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
|6130 Calaminarian grasslands of the Violetalia calaminariae|
|At Gro Ystwyth, waste from past heavy metal mining has combined with natural river gravel to create the foundations of an extensive area of shingle heath on the flood plain of the River Ystwyth below Grogwynion. As the river reworks the gravel in a series of braided channels fresh material is deposited, and a range of seral stages in the development of heath and scrub are found at this site. Lichens are locally dominant in the heath, with a number of uncommon species present including Cladonia fragilissima and C. uncialis ssp. uncialis. Normally montane species, such as Stereocaulon condensatum and Epilichen scabrosus, occur here at an unusually low altitude. Metallophyte lichens of open ground are well-represented, with nationally scarce species, such as Vezdaea acicularis, Gyalidea subscutellaris and Thelocarpon impressellum, occurring amongst patches of sea campion Silene uniflora.|
Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site
|4030 European dry heaths|
Annex II species that are a primary reason for selection of this site
Annex II species present as a qualifying feature, but not a primary reason for site selection
Many designated sites are on private land: the listing of a site in these pages does not imply any right of public access.