Cemlyn Bay
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Climate exposure
This is about exposure to a nationwide pressure this habitat type carries — not a verdict on this site's own management.
Coastal habitats are exposed to sea-level rise and storm erosion. Where hard sea defences sit behind them, there's nowhere landward to retreat to — a squeeze that keeps compressing the habitat no matter how well it's managed.
Habitats
Geology & landscape
Landscape processes: Coastal
Birds & fish recorded
Birds
| Species | Season |
|---|---|
| goldeneye | Breeding |
| goldeneye | Wintering |
| mallard | Breeding |
| mallard | Wintering |
| shoveler | Breeding |
| shoveler | Wintering |
| teal | Breeding |
| teal | Wintering |
| tufted duck | Breeding |
| tufted duck | Wintering |
| wigeon | Breeding |
| wigeon | Wintering |
Description
Description The inner part of the bay is a tidal lagoon enclosed by a shingle ridge forming a "bay head barrier" of storm beach shingle. Saltmarsh communities occur around the lagoon. The shingle ridge, lagoon and brackish pools further inland support a number of uncommon plant species including sea kale Crambe maritima, sea radish Raphanus maritimus, brackish water-crowfoot Ranunculus baudotii and Ruppia maritima. There are colonies of common, ‘arctic’ and sandwich terns which breed on low islands in the main lagoon. The number of breeding pairs of each species fluctuates from year to year but the site is particularly important for sandwich tern and often holds over 1% of the British breeding population. The water level in the lagoon is maintained by a weir which is controlled to prevent the ternery from flooding at high spring tides. Wintering wildfowl, notably wigeon, shoveler, goldeneye, teal, mallard and tufted duck use the area. Remarks The shingle ridge and lagoon are leased from the National Trust and managed as a nature reserve by the North Wales Wildlife Trust.
Species mentioned
Show the 11 species mentioned in the description, with red-list status| English name search for this in other sites |
Latin name search with Google |
IUCN / Red List | Type | Family |
|---|---|---|---|---|
| teal | Anas crecca | LC (NonBreeding), LC (Breeding) | bird-duck | anatidae |
| mallard | Anas platyrhynchos | NT (NonBreeding), LC (Breeding) | bird-duck | anatidae |
| tufted duck | Aythya fuligula | LC (NonBreeding), LC (Breeding) | bird-duck | anatidae |
| goldeneye | Bucephala clangula | VU (NonBreeding), VU (Breeding) | bird-duck | anatidae |
| wigeon | Mareca penelope | LC (NonBreeding), NT (Breeding) | bird-duck | anatidae |
| shoveler | Spatula clypeata | LC (NonBreeding), LC (Breeding) | bird-duck | anatidae |
| sandwich tern | Thalasseus sandvicensis | LC (Breeding) | bird-tern | laridae |
| sea kale | Crambe maritima | LC | herb | brassicaceae |
| brackish water buttercup | Ranunculus baudotii | LC | herb | ranunculaceae |
| sea radish | Raphanus maritimus | Not listed in GB list | herb | brassicaceae |
| beaked tassel-weeds | Ruppia maritima | LC | herb | ruppiaceae |
Plant communities
MC6 — Coastal vegetated shingle, Hard cliff and cliff slope
Atriplex prostrata-Beta vulgaris ssp. maritima sea-bird cliff community
