| 词条 | Gweunydd Glan-y-glasnant |
| 释义 |
|name=Gweunydd Glan-y-glasnant |image= |image_caption= |aos=Carmarthenshire |displaymap=Wales Carmarthenshire |interest= |gridref={{gbmappingsmall|SN555116}} |coordinates = {{coord|51.784068|-4.095592|type:landmark_region:GB|display=inline,title}} |area={{convert|12.5|ha|sigfig=2}} |notifydate=1993 |enref= }}Gweunydd Glan-y-glasnant is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales, designated in 1993 for its botanical features.[1][2] SSSIGweunydd Glan-y-glasnant SSSI is a set of unimproved cattle-grazed pasture and hay meadows, extending to {{convert|12.5|ha}}, on varying thicknesses of glacial till overlaying coal measures and shaley sandstone. It is situated at {{convert|175|m}} above sea level in the upper valley of the Nant Glas, a tributary of the River Gwili, {{convert|0.8|mi}} south-west of Cross Hands and {{convert|0.6|mi}} east of Tumble.[1][2] The site is designated as an SSSI for its species-rich neutral grassland, rare now in Great Britain with 97% of such land lost through agricultural improvements since 1930. Such fields provide habitat for up to 30 distinct species of plant per square metre, in contrast with the 1 or 2 species per square metre on improved grassland fields. The site varies from pH neutral mesotrophic soil to damper acidic grassland.[2][3] Species common on the neutral grasslands include common bent (Agrostis capillaris), sweet vernal-grass (Anthoxanthum odoratum), clovers (Trifolium), common knapweed (Centaurea nigra) and bird's-foot-trefoil (Lotus corniculatus). There are smaller communities of tormentil (Potentilla erecta), meadow vetchling (Lathyrus pratensis), yarrow (Achillea millefolium), self-heal (Prunella vulgaris), as well as common spotted-orchid (Dactylorhiza fuchsii) and the adder's-tongue fern (Ophioglossum vulgatum). A distinct part of the site is a fen-meadow hosting purple moor-grass (Molinia caerulea) and meadow thistle (Cirsium dissectum).[2] A range of other habitats on the site, including acid grassland, scrub, semi-natural broadleaved woodland, hedgerows, individual trees, earthbank field boundaries, streams, ditches and rock outcrops support a broad range of fauna.[3] See also
References1. ^1 {{cite web| url=http://magic.defra.gov.uk/MagicMap.aspx?chosenLayers=sssiwalPIndex,sssiwalIndex,backdropDIndex,backdropIndex,europeIndex,vmlBWIndex,25kBWIndex,50kBWIndex,250kBWIndex,miniscaleBWIndex,baseIndex&box=253252:210699:257012:212749&useDefaultbackgroundMapping=false|title=MAGIC Map Application - Gweunydd Glan-y-glasnant|website=DEFRA MAGIC Map|publisher=DEFRA}} 2. ^1 2 3 {{cite web|title=Site of Special Scientific Interest, Carmarthenshire, Gweunydd Glan-y-glasnant|url=https://naturalresources.wales/media/636999/SSSI_0170_Map001d74f.pdf|publisher=Natural Resources Wales}} 3. ^1 {{cite web|title=Your Special Site and its Future - Gweunydd Glan-y-glasnant|url=https://naturalresources.wales/media/637019/SSSI_0170_SMS_EN0014fa0.pdf|publisher=Natural Resources Wales}} External links
2 : Sites of Special Scientific Interest in Carmarthen & Dinefwr|Meadows in Wales |
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