0 0 e 0 0 0 *0 0 0 APPENDIX C2 0 0 Biotope Information 2009 0 For inspection purposes only. Consent of copyright owner required for any other use. 0 e 0 0 0 0 a 0 0 0 EPA Export 26-07-2013:19:32:33 For inspection purposes only. Consent of copyright owner required for any other use. EPA Export 26-07-2013:19:32:33 1- a.aMu.wmviu.LKorrpei seis koreni and Phaxas oellueidus in circalittoral sandw mud hll Hierarchv >> U Habitat (physical) description Dlstrlbutlor ialinity Full (30-35 ppt) Vave exposure: Exposed, Moderately exposed Tidal streams: Strong (3-6 kn), Moderately strong (1- 3 kn), Weak (>1 kn), Very weak (negligible) iubstratun Sandy mud !one: - Circalittoral Jepth Band: 10-20 m, 20-30 m, 30-50 m, 50-10( m Ither Features: Download comDarative Dhvsical and bioloaical data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes. listribution of habitat SS.SMu.CSaMu.LkorPpe For inspection purposes only. agis koreni and Phaxas pellucidus in circalittoral Consent of copyright owner required for any other use. andy mud, based on records on the JNCC iarine database. Red dots represent records on rhich the biotope is based. Blue dots show orther ertain records, black dots show records I mtativelv assianed to this biotope. Biotope description In stable circalittoral sandy mud dense populations of the tube building polychaete Lagis koreni may occur. Other species found in this habitat typically include bivalves such as Phaxas pellucidus, Mysella bidentata and Abra alba and polychaetes such as Mediomastus fragilis, Spiophanes bombyx, Owenia fusiformis and Scalibregma inflatum. At the sediment surface easily visible fauna include Lagis koreni and Ophiura ophiura. Lagis koreni is an important source of food for commercially important demersal fish, especially dab and plaice (Macer, 1967; Lockwood, 1980 and Basimi & Grove, 1985). Situation No situation data available. Temporal variation In some areas e.g. Liverpool Bay, AalbNuc and LkorPpel have exhibited cyclical behaviour with the community periodically switching from one biotope to another - possibly in relation to dredge spoil disposal (Rees et al. 1992) along with other environmental and biological factors. Both Lagis koreni and Phaxas pellucidus, are capable of EPA Export 26-07-2013:19:32:33 0 0 tolerating sudden increases in the deposition of sediment and often dominate such areas following such an event. 0 Indeed it is likely that the two biotopes are merely different aspects of the same community as Lagis koreniis often recorded with high densities of Abra alba (Eagle 1975; Rees and Walker 1983). Densities of mature populations of L. kareni may exceed 1000m-2 0 Similar biotopes SS.SSa.CMuSa.AalbNuc The current biotope is closely related to AalbNuc but tends to occur in muddier substratum Characterising Species Contribution tc Abr TEYE X 0 I I Typica similarity Cerianthus lloydii 2 Nemertea 5 214 Nereiphylla lutea 2 86 Lumbrineris gracilis 2 115 Prionospio ehlersi 1 149 spio 2 70 Spiophanes bombyx 7 636 Chaetoptenrs 1 variopedatus Chaetozone 1 Mediomastus fragiris 5 Scalibregma in flatum 3 174 Owenia fusiformis 3 95 Amphictene auricoma 1 323 Lagis koreni 22 Lagis koreni 8 882 Lanice conchilega 8 Pariambus typicus For inspection purposes only. 2 94 Consent of copyright owner required for any other use. Pseudmuma Iongimrnis 1 84 Pagurus bernhardus 4 Macropodia rostrata R 1 Corystes cassivelaunus R 1 Liocarcinus depurator R 1 Buccinum undatum 0 3 Nucula nitidosa 1 44 Mysella bidentata C 6 1225 Phaxas pellucidus A 6 639 Abra alba C 4 441 Phoronis C 2 114 Asterias rubens 0 6 Ophiuroidea 2 175 Amphiura filiformis 1 120 Ophiura albida C 6 EPA Export 26-07-2013:19:32:33 Ophiura ophiura 20 Psammechinus miliaris ...