Show 17 indicator speciesDaucus carota, Sonchus oleraceus, Taraxacum officianalis, Tripleurospermum maritimum, Cochlearia officinalis, Silene uniflora, Spergularia rupicola, Atriplex hastata, Malva arborea, Plantago coronopus, Armeria maritima, Polygonum aviculare, Rumex crispus, Bromus hordeaceous, Catapodium marinum, Dactylis glomerata, Festuca rubra
SD1 — Coastal vegetated shingle, Sand dune
Rumex crispus-Glaucium flavum shingle community
Show 35 indicator speciesSolanum dulcamara, Crithmum maritimum, Cirsium arvense, Cirsium vulgare, Helminthotheca echioides, Hypochaeris radicata, Jacobaea vulgaris, Lactuca serriola, Leontodon saxatilis, Senecio viscosus, Sonchus arvensis, Sonchus asper, Tripleurospermum maritimum, Crambe maritima, Cerastium fontanum, Honckenya peploides, Sagina apetala, Silene uniflora, Atriplex prostrata, Sedum acre, Euphorbia paralias, Lathyrus japonicus, Geranium robertianum, Glaucium flavum, Plantago coronopus, Plantago lanceolata, Rumex crispus, Potentilla anserina, Ammophila arenaria, Arrhenatherum elatius, Elytrigia atherica, Elytrigia juncea, Festuca rubra, Holcus lanatus, Lolium perenne
SD2 — Coastal vegetated shingle, Sand dune
Honkenya peploides-Cakile maritima strandline community
Show 30 indicator speciesSalsola kali, Achillea millefolium, Cirsium arvense, Eryngium maritimum, Hypochaeris radicata, Senecio vulgaris, Sonchus arvensis, Tripleurospermum maritimum, Cakile maritima, Cerastium diffusum, Honckenya peploides, Silene uniflora, Stellaria media agg., Atriplex glabriuscula, Atriplex laciniata, Atriplex littoralis, Atriplex patula, Atriplex prostrata, Sedum acre, Polygonum oxyspermum subsp. Raii, Rumex crispus, Potentilla anserina, Agrostis stolonifera, Ammophila arenaria, Arrhenatherum elatius, Elytrigia juncea, Elytrigia repens, Festuca rubra, Leymus arenarius, Poa annua
SD3 — Coastal vegetated shingle, Sand dune
Matricaria maritima-Galium aparine strandline community
Show 28 indicator speciesBolboschoenus maritimus, Juncus bufonius, Juncus gerardii, Ligusticum scoticum, Matricaria discoidea, Sonchus arvensis, Sonchus asper, Tripleurospermum maritimum, Mertensia maritima, Cakile maritima, Cochlearia officinalis, Honckenya peploides, Stellaria media agg., Atriplex glabriuscula, Atriplex patula, Atriplex prostrata, Triglochin maritimum, Plantago maritima, Armeria maritima, Rumex crispus, Glaux maritima, Galium aparine, Agrostis stolonifera, Elytrigia repens, Festuca rubra, Holcus lanatus, Leymus arenarius, Poa annua
SM1 — Salt marsh
Zostera communities
Show 15 indicator speciesZostera angustifolia, Zostera marina, Zostera noltei, Spartina anglica, Porphyra umbilicalis, Chondria dasyphylla, Polysiphonia nigra, Chara aspera, Chaetomorpha linum, Chaetomorpha tortuosa, Cladophora battersii, Cladophora retroflexa, Ulva intestinalis, Ulva lactuca, Fucus spiralis
SM3 — Salt marsh
Eleocharis parvula salt-marsh community
Show 1 indicator speciesEleocharis parvula
SM4 — Salt marsh
Spartina maritima salt-marsh community
Show 6 indicator speciesSuaeda maritima, Salicornia europaea, Salicornia perennis, Puccinellia maritima, Spartina anglica, Spartina maritima
SM5 — Salt marsh
Spartina alterniflora salt-marsh community
Show 3 indicator speciesPuccinellia maritima, Spartina alterniflora, Spartina anglica
SM6 — Salt marsh
Spartina anglica salt-marsh community
Show 14 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Cochlearia anglica, Spergularia media, Atriplex hastata, Salicornia europaea, Plantago maritima, Limonium vulgare, Puccinellia maritima, Spartina anglica, Catenella caespitosa, Fucus vesiculosus, Fucus vesiculosus ecad volubilis
