Aphelochaeta marioni and Tubificoides spp. in variable salinity infralittoral mud
|Marine Habitat Classification for Britain and Ireland Version 97.06
|Variable salinity cohesive muddy sediment dominated by the polychaete Aphelochaeta marioni and the oligochaetes Tubificoides spp. The polychaetes Polydora ciliata, Cossura longocirrata and Melinna palmata may also occur in high numbers. The cirratulid polychaete Caulleriella zetlandica may also occur (there is still inconsistency in the identification of the cirratulid group, compounded by fragmentation during sample processing). This biotope is very common in stable muddy environments and may extend from reduced salinity to fully marine conditions. The biotope may be separated from similar biotopes such as IMU.NhomTub by the abundance of A. marioni, terebellids and an indication of the stability of the sediment. In areas of mixed sediment A. marioni may also occur in high numbers. In this case it may be difficult to separate IMU.AmpTub from IMX.PolMtru requiring classification on sediment characteristics and associated species such as the bivalve Mya truncata in addition to the abundance of A. marioni. It may be separated from IMX.CreAph by the relative abundances of the slipper limpet Crepidula fornicata in addition to A. marioni. This biotope may also be found in conjunction with IMS.MacAbr.
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