|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Sue Scott - A dense mat of Ascophyllum nodosum mackaii. Image width ca 40 cm.
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LR.SLR.FX.AscX.mac recorded () and expected () distribution in Britain and Ireland (see below)
|Distribution of biotope in Britain and Ireland||The distribution of Ascophyllum nodosum ecad mackaii is limited to Scottish sealochs, Strangford Lough in Northern Ireland and a few sites in the Irish Republic.|
For a full description of this biotope including characterizing species, distribution, survey information and references visit JNCC
Extremely sheltered mid shore mixed substrata, usually subject to variable salinity due to freshwater runoff, may support beds of the free-living Ascophyllum nodosum ecad mackaii. Cobbles and other hard substrata are often characterized by the normal form of Ascophyllum nodosum and other fucoids such as Fucus serratus and Fucus vesiculosus. The loose mats of A. nodosum ecad mackaii provide a cryptic and humid habitat for mobile species such as gammarids, the shore crab Carcinus maenas, littorinid molluscs (especially Littorina littorea) and eels Anguilla anguilla. Semibalanus balanoides and Mytilus edulis are commonly attached to pebbles and cobbles on the sediment, while the infauna may contain Arenicola marina, Lanice conchilega and other polychaetes. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).
This review can be cited as follows:
Hill, J.M. 2001. Ascophyllum nodosum ecad mackaii beds on extremely sheltered mid eulittoral mixed substrata. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 31/01/2015]. Available from: <http://www.marlin.ac.uk/habitatsbasicinfo.php?habitatid=138&code=1997>