SM7 — Salt marsh
Arthrocnemum perenne stands
Show 9 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Spergularia media, Salicornia europaea, Salicornia perennis, Limonium vulgare, Puccinellia maritima, Bostrychia scorpioides
SM8 — Salt marsh
Annual Salicornia salt-marsh community
Show 6 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Salicornia europaea, Puccinellia maritima, Spartina anglica
SM9 — Salt marsh
Suaeda maritima salt-marsh community
Show 6 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Salicornia europaea, Puccinellia maritima, Spartina anglica
SM10 — Salt marsh
Transitional low-marsh vegetation with Puccinellia maritima annual Salicornia species and Suaeda maritima
Show 10 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Spergularia media, Salicornia europaea, Triglochin maritimum, Armeria maritima, Limonium vulgare, Puccinellia maritima, Spartina anglica
SM11 — Salt marsh
Aster tripolium var. discoideus salt-marsh community
Show 12 indicator speciesAtriplex portulacoides, Suaeda maritima, Aster tripolium, Spergularia media, Salicornia europaea, Salicornia perennis, Plantago maritima, Puccinellia maritima, Spartina anglica, Bostrychia scorpioides, Fucus vesiculosus, Pelvetia canaliculata
SM12 — Salt marsh
Rayed Aster Tripolium on slat marshes
Show 13 indicator speciesSchoenoplectus lacustris, Juncus bufonius, Suaeda maritima, Aster tripolium, Spergularia marina, Spergularia media, Atriplex hastata, Salicornia europaea, Triglochin maritimum, Plantago maritima, Puccinellia distans, Puccinellia maritima, Spartina anglica
SM13 — Salt marsh
Puccinellia maritima salt-marsh community
Show 23 indicator speciesAtriplex portulacoides, Juncus gerardii, Suaeda maritima, Aster tripolium, Cochlearia anglica, Cochlearia officinalis, Spergularia media, Atriplex hastata, Salicornia europaea, Salicornia perennis, Triglochin maritimum, Plantago maritima, Armeria maritima, Limonium humile, Limonium vulgare, Glaux maritima, Agrostis stolonifera, Festuca rubra, Puccinellia maritima, Spartina anglica, Spartina maritima, Bostrychia scorpioides, Fucus cottonii
SM14 — Salt marsh
Halimione portulacoides salt-marsh community
Show 16 indicator speciesAtriplex portulacoides, Juncus maritimus, Suaeda maritima, Artemisia maritima, Aster tripolium, Inula crithmoides, Spergularia media, Salicornia europaea, Salicornia perennis, Triglochin maritimum, Plantago maritima, Armeria maritima, Limonium vulgare, Elytrigia atherica, Puccinellia maritima, Spartina anglica
SM15 — Salt marsh
Juncus maritimus-Triglochin maritima salt-marsh community
Show 24 indicator speciesAtriplex portulacoides, Carex extensa, Juncus gerardii, Juncus maritimus, Suaeda maritima, Oenanthe lachenalii, Artemisia maritima, Cochlearia anglica, Cochlearia officinalis, Spergularia media, Atriplex hastata, Salicornia europaea, Triglochin maritimum, Plantago maritima, Armeria maritima, Limonium humile, Limonium vulgare, Glaux maritima, Agrostis stolonifera, Festuca rubra, Phragmites australis, Puccinellia maritima, Spartina anglica, Fucus cottonii
SM16 — Salt marsh
Festuca rubra salt-marsh community
