotope is a BAP-habitat. Situation: Occurs in extremely sheltered conditions at the heads of Scottish sea lochs (but is also known from other sheltered areas). Temporal variation: [A. nodosum ecad mackaii] develops initially from broken fragments of [A. nodosum] and can in sheltered conditions grow in unattached, often bladderless, wig-shaped masses in the mid to upper tide zone. Note: "Ecad" has no official status in International Code of Botanical Nomenclature, but the terminology has been applied to the free-living form of [A. nodosum] since the beginning of the 19th century. The term was first employed by Clements (1905) to denote a form which results from adaptation or a change in morphology due to a new habitat - phenotypic variation.
Notation A1.325
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match