Mappp.co geology and wildlife sites

Samuel's Port

…ommon periwinkle Littorina littorea is abundant in patches and juvenile mussels Mytilus edulis are found in crevices. The periwinkle Littorina fabalis is also found here. In the upper shore rock pools, there is abundant coral weed Corallina officinalis and green seaweeds such as …

Aber Afon Conwy

… important ‘piddock’ communities on; eulittoral peat, eulittoral firm clay with Mytilus edulis, lower eulittoral soft rock with Fucus serratus and sublittoral fringe soft rock with Laminaria digitata. In addition the site supports specialised communities of shallow pools on mixed…

Lough Foyle

…uds. While rocky substrate is very limited, the extensive beds of common mussel Mytilus edulis provide a stable surface for acorn barnacle Semibalanus balanoides and edible periwinkle Littorina littorea. The polychaete green leaf worm Eulalia viridis is a common associate. The so…

Hamford Water

… Scrobicularia plana and the gastropod mollusc Peringia ulvae. There are mussel Mytilus edulis beds and, in Kirby Creek, oyster Ostrea edulis lays. The mud flats also support a number of local plants such as small cord grass Spartina maritima, narrow leaved eelgrass Zostera angu…

Taw-Torridge Estuary

…nd stones on the banks provide a substrate for algal growth and beds of mussels Mytilus edulis.

Aber Mawddach / Mawddach Estuary

…d level, except in a few places along the river channel -here the edible mussel Mytilus edulis forms large dense clumps. Mid-shore sand and mudflats in much of the estuary are dominated by lugworm Arenicola marina and bivalves such as common cockle Cerastoderma edule, Baltic tell…

Pwll-du Head and Bishopston Valley

…ulse Osmundea pinnatifida. Where honeycomb worm is not dominant, edible mussels Mytilus edulis grow. These occur either in association with the barnacle Austrominius modestus or with a dense canopy of serrated wrack. Oarweed Laminaria digitata occurs on sublittoral fringe rocky r…

St. John's Point

…mon starfish Asterias rubens, edible sea urchin Echinus esculentus, blue mussel Mytilus edulis and sea oak Halidrys siliquosa are all present in this area. At Castle Park the shore widens slightly with the lower shore characterised by flat rock outcrops and steep ridges. Inlets a…

Tiroedd a Glannau Rhwng Cricieth ac Afon Glaslyn

…balanoides and limpets Patella sp. dominating the zone below. The common mussel Mytilus edulis occurs just above the sand-scoured rock at the base. Highly diverse rockpools are found in horizontal areas of bedrock and are dominated by encrusting coralline seaweeds and coral weed …

Mynydd Tir y Cwmwd a'r Glannau at Garreg yr Imbill

…sii. Further east from Llanbedrog the shore is split into large areas of mussel Mytilus edulis beds and mixed sediment in the middle and lower shore. The mussel beds are raised slightly and as a result of this the flatter, mixed sandy shore behind and to the side of the mussel be…

Mersey Narrows

…osed of boulder clay debris and rubble which supports high densities of mussels Mytilus edulis, barnacles Balanus, Elminius, Chthamalus, ragworm and other invertebrates. This community is unusual in the North West. A number of shingle banks located towards Seacombe Ferry also occ…

Arfordir Marros-Pentywyn / Marros-Pendine Coast

…piddock, Barnea candida, a boring bivalve mollusc, is part of the common mussel Mytilus edulis and red algal Ceramium sp. community which occurs in the exposed lower shore peatbeds and is of national importance. The lower shore near Pendine is particularly important for the bival…

Tenby Cliffs and St. Catherine's Island

…common. Away from the caves and tunnels further up the shore, a band of mussels Mytilus edulis occurs below a barnacle and limpet Patella sp. zone, with barnacle species including Semibalanus balanoides, Eliminius modestus and Chthamalus sp. Pools amongst the barnacle and limpet …