Show 30 indicator speciesAtriplex portulacoides, Carex distans, Carex flacca, Juncus gerardii, Hypnum cupressiforme, Kindbergia praelonga, Rhytidiadelphus squarrosus, Scorzoneroides autumnalis, Cochlearia anglica, Cerastium fontanum, Sagina procumbens, Spergularia media, Atriplex hastata, Salicornia europaea, Lotus corniculatus, Trifolium repens, Triglochin maritimum, Plantago lanceolata, Plantago maritima, Armeria maritima, Limonium vulgare, Glaux maritima, Ranunculus acris, Potentilla anserina, Agrostis stolonifera, Anthoxanthum odoratum, Cynosurus cristatus, Festuca rubra, Holcus lanatus, Puccinellia maritima
SM17 — Salt marsh
Artemisia maritima salt-marsh community
Show 24 indicator speciesAtriplex portulacoides, Juncus gerardii, Juncus maritimus, Suaeda maritima, Suaeda vera, Artemisia maritima, Cochlearia anglica, Cochlearia officinalis, Spergularia media, Atriplex hastata, Salicornia europaea, Triglochin maritimum, Plantago coronopus, Plantago maritima, Armeria maritima, Limonium vulgare, Glaux maritima, Agrostis stolonifera, Elytrigia atherica, Elytrigia repens, Festuca rubra, Hordeum marinum, Parapholis strigosa, Puccinellia maritima
SM18 — Salt marsh
Juncus maritimus salt-marsh community
Show 32 indicator speciesCarex distans, Carex extensa, Carex otrubae, Juncus gerardii, Juncus maritimus, Amblystegium serpens, Kindbergia praelonga, Oenanthe lachenalii, Cirsium arvense, Scorzoneroides autumnalis, Sonchus arvensis, Cochlearia officinalis, Silene flos-cuculi, Atriplex hastata, Lotus corniculatus, Trifolium repens, Vicia cracca, Triglochin maritimum, Plantago maritima, Armeria maritima, Rumex crispus, Glaux maritima, Samolus valerandi, Ranunculus acris, Potentilla anserina, Galium palustre, Agrostis stolonifera, Elytrigia repens, Festuca rubra, Holcus lanatus, Poa pratensis, Schedonorus arundinaceus
SM19 — Saline lagoon, Salt marsh
Blysmus rufus salt-marsh community
Show 26 indicator speciesBlysmus rufus, Carex extensa, Carex lepidocarpa, Carex nigra, Eleocharis quinqueflora, Eleocharis uniglumis, Juncus articulatus, Juncus gerardii, Amblystegium serpens, Calliergonell cuspidatum, Drepanocladus polygamus, Leptodictyum riparium, Oenanthe lachenalii, Scorzoneroides autumnalis, Cochlearia anglica, Trifolium repens, Triglochin maritimum, Triglochin palustre, Plantago maritima, Armeria maritima, Glaux maritima, Potentilla anserina, Agrostis stolonifera, Alopecurus geniculatus, Festuca rubra, Puccinellia maritima
SM20 — Saline lagoon, Salt marsh
Eleocharis uniglumis salt-marsh community
Show 25 indicator speciesBolboschoenus maritimus, Carex distans, Carex extensa, Carex nigra, Eleocharis quinqueflora, Eleocharis uniglumis, Juncus articulatus, Juncus gerardii, Leptodictyum riparium, Oenanthe lachenalii, Hydrocotyle vulgaris, Scorzoneroides autumnalis, Atriplex hastata, Trifolium repens, Triglochin maritimum, Triglochin palustre, Plantago maritima, Armeria maritima, Glaux maritima, Samolus valerandi, Potentilla anserina, Galium palustre, Agrostis stolonifera, Alopecurus geniculatus, Festuca rubra
SM21 — Salt marsh
Suaeda vera-Limonium binervosum salt-marsh community
Show 21 indicator speciesAtriplex portulacoides, Frankenia laevis, Suaeda maritima, Suaeda vera, Artemisia maritima, Cochlearia anglica, Cochlearia danica, Cochlearia officinalis, Sagina maritima, Spergularia marina, Spergularia media, Salicornia europaea, Plantago maritima, Armeria maritima, Limonium bellidifolium, Limonium binervosum, Limonium vulgare, Glaux maritima, Elytrigia atherica, Festuca rubra, Puccinellia maritima
