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Special Areas of Conservation

Llyn Dinam

Designated Special Area of Conservation (SAC)
Country Wales
Unitary Authority West Wales and The Valleys
Centroid* SH310774
Latitude 53.26638889
Longitude -4.534166667
SAC EU Code UK0030186
Status Designated Special Area of Conservation (SAC)
Area (ha) 36.72
* This is the approximate central point of the SAC. In the case of large, linear or composite sites, this may not represent the location where a feature occurs within the SAC.
Location of Llyn Dinam SAC

General site character

  • Inland water bodies (Standing water, Running water) (28.6%)
  • Bogs, Marshes, Water fringed vegetation, Fens (31%)
  • Dry grassland, Steppes (20.4%)
  • Humid grassland, Mesophile grassland (14%)
  • Broad-leaved deciduous woodland (6%)

Download the Standard Data Form for this site (PDF <100kb)

Note When undertaking an appropriate assessment of impacts at a site, all features of European importance (both primary and non-primary) need to be considered.

Annex I habitats that are a primary reason for selection of this site

  • 3150 Natural eutrophic lakes with Magnopotamion or Hydrocharition - type vegetation

    Llyn Dinam is a coastal eutrophic lake in north Wales. Common reed Phragmites australis, and to a lesser extent common club-rush Scirpus lacustris ssp. lacustris, dominate the shoreline. Rigid hornwort Ceratophyllum demersum is abundant in shallow open water, often in association with autumnal starwort Callitriche hermaphroditica and ivy-leaved duckweed Lemna trisulca. The white and yellow water-lilies Nymphaea alba and Nuphar lutea dominate in a sheltered arm on the west side. Fennel-leaved pondweed Potamogeton pectinatus, perfoliate pondweed P. perfoliatus and lesser pondweed P. pusillus have been recorded. Stoneworts Chara spp. are present. Water chemistry characteristics are consistent with those expected in eutrophic lakes, including relatively high pH, alkalinity and phosphorus levels. Llyn Dinam is the least-enriched of a series of Anglesey Lakes which have been subjected to sediment diatom analysis

Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site

  • Not Applicable

Annex II species that are a primary reason for selection of this site

  • Not Applicable

Annex II species present as a qualifying feature, but not a primary reason for site selection

  • Not Applicable

Many designated sites are on private land: the listing of a site in these pages does not imply any right of public access.