Arfordir Pen-bre / Pembrey Coast

…of cobbles that extend down the shore and have been colonised by edible mussels Mytilus edulis. Of note here are the rock pools on mixed substrata within the edible mussel beds with the species, keelworms Pomatoceros sp., shrimp Crangon crangon and edible periwinkle Littorina lit…

Y Foryd

…itat diversity is increased further in some areas due to the presence of mussel Mytilus edulis beds, and the occasional presence of bladder wrack Fucus vesiculosus. The saltmarsh at the site is largely dominated by common cord-grass Spartina anglica, with the fringes of the upper…

Morecambe Bay

…uddy areas can be found near Walney Island and towards the Lune Estuary. Mussel Mytilus edulis beds are a major feature of the Bay with very large areas off Morecambe, Heysham and Foulney Island. The flats are divided by three main river channels namely the Keer, Kent and Leven, …

Waterwynch Bay to Saundersfoot Harbour

…ch as Plocamium cartilagineum, Lomentaria articulata and pepper dulse. A mussel Mytilus edulis -dominated zone occurs higher up the rocky shores and at the base of the cliffs backing the sandy bays. Further up the rock, mussels are replaced by a zone of barnacles Chthamalus sp. a…

Loch Obisary

…rackish water species, including the brown alga Fucus ceranoides and the mussel Mytilus edulis. A marine community occurs at and below the saline transition zone (halocline) in the northern basin. It is composed of marine, salt-tolerant species, numerically dominated by the red a…

Lower Fal & Helford Intertidal

… such shores is often limited with only the shore crab Carcinus maenas, mussels Mytilus edulis and the barnacle Austrominius modestus being widespread. Downstream of Merthen Wood the fauna also includes gastropods such as Littorina littorea and L. obtusata, the barnacle Semibalan…

Loch Fleet

…ine snails, cockles Cerastoderma edule, razor shells Ensis spp. and mussel beds Mytilus edulis. These invertebrates are especially important during the winter months when they provide undisturbed feeding for migratory birds. Saltmarsh has developed around the sheltered shores of …

Glannau Tonfanau i Friog

…re and in places the seaweeds are replaced by a dense covering of edible mussel Mytilus edulis. Sarn y Bwch itself has a sparse covering of barnacles on its cobble substrate and on the south side of the Sarn a small mussel bed is present. The honeycomb worm occurs on the mid and …

De Porth Sain Ffraid / St Bride's Bay South

…e in places, often with serrated wrack Fucus serratus and patches of the mussel Mytilus edulis. In other parts of the site, this zone supports a mixture of red algae, including dulse Palmaria palmata and pepper dulse Osmundea pinnatifida, caragheen moss Mastocarpus stellatus and …

Upper Solway Flats & Marshes

…gh there are areas of mud and silt as well as a number of boulder strewn mussel Mytilus edulis beds. The flats are bisected by six main river channels and numerous creeks divide the marshes which are only fully inundated at exceptionally high tides. Areas of shingle and sand dune…

Exe Estuary

… Echinocardium cordatum and masked crab Corystes cassivelaunus. Beds of mussels Mytilus edulis are important feeding grounds for oystercatchers Haematopus ostralegus. The Estuary is the only British locality for the polychaete worm Ophelia bicornia which occurs mainly on Bull Hil…

Porth Ceiriad, Porth Neigwl ac Ynysoedd Sant Tudwal

… grey and black lichens above barnacles, limpets Patella sp. and edible mussels Mytilus edulis is present on all bedrock and stable boulders of the site. The sandstone sea cliffs to the east of Porth Ceiriad face south-east and are moderately exposed to wave action. Below the li…

Pen y Gogarth / Great Ormes Head

…agui, Semibalanus balanoides and limpets Patella vulgata, and the common mussel Mytilus edulis. The western extent of the intertidal adjacent to Hornby Cave has the greatest wave exposure, here acorn barnacles and common mussels dominate the mid shore, whereas less exposed eastwa…

Grassholm / Ynys Gwales

…re dominated by a dense covering of dabberlocks Alaria esculenta, small mussels Mytilus edulis and an abundance of coralline algae. A dense community of barnacles, small mussels, and associated coralline algae occur above this zone. Limpets Patella spp. and barnacles encrust the …

