Marine Biodiversity Data Portal - NI

Down Rock, Outer Ards.

Survey number: 555 Event number: 19860507/21 Date: 1986-05-07 GPS: 54.35400,-5.48500. Depth: 3.5 to 0.2 m. [ View map ]

Site Description: A mixture of sharply ridged sandstone ridges and boulder areas between an extensive intertidal with a mixture of exposures, sheltered in the boulder areas and moderate on the rock ridges. The shore is backed by glacial deposited shingle with grasslands behind. It is situated on a headland on the open coast adjacent to a small sandy bay with similar ridges to the south. The upper shore ridges are smaller and more brittle whereas the lower shore ridges are large with steep sides. Boulders occur between the ridges especially in the middle shore. The shore is fucoid dominated with patellobarnacle in the more exposed areas. The upper shore has an extensive supralittoral lichen zone.

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Species list (137 species recorded)

PORIFERA Spirorbis spirorbis Lacuna (Epheria) vincta Celleporella hyalina Palmaria palmata Ceramium sp. Halidrys siliquosa
Leucosolenia sp. Spirorbis tridentatus Littorina (Littorina) littorea Cryptosula pallasiana Ahnfeltia plicata Plumaria plumosa Ascophyllum nodosum
Sycon ciliatum OLIGOCHAETA sp. Littorina (Neritrema) mariae Schizoporella unicornis Hildenbrandia rubra Ptilota gunneri Fucus serratus
Leuconia nivea CRUSTACEA Littorina (Neritrema) neglecta Phaeostachys spinifera Corallina officinalis Membranoptera alata Fucus spiralis
Myxilla incrustans Chthamalus stellatus Littorina (Neritrema) obtusata Microporella ciliata Leptophytum sp. Odonthalia dentata Fucus vesiculosus
Halichondria panicea Elminius modestus Skeneopsis planorbis ECHINODERMATA Lithophyllum sp. Osmundea pinnatifida Pelvetia canaliculata
Acervochalina limbata Semibalanus balanoides Cingula (Cingula) cingillus Asterina gibbosa Lithophyllum incrustans Polysiphonia lanosa CHLOROPHYTA
Haliclona sp. Apherusa cirrus Onoba (Onoba) semicostata Ophiothrix fragilis Lithophyllum orbiculatum Polysiphonia stricta Ulothrix flacca
CNIDARIA Stenothoe monoculoides Nucella lapillus Amphipholis squamata Lithothamnion glaciale CHROMOPHYTA Ulothrix speciosa
Dynamena pumila Hyale prevostii Buccinum undatum TUNICATA Melobesia membranacea Ectocarpus fasciculatus Phaeophila sp.
Obelia dichotoma Orchestia mediterranea Mytilus edulis Sidnyum sp. Phymatolithon lenormandii Hincksia hincksiae Enteromorpha sp.
Actinia equina Amphithoe rubricata Anomiidae sp. Sidnyum turbinatum Titanoderma corallinae Pylaiella littoralis Enteromorpha intestinalis
Urticina felina Jaera albifrons Turtonia minuta Didemnum maculosum Titanoderma pustulatum Elachista fucicola Enteromorpha prolifera
NEMERTEA Idotea granulosa BRYOZOA Dendrodoa grossularia Catenella caespitosa Chilionema reptans Ulva fasciata
NEMERTEA sp. Ligia oceanica Crisia denticulata Botryllus schlosseri Cystoclonium purpureum Ralfsia verrucosa Chaetomorpha linum
ANNELIDA Porcellana platycheles Alcyonidium hirsutum Botrylloides leachi Dilsea carnosa Leathesia difformis Cladophora rupestris
Harmothoe extenuata Cancer pagurus Flustrellidra hispida PISCES Dumontia contorta Cladostephus spongiosus Cladophora sericea
Harmothoe imbricata Carcinus maenas Walkeria uva Nerophis lumbriciformis Furcellaria lumbricalis Dictyota dichotoma Rhizoclonium riparium
Syllis gracilis MOLLUSCA Membranipora membranacea RHODOPHYTA Chondrus crispus Desmarestia aculeata
Nereis pelagica Calliostoma zizyphinum Electra pilosa Porphyra leucosticta Mastocarpus stellatus Laminaria digitata
Cirratulus cirratus Testudinalia testudinalis Callopora lineata Acrochaetium secundata Plocamium cartilagineum Laminaria hyperborea
Pomatoceros triqueter Patella (Patella) vulgata Cauloramphus spiniferum Gelidium pusillum Lomentaria articulata Laminaria saccharina

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