Sparse fauna in reduced salinity infralittoral mobile sand
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Very mobile sand in areas of strong tidal currents and reduced salinity. No stable community is able to develop within this extremely mobile and abrasive habitat. The fauna encountered in this habitat consists of epifaunal crustaceans or relatively low numbers of species, such as Bathyporeia spp. and Haustorius arenarius, washed in from adjacent communities. This biotope is found in tidal channels of estuaries and areas where water movement keeps silt and mud in suspension, and excludes even the more robust infauna. If oligochaetes, polychaetes and bivalves are present in any numbers within this habitat type then care must be taken to avoid the inclusion of juvenile or spat recruitment counts which may mask the presence of this biotope. This is particularly relevant as sampling usually occurs at slack water periods when settlement takes place. The biotope bears some similarity with IGS.NeoGam although no freshwater community will be present. IGS.MobRS is a reduced salinity version of IGS.Mob, distinguished from this by the absence of species not tolerant of reduced salinities.|
|Has Current Version||1|
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