COUNTRYSIDE COUNCIL FOR WALES
SITE OF SPECIAL SCIENTIFIC INTEREST: CITATION
ANGLESEY VALLEY LAKES
National Grid Reference: SH 310770
Site Area: 98 ha
This site is selected for its biological interest.
Llynnau y Fali consists of a mosaic of open water areas with associated mesotrophic marshland and damp grassland habitats. There are two lakes, Llyn Penrhyn and Llyn Dinam, together with a number of smaller bodies of standing water. The aquatic macrophyte communities are largely composed of species associated with mesotrophic conditions, e.g. various-leaved pondweed Potamogeton gramineus and ivy-leaved duckweed Lemna trisulca, although there are species characteristic of base-rich water present particularly in Llyn Penrhyn, e.g. horned pondweed Zannichellia palustris among the less common aquatic plants are eight-stamened waterwort Elatine hydropiper and floating water-plantain Luronium natans. Various reedswamp and mire communities are also present together with stands of willow carr uncommon species, such as marsh fern Thelypteris thelypteroides and cyperus sedge Carex pseudocyperus, also occur in these areas.
The Valley lakes are also of interest ornithologically. For overwintering wildfowl they are especially important for shoveler; other species include teal, tufted duck, pochard and goldeneye. The vegetation more over also provides breeding habitat for a variety of wetland birds.