@@ 1 Echinocardium cordatum 4 Callionymus lyra 2 Pomatoschistus .. I)rl, 13 Pleuronectidae ea 3 ;S.SMx.CMx 3rcalittoral mixed sediment Salinity: Full (30-35 ppt) Nave exposure: Moderately exposed, Sheltered, Very sheltered - ridal8treams: Moderately strong (1-3 knl, Weak (>I Very weak (negligible) Substratum: Mixed sediment (with sta and 11s) - !one: Circalittoral hpth Bena: 5-10 m, 10-20 m, 20-au m, 80-50 m Download comparative physical and bioloaical data. The comparative tables enable a rapid comparison of the species composition and principa' I physical characteristics between a given set of biotopes. Previous code For inspection purposes only. Consent of copyright owner required for any other use. This biotope occurred in previous versions of the classification as: CMX - Version: 97.06 I Nstribution of habltat SS.SMx.CMx Clrcallttoral mixed ddlment, based on records on the JNCC marine databass. Red dots represent records on which the biotope is based. Wedots show orther certaln records, black dots show record sntatively assigned to this biotope. Biotope description Mixed (heterogeneous) sediment habitats in the circalittoral zone (generally below 15-20m) Including well mixed muddy gravelly sands a very poorly sorted mosaics of shell, cobbles and pebbles embedded in or lying upon mud, sand or gravel. Due to the variable nature of the seabed a variety of communities can develop which are often very diverse. A wide range of Infaunal polychaetes, bivalves, echinoderms and burrowing anemones such as Cerianthus lloydil are often present in such habitat and the presence of hard substrata EPA Export 26-07-2013:19:32:33 e 0 shells and stones) on the surface enables epifaunal species to become established, particularly nyaroids such as Nemertesia spp and 0 Yydrallmania falcata. The combination of epifauna and infauna can lead to species rich communities. Coarser mlxed sediment :ommunities may show a strong resemblance, in terms of infauna, to blotopes within the SCS complex. However, infaunal data for this )iotope complex is limited to that described under the biotope MysThyMx, and so are not representative of the infaunal component of this 0 )lotope complex. Situation Jo situation data available. e remporal variation 40 temporal data available. 0 Similar biotopes Jot applicable or unknown. Characterising Species 0 rn TrypicelAbundance b Contribution to similarity Hydrallmania falcata 0 0 Nemertesia antennina 0 Nemertesia ramosa 0 Alcyonium digitatum 0 0 Cerianthus lloydii F Urticina felina 0 0 Nemertea C 2 31 Nematoda F 3 480 Pholoe inornata F 2 103 0 Glycera alba A 1 23 Gonieda maculate C 2 27 0 Nephtys C 1 38 Nephtys hombeaii C 2 38 Lumbrineris gracilis C 4 155 e Scoloplos arrniger A 3 90 Levinsenia gracilis ForC inspection purposes only. 1 67 Consent of copyright owner required for any other use. Prionospio fallax A 8 492 e Spiophanes bombyx F 2 75 Chaetozone setosa C 4 141 0 Mediomastus fragilis C 2 147 Scalibmgma inflatum C 2 65 Galathowenia oculata F 1 74 0 Owenia fusiformis C 2 29 Terebellides stroemi A 2 32 0 Terebellidae 0 Lanice conchilega 0 Pomatoceros triqueter 0 e Ampelkca tenuicomis F 2 111 Eudorelk truncatula A 1 37 Pagurus bernhardus 0 a Liocarcinus depurator 0 Buccinum undatm 0 a Modiolus modiolus 0 0 EPA Export 26-07-2013:19:32:33 0 0 Pecten maximus am 0 Thyasira flexuosa ma... C 375 e Mysella bidentata mmm F 249 Phaxas pellucidus mm. C 28 Abra alba ma. C 191 0 Chamelea gallina mm.. C 44 Flustra foliacea * 0 0 Phoronis am. C 2 149 Crossaster pappus ma R Asterias rubens WO 0 0 Ophiothrix fragilis ma C Ophiocomina nigra F Amphiura filiformis ..ma. A 1 0 Ophiura albida I)rl) F Echinus esculentus ma 0 a Psolus phantapus ma 0 Thyone fusus m 0 0 Corallinaceae ma 0 For inspection purposes only. Consent of copyright owner required for any other use. EPA Export 26-07-2013:19:32:33 For inspection purposes only. Consent of copyright owner required for any other use. EPA Export 26-07-2013:19:32:33.