SM22 — Salt marsh
Halimione portulacoides-Frankenia laevis salt-marsh community
Show 14 indicator speciesAtriplex portulacoides, Frankenia laevis, Suaeda maritima, Spergularia media, Salicornia europaea, Salicornia perennis, Plantago coronopus, Plantago maritima, Armeria maritima, Limonium vulgare, Elytrigia juncea, Festuca rubra, Parapholis strigosa, Puccinellia maritima
SM23 — Salt marsh
Spergularia marina-Puccinellia distans salt-marsh community
Show 18 indicator speciesAtriplex portulacoides, Juncus bufonius, Suaeda maritima, Spergularia marina, Spergularia media, Atriplex hastata, Salicornia europaea, Triglochin maritimum, Plantago maritima, Polygonum aviculare, Glaux maritima, Agrostis stolonifera, Alopecurus geniculatus, Elytrigia atherica, Festuca rubra, Parapholis strigosa, Puccinellia distans, Puccinellia maritima
SM24 — Salt marsh
Elymus pycnanthus salt-marsh community
Show 24 indicator speciesAtriplex portulacoides, Juncus gerardii, Juncus maritimus, Hypnum cupressiforme, Suaeda vera, Artemisia maritima, Aster tripolium, Sonchus arvensis, Atriplex hastata, Atriplex littoralis, Beta vulgaris sp maritima, Plantago maritima, Armeria maritima, Limonium vulgare, Glaux maritima, Potentilla anserina, Galium aparine, Agrostis stolonifera, Ammophila arenaria, Elytrigia atherica, Festuca rubra, Parapholis strigosa, Phragmites australis, Puccinellia maritima
SM25 — Salt marsh
Suaeda vera drift-line community
Show 20 indicator speciesAtriplex portulacoides, Suaeda maritima, Suaeda vera, Artemisia maritima, Cochlearia anglica, Cochlearia danica, Cochlearia officinalis, Spergularia media, Atriplex littoralis, Salicornia europaea, Salicornia perennis, Triglochin maritimum, Plantago maritima, Limonium vulgare, Glaux maritima, Elytrigia atherica, Festuca rubra, Puccinellia maritima, Bostrychia scorpioides, Pelvetia canaliculata
SM26 — Salt marsh
Inula crithmoides stands
Show 14 indicator speciesAtriplex portulacoides, Suaeda maritima, Inula crithmoides, Spergularia media, Salicornia europaea, Salicornia perennis, Plantago maritima, Armeria maritima, Limonium vulgare, Elytrigia atherica, Festuca rubra, Puccinellia maritima, Spartina anglica, Bostrychia scorpioides
SM28 — Salt marsh
Elymus repens salt-marsh community
Show 51 indicator speciesBolboschoenus maritimus, Carex otrubae, Eleocharis uniglumis, Juncus gerardii, Kindbergia praelonga, Odontites verna, Anthriscus sylvestris, Apium graveolens, Heracleum sphondylium, Oenanthe crocata, Oenanthe lachenalii, Torilis japonica, Centaurea nigra, Cirsium arvense, Cirsium vulgare, Scorzoneroides autumnalis, Sonchus arvensis, Tripleurospermum maritimum, Cochlearia anglica, Cochlearia officinalis, Silene uniflora, Stellaria media agg., Atriplex hastata, Atriplex littoralis, Calystegia sepium, Lotus corniculatus, Medicago lupulina, Melilotus altissima, Trifolium repens, Vicia cracca, Triglochin maritimum, Plantago lanceolata, Plantago maritima, Rumex conglomeratus, Rumex crispus, Glaux maritima, Potentilla anserina, Galium aparine, Urtica dioica, Agrostis stolonifera, Alopecurus geniculatus, Arrhenatherum elatius, Dactylis glomerata, Deschampsia cespitosa, Elytrigia repens, Festuca rubra, Holcus lanatus, Lolium perenne, Poa pratensis, Puccinellia maritima, Schedonorus arundinaceus