Larne Lough

…e lower shore. The associated fauna includes bivalves, especially common mussel Mytilus edulis, the polychaete worm Polydora ciliata, and the seasquirts Ascidiella scabra and Ascidiella conchilega. The priapulid worm Priapulus caudatus has been noted from the muds at Old Church B…

Cromarty Firth

…marine worms, marine snails, cockles Cerastoderma edule, as well as mussel beds Mytilus edulis. These, together with the extensive communities of pioneer plant species such as narrow-leaved eelgrass Zostera marina, dwarf eelgrass Zostera noltii and tasselweed Ruppia maritima, pro…

Outer Belfast Lough

… Although the greatest numbers are found on the extensive beds of common mussel Mytilus edulis, the species is widespread on all shore types, as is the redshank Tringa totanus, with over 300 birds. Other species are more selective in their requirements: ringed plover Charadrius h…

Aberarth - Carreg Wylan

…re present, with frequent patches of sparse brown seaweeds or the edible mussel Mytilus edulis. Gravels, cobbles and boulders, particularly higher up the shore, are highly mobile, heavily scoured and often barren. Black tar lichen Verrucaria maura occurs on the upper shore on mo…

Arfordir Gogleddol Penmon

…nacle Semibalanus balanoides, common limpets Patella vulgata and common mussels Mytilus edulis occurs on steep mid-shore sections. These sections are interspersed with gently sloping limestone platforms which are less exposed to wave action, and here the seaweed serrated wrack Fu…

Arfordir Niwgwl - Aber Bach / Newgale - Little Haven Coast

…minaria digitata and L. hyperborea. Amongst the kelps clusters of common mussel Mytilus edulis, dahlia anemone Urticina felina and gem anemone Bunodactis verrucosa occur. Further up the shore many of the lower shore rocks are dominated by serrated wrack Fucus serratus and turf-fo…

Skomer Island and Middleholm

…ine algae, dabberlocks Alaria esculenta and dense aggregations of small mussels Mytilus edulis, or by kelp Laminaria digitata and dabberlocks overlying coralline and filamentous red algae. Less exposed areas support kelp with Himanthalia elongata overlying a similar community. A…

Borth - Clarach

…. Below the barnacle and limpet zone there are large areas of the edible mussel Mytilus edulis, occasionally covered with brown and green algae. Surge gulleys are commonly incised through the bedrock across the site. These gulleys support a healthy population of the honeycomb wor…

Glanllynnau a Glannau Pen-ychain i Gricieth

…ladder wrack Fucus vesiculosus on more sheltered outcrops and the common mussel Mytilus edulis in more exposed areas. On the mid to lower shore serrated wrack Fucus serratus dominates and is interspersed with the red algae, pepper dulce Osmundea pinnatifida, Irish moss Chondrus c…

Ramsey / Ynys Dewi

…perborea and furbelows Saccorhiza polyschides, often with barnacles and mussels Mytilus edulis beneath. In areas subject to greatest wave exposure, particularly on the south and west sides of the island, the kelps are replaced or augmented by stands of dabberlocks Alaria esculent…

Creigiau Rhiwledyn / Little Ormes Head

… the peninsula and are typified by faunal crusts dominated by the common mussel Mytilus edulis, acorn barnacles such as Semibalanus balanoides and anemones such as Metridium senile. The sea cliffs show an almost uninterrupted rocky shore zonation around the headland. The upper zo…

Skokholm

…minated by dense thong-weed Himanthalia elongata with an understorey of mussels Mytilus edulis and coralline algae. On the less exposed north-western side, kelp Laminaria digitata occurs with thong-weed over coralline and red algae. The more sheltered eastern side of the island s…

Obain Loch Euphoirt

… and the fronds of seaweeds may be densely colonised by species such as mussels Mytilus edulis, sea-squirts Ciona intestinalis and Ascidiella spp. and various sponges such as Halichondria panicea which thrive in the strong currents of the tidal rapids. The sill complex at the ent…

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