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
|91E0 Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae) * Priority feature|
|Llwyn is one of the largest examples of alluvial forest in Wales. The woodland has formed on level ground on the floodplain of the River Clywedog, and has a canopy of alder Alnus glutinosa, with transitions to ash Fraxinus excelsior dominance on relatively drier ground. The structure is mature, with massive trees, abundant dead wood, and a rich understorey including abundant bird cherry Prunus padus and guelder rose Viburnum opulus, and occasional buckthorn Rhamnus cathartica and alder buckthorn Frangula alnus. The ground flora is diverse, including both wet woodland species, such as yellow iris Iris pseudacorus and remote sedge Carex remota, and those characteristic of drier ash-maple woodlands, such as ground-ivy Glechoma hederacea and moschatel Adoxa moschatellina. Although one of the largest examples of this woodland type in Wales, the total area is only modest, and the site is constrained by agricultural land and lack of natural dynamic disturbance.|
Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site
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.