Marine Biodiversity Data Portal - NI

St. John's Point, SE Coast.

Survey number: 555 Event number: 19850530/21 Date: 1985-05-30 GPS: 54.22383,-5.66300. Depth: 3.5 to 0.2 m. [ View map ]

Site Description: The transect site runs across the intertidal at the southern tip of St. John's Point, between the lighthouse and a newly constructed wall. The top of the transect is on a raised ridge outcrop on the upper shore, behind which lies fractured ridges and stones with scattered Pelvetia. Behind this in turn is a patchy salt marsh. Below the rock ridge outcrop the transect runs over rock ridges with boulders between the ridges and pools between the ridges. The upper shore is dominated by patellobarnacle with Nucella, and the lower shore by fucoids and Laminaria. The site is notable for a high diversity of animals, especially beneath boulders on the lower shore.

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Species list (166 species recorded)

PORIFERA Branchiomma bombyx Calliostoma zizyphinum Callopora lineata Bonnemaisonia hamifera Odonthalia dentata Laminaria digitata
Sycon ciliatum Pomatoceros triqueter Testudinalia testudinalis Celleporella hyalina Gelidium pusillum Osmundea hybrida Laminaria saccharina
Grantia compressa Filograna implexa Tectura virginea Escharoides coccinea Palmaria palmata Osmundea pinnatifida Halidrys siliquosa
Ophlitaspongia papilla Spirorbis spirorbis Patella (Patella) vulgata Schizoporella unicornis Rhodothamniella floridula Polysiphonia stricta Ascophyllum nodosum
Myxilla incrustans Spirorbis tridentatus Patella pellucida Celleporina hassallii Ahnfeltia plicata Rhodomela confervoides Fucus serratus
Halichondria panicea CRUSTACEA Lacuna (Lacuna) parva ECHINODERMATA Hildenbrandia rubra CHROMOPHYTA Fucus vesiculosus
Haliclona simulans Amphiascoides neglecta Littorina (Littorina) littorea Asterina gibbosa Corallina officinalis Ectocarpus siliculosus Pelvetia canaliculata
Halisarca dujardinii Verruca stroemia Littorina (Neritrema) neglecta Asterias rubens Leptophytum sp. Hincksia sp. CHLOROPHYTA
Haliclona sp. Chthamalus stellatus Littorina (Neritrema) obtusata Ophiothrix fragilis Lithothamnion glaciale Laminariocolax tomentosoides Spongomorpha aeruginosa
CNIDARIA Semibalanus balanoides Skeneopsis planorbis Ophiocomina nigra Melobesia membranacea Pylaiella littoralis Monostroma grevillei
Dynamena pumila Apherusa bispinosa Rissoa interrupta Amphipholis squamata Phymatolithon lenormandii Spongonema tomentosum Monostroma oxyspermum
Campanularia volubilis Apherusa jurinei Onoba (Onoba) semicostata Psammechinus miliaris Titanoderma corallinae Elachista fucicola Ulothrix flacca
Obelia dichotoma Dexamine thea Nucella lapillus TUNICATA Titanoderma pustulatum Dictyosiphon foeniculaceus Chlorofilum ephemerum
Actinia equina Amphithoe rubricata Buccinum undatum Sidnyum turbinatum Catenella caespitosa Myriotrichia clavaeformis Capsosiphon fulvescens
Urticina felina Jassa falcata Mytilidae sp. Didemnum maculosum Cystoclonium purpureum Pogotrichum filiforme Enteromorpha sp.
NEMERTEA Jaera sp. Mytilus edulis Dendrodoa grossularia Dumontia contorta Chilionema reptans Enteromorpha intestinalis
NEMERTEA sp. Idotea granulosa Anomia ephippium Botryllus schlosseri Mastocarpus stellatus Petalonia fascia Enteromorpha linza
ANNELIDA Ligia oceanica Turtonia minuta Botrylloides leachi Phyllophora pseudoceranoides Ralfsia sp. Enteromorpha prolifera
Harmothoe extenuata Pagurus bernhardus Hiatella arctica PISCES Plocamium cartilagineum Scytosiphon lomentaria Percursaria percursa
Harmothoe imbricata Pisidia longicornis BRYOZOA Lipophrys pholis Chylocladia verticillata Isthmoplea sphaerophora Ulva fasciata
Lepidonotus squamatus Porcellana platycheles Crisia denticulata Pholis gunnellus Lomentaria articulata Leathesia difformis Cladophora rupestris
Nereis pelagica Cancer pagurus Crisia eburnea RHODOPHYTA Ceramium sp. Cladostephus spongiosus Cladophora sericea
Flabelligera affinis Necora puber Alcyonidium gelatinosum Erythrotrichia carnea Plumaria plumosa Sphacelaria cirrosa Rhizoclonium riparium
Capitella capitata Carcinus maenas Alcyonidium hirsutum Porphyra insolita Cryptopleura ramosa Sphacelaria fusca
Arenicola marina Pilumnus hirtellus Flustrellidra hispida Porphyra leucosticta Membranoptera alata Dictyota dichotoma
Lanice conchilega MOLLUSCA Electra pilosa Acrochaetium secundata Phycodrys rubens Alaria esculenta

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