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IPA Factsheet - Lleyn Sea Cliffs
Site code
CountryUnited Kingdom
Administrative regionWales (Caernarvonshire)
Central co-ordinates52o 47' N / 4o 41' W map
Altitude0 - 240

 Site Description The mountains of the Lleyn Peninsula fall sheer into the sea, broken by wide bays and rocky coves. Bardsey Island at its tip is similarly rocky, with crags and low cliffs giving home to a variety of flowering plants.

 Botanical Significance The area provides a suitable habitat for lichens, and the cliffs and heaths around Aberdaron are one of the few sites in the UK where the ciliate strap lichen together with the golden hair lichen, Teloschistes flavicans, can be found. The sites selected exhibit species-richness including the presence of rare and threatened species, and/or contain a high number of Maritime Indicator species. Examples containing northern, western and southern elements of the lichen flora have been selected. The sites support rich assemblages of species from exclusively maritime communities including the Verrucarietum maurae, Calplacetum marinae, Ramalinetum scopularis and Sclerophytetum circumscriptae. Assemblages from several undescribed terricolous communities are also represented. The sites selected all have high scores on the provisional Maritime Lichen Index.

 General Habitat Description This habitat includes maritime sites encompassing species and communities from the littoral zone to xeric-supralittoral zone on rocky shores.

Land use

Land use% CoverLevel
agriculture (animals)Minor
nature conservation and researchMajor

Threatened Species

Species NameIPA Assess.Species Assess.AbundanceData qualityCriteria

Botanical Richness

EUNIS level 2 code & nameIPA Assess.Habitat Assess.% of indicator speciesNo. SpeciesNational BiotopeData qualityCriteria
B3 Rock cliffs, ledges & shores, including the supralittoral200700unknownB
F4 Temperate shrub heathland200700unknownB

Threatened Habitats

IPA Habitat code & nameIPA Assess.Habitat Assess.AreaData qualityCriteria


DesignationProtected Area NameRelationship with IPAOverlap with IPA
Special Area of ConservationClogwyni Pen Llyn / Seacliffs of Lleynprotected area contained by IPA1045
Special Area of ConservationCorsydd Llyn / Lleyn Fensprotected area is adjacent to IPA0
Special Area of ConservationPen Llyn ar Sarnau / Lleyn Peninsular and the Sarprotected area is adjacent to IPA335
Special Protection AreaGlannau Aberdaron and Ynys Enlli / Aberdaron Coastprotected area contained by IPA503
Special Protection AreaMynydd Cilan, Trwyn y Wylfa ac Ynysoedd Sant Tudwaprotected area overlaps with IPA352
Site of Special Scientific InterestAber Geirchprotected area is adjacent to IPA0
Site of Special Scientific InterestBenallt Mine and Nant y Gadwen protected area is adjacent to IPA0
Site of Special Scientific InterestCarreg Llamprotected area contained by IPA14
Site of Special Scientific InterestGallt y Bwlchprotected area contained by IPA23
Site of Special Scientific InterestGlannau Aberdaronprotected area contained by IPA302
Site of Special Scientific InterestMynydd Penarfynnyddprotected area contained by IPA161
Site of Special Scientific InterestMynydd Tir y Cwmwd ar Glannau at Carreg yr Imbillprotected area overlaps with IPA94
Site of Special Scientific InterestPorth Ceiriad, Porth Neigwl ac Ynysoedd Sant Tudwaprotected area overlaps with IPA536
Site of Special Scientific InterestPorth Dinllaen i Borth Pistyllprotected area contained by IPA127
Site of Special Scientific InterestPorth Towyn i Borth Wenprotected area contained by IPA73
Site of Special Scientific InterestWig Bach ar Glannau i Borth Alwmprotected area contained by IPA43
Site of Special Scientific InterestYnys Enlli - Bardsey Islandprotected area contained by IPA206
Site of Special Scientific InterestYnysoedd y Gwylandd, Gwylan Islandsprotected area overlaps with IPA3
National Nature ReserveYnys Enlli-Bardseyprotected area contained by IPA179
Area of Outstanding Natural BeautyLlynprotected area contains IPA1592


TypeDescriptionYear startedYear finishes
Protected Area Management PlanCore Management Plan for Corsydd Lleyn2008
Habitat Management PlanMaritime Cliffs and Slopes2002
Species Management PlanRanunculus tripartitus (Three-lobed Water-crowfoot2002
Protected Area Management PlanLleyn Peninsula and the Sarnau marine site2009
Habitat Management PlanCoastal Sand Dunes HAP2002
Habitat Management PlanLowland Heathland HAP2002
Species Management PlanLimonium binervosum agg. SAP2002
Species Management PlanPilularia globulifera (Pillwort) SAP2002


habitat fragmentation/isolationhigh
agricultural intensification/expansion (grazing)high
intrinsic species factors (slow growth, density)high
burning of vegetationhigh

 Conservation Issues

Contact Information

ContactContact Type
Cath ShellswellSite report compiler