Marine Biodiversity Data Portal - NI

Marlfield Rocks, Strangford Lough.

Survey number: 555 Event number: 19850630/21 Date: 1985-06-30 GPS: 54.40683,-5.57800. Depth: 3.5 to 0.2 m. [ View map ]

Site Description: This is one of the few sites in Strangford Lough composed mainly of rock ridges from high to low water. The ridges are Ascophyllum dominated, with an understorey of turf forming red algae in the Ascophyllum zone, changing to encrusting corallines in the lower two zones. At the sampling site there is a relatively wide, flat upper shore (supporting the Pelvetia and Fucus spiralis zones), with stones, muddy gravel and cobbles overlying the ridges. Above this is a narrow fringing saltmarsh (also sampled). Animal diversity at this site is not high for Strangford Lough, perhaps because there are few boulders for animals to live under.

No images for site.

Species list (177 species recorded)

PORIFERA Streptosyllis websteri Idotea granulosa Musculus discors Lipophrys pholis Ceramium sp. Pelvetia canaliculata
Leucosolenia sp. Nereis pelagica Tanais dulongii Turtonia minuta RHODOPHYTA Ceramium echionotum CHLOROPHYTA
Sycon ciliatum Platynereis coccinea Palaemon elegans Hiatella arctica Erythrotrichia carnea Plumaria plumosa Monostroma grevillei
Grantia compressa Cirratulus cirratus Pagurus bernhardus BRYOZOA Acrochaetium secundata Membranoptera alata Ulothrix flacca
Myxilla incrustans Capitellidae sp. Pisidia longicornis Alcyonidium gelatinosum Audouinella sp. Osmundea hybrida Ectochaete sp.
Halichondria panicea Arenicola marina Porcellana platycheles Alcyonidium hirsutum Gelidium sp. Polysiphonia sp. Blidingia sp.
Haliclona simulans Fabricia sabella Cancer pagurus Flustrellidra hispida Gelidium spinosum Polysiphonia lanosa Blidingia minima
Halisarca dujardinii Sabella pavonina Carcinus maenas Membranipora membranacea Palmaria palmata Polysiphonia stricta Enteromorpha sp.
Laxosuberites sp. Filograna implexa Pilumnus hirtellus Electra pilosa Rhodothamniella floridula CHROMOPHYTA Enteromorpha clathrata
CNIDARIA Spirorbis spirorbis MOLLUSCA Callopora lineata Ahnfeltia plicata Ectocarpus fasciculatus Enteromorpha compressa
Haliclystus auricula Spirorbis tridentatus Calliostoma zizyphinum Phaeostachys spinifera Hildenbrandia rubra Pylaiella littoralis Enteromorpha intestinalis
Clava sp. OLIGOCHAETA sp. Testudinalia testudinalis Cellepora pumicosa Corallina officinalis Streblonema effusum Enteromorpha linza
Dynamena pumila CRUSTACEA Tectura virginea ECHINODERMATA Lithothamnion glaciale Elachista fucicola Enteromorpha prolifera
Sertularia sp. Verruca stroemia Patella (Patella) ulyssiponensis Asterina gibbosa Melobesia membranacea Dictyosiphon foeniculaceus Percursaria percursa
Obelia geniculata Chthamalus stellatus Patella (Patella) vulgata Leptasterias muelleri Phymatolithon lenormandii Chilionema reptans Ulva fasciata
Actinia equina Elminius modestus Patella pellucida Ophiothrix fragilis Pneophyllum sp. Ralfsia sp. Chaetomorpha linum
Anemonia viridis Semibalanus balanoides Lacuna (Lacuna) pallidula Amphipholis squamata Titanoderma pustulatum Ralfsia verrucosa Cladophora sp.
Urticina felina Apherusa jurinei Littorina (Littorina) littorea Psammechinus miliaris Catenella caespitosa Leathesia difformis Cladophora albida
NEMERTEA Hyale prevostii Littorina (Neritrema) mariae Echinus esculentus Cystoclonium purpureum Cladostephus spongiosus Cladophora rupestris
NEMERTEA sp. Orchestia gammarellus Littorina (Neritrema) neglecta TUNICATA Dilsea carnosa Sphacelaria fusca Cladophora sericea
Lineus ruber Lysianassa ceratina Littorina (Neritrema) obtusata Polyclinum aurantium Dumontia contorta Chorda filum Rhizoclonium riparium
ANNELIDA Tritaeta gibbosa Skeneopsis planorbis Sidnyum turbinatum Furcellaria lumbricalis Laminaria digitata Codium sp.
Harmothoe extenuata Amphithoe rubricata Rissoa interrupta Trididemnum tenerum Chondrus crispus Halidrys siliquosa
Harmothoe imbricata Ericthonius sp. Onoba (Onoba) semicostata Didemnum sp. Mastocarpus stellatus Ascophyllum nodosum
Harmothoe impar Jassa falcata Nucella lapillus Ciona intestinalis Phyllophora crispa Fucus ceranoides
Phyllodoce laminosa Caprella acanthifera Buccinum undatum Dendrodoa grossularia Phyllophora pseudoceranoides Fucus serratus
Sphaerodorum gracilis Jaera albifrons Adalaria proxima Botryllus schlosseri Lomentaria articulata Fucus spiralis
Syllidae sp. Idotea sp. Musculus subpictus PISCES Callithamnion sp. Fucus vesiculosus

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