surveys of the East Anglia Zone and East Anglia ONE export cable corridor survey (Appendix 10.2 and Appendix 10.3). Table 10.14 below provides a summary of the sensitivities of these biotopes to physical disturbance.


Table 10.14. Biotope sensitivities to physical disturbance within the offshore cable corridor (MarLIN website and Tyler-Walters et al. 2011 and 2004) level three sensitivities are extrapolated from level four and five biotopes assessments


Biotope


SS.SCS.ICS SS.SMx.IMx SS.SSa.IMuSa SS.SMu.ISaMu


SS.SCS.CCS.MedLumVen Biotope description


Infralittoral coarse sediment Infralittoral mixed sediment Infralittoral muddy sand Infralittoral sandy mud


Mediomastus fragilis, Lumbrineris spp. and venerid bivalves in circalittoral coarse sand or gravel


SS.Smx.CMx.MysThyMx


Mysella bidentata and Thyasira spp. in circalittoral muddy mixed sediment


SS.SCS.ICS.HeloMsim


Hesionura elongata and Microphthalmus similis with other interstitial polychaetes in infralittoral mobile coarse sand


SS.SSa.CFiSa.ApriBatPo


Abra prismatica, Bathyporeia elegans and polychaetes in circalittoral fine sand


SS.SSa.CMuSa.AalbNuc


Abra alba and Nucula nitidosa in circalittoral muddy sand or slightly mixed sediment


SS.Ssa.CFiSa.EpusOborApri


Echinocyamus pusillus, Ophelia borealis and Abra prismatica in circalittoral fine sand


Intolerance


Intermediate High Intermediate High Intermediate High Intermediate High Intermediate High


Recoverability Sensitivity Low Low Low Low Low


Intermediate High


Low


Not available but it has low sensitivity to substratum loss


Not available


Intermediate High


Low


Not available


167. Table 10.14 indicates that the majority of biotopes within the offshore cable corridor can be considered to be of low sensitivity, for those with no available assessment given the similarities between the biotopes and biotope SS.SSa.CMuSa.AalbNuc (Abra alba and Nucula nitidosa in circalittoral muddy sand or slightly mixed sediment) it is considered that these are also of low sensitivity. As none of the


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 1 Introduction Page 60


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