Allt Y Gaer

Allt y Gaer is a Site of Special Scientific Interest in Llangathen community, Carmarthenshire, Wales. It is a 3. 5ha conifer woodland on the northern slopes of the Tywi Valley, which has SSSI protected designation because it holds the largest heronry in West Wales. HeronryThe Heron population of the woods gradually expanded such that by 1980 there were routinely more than 40 pairs, representing some 7-10% of the heron population of West Wales. Before the growth in population at Allt y Gaer, there had been a large heronry a little way upstream at Allt y wern, and in the 19th century they are thought to have used an area of Dinefwr Park National Nature Reserve still known as 'The Heronry'. Why Herons abandon one site and move to another remains unknown, but may be connected to disturbance during tree-felling operations. The SSSI designation aims to encourage as little disturbence as possible, especially during the February–June breeding season, whilst maintaining an abundance of nesting sites and food supplies. Conifer woodsThe woodland is a monocultural stand of mature conifers - especially larch. Although the dense shade and extensive litter layer of needles and branches have completely suppressed the pre-plantation flora, the mature stand of trees has allowed a significant growth of various species of fungi; in particular the wood provides a habitat for Spotted Toughshank (Rhodocollybia maculata), Plums and Custard (Tricholomopsis rutilans) and Clouded Agaric (Clitocybe nebularis).

Allt y Gaer is a Site of Special Scientific Interest in Llangathen community, Carmarthenshire, Wales. It is a 3. 5ha conifer woodland on the northern slopes of the Tywi Valley, which has SSSI protected designation because it holds the largest heronry in West Wales. HeronryThe Heron population of the woods gradually expanded such that by 1980 there were routinely more than 40 pairs, representing some 7-10% of the heron population of West Wales. Before the growth in population at Allt y Gaer, there had been a large heronry a little way upstream at Allt y wern, and in the 19th century they are thought to have used an area of Dinefwr Park National Nature Reserve still known as 'The Heronry'. Why Herons abandon one site and move to another remains unknown, but may be connected to disturbance during tree-felling operations. The SSSI designation aims to encourage as little disturbence as possible, especially during the February–June breeding season, whilst maintaining an abundance of nesting sites and food supplies. Conifer woodsThe woodland is a monocultural stand of mature conifers - especially larch. Although the dense shade and extensive litter layer of needles and branches have completely suppressed the pre-plantation flora, the mature stand of trees has allowed a significant growth of various species of fungi; in particular the wood provides a habitat for Spotted Toughshank (Rhodocollybia maculata), Plums and Custard (Tricholomopsis rutilans) and Clouded Agaric (Clitocybe nebularis).