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Concept

Ampharete falcata turf with Parvicardium ovale on cohesive muddy sediment near margins of deep stratified seas

URI http://vocab.nerc.ac.uk/collection/M20/current/JNCCMNCR00000459/
Within Vocab Marine Habitat Classification for Britain and Ireland Version 04.05
Alternative Labels SS.SMu.OMu.AfalPova
Definition Dense stands of Ampharete falcata tubes which protrude from muddy sediments, appearing as a turf or meadow in localised areas. These areas seem to occur on a crucial point on a depositional gradient between areas of tide-swept mobile sands and quiescent stratifying muds. Dense populations of the small bivalve Parvicardium ovale occur in the superficial sediment. Other infauna in this diverse biotope includes Lumbrineris scopa, Levinsenia sp., Prionospio steenstrupi, Diplocirrus glaucus and Praxillella affinis although a wide variety of other infaunal species may also be found. Both the brittlestars Amphiura filiformis and Amphiura chiajei may be present together with Nephrops norvegicus in higher abundance than the BlyrAchi or AfilEcor biotopes. Substantial populations of mobile epifauna such as Pandalus montagui and smaller fish also occur, together with those that can cling to the tubes, such as Macropodia spp. A similar turf of worm tubes formed by the maldanid polychaete Melinna cristata has been recorded from Northumberland (Buchanan 1963). Nephrops trawling may severely damage this biotope and it is possible that such activity has destroyed examples of this biotope in the Irish Sea (E.I.S. Rees pers. comm. 2002).
Date 2018-02-13T18:42:27
Identifier SDN:M20::JNCCMNCR00000459
Note accepted
Has Current Version 1
version 1

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