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      Biosphere Reserve Information

United Kingdom


  General Description   Situated at the coast of south-central Wales in the estuary of the Dyfi River, this biosphere reserve is representative of salt marshes and estuarine systems in the west of the United Kingdom. The estuary forms one of the most important wildfowl and shorebird centers in Wales and also comprises a Ramsar site. Cors Fochno has a large expanse of primary raised mire and contains a high number of invertebrate species, including some of national and international importance. Upstream along the Dyfi Valley are remnants of native oak woodland.
The estuarine marshes and surrounding land have traditionally been used by farmers to graze horses, cattle and sheep, and recent efforts have been directed at maintaining the traditional Welsh Black breed. Grazing of the saltmarshes is encouraged to maintain suitable conditions for wintering wildfowl. Recently a small herd of Welsh mountain ponies has been introduced to assist rehabilitation of mire-wet grassland habitats. The heavy recreational use of the Ynyslas dunes has led to an intensive and long-standing visitor management scheme incorporating interpretive displays and programmes, wardening, boardwalks and vehicle controls.
There is a long history of research and monitoring in the area, including vegetation and hydrological analysis, ornithological and tourism impacts research, and invertebrate monitoring. The national nature reserve is visited by about 8,000 students every year.
Proposals made in the periodic review for extending this reserve to meet the Seville criteria are being considered.
  Major ecosystem type   Temperate broadleaf forests or woodlands including marshlands
  Major habitats & land cover types   Marshes, mudflats, dunes, sandbanks and raised bog
  Location   5232'N; 0400'W
  Area (hectares)    
  Total   1,589
  Core area(s)  
  Buffer zone(s)  
  Transition area(s) when given  
  Altitude (metres above sea level)   0 to +15
  Year designated   1976
  Administrative authorities   Countryside Council for Wales
  Brief description   Structure and function of raised bog and bar-built estuary
Effects of natural and human influences on raised mire ecosystem
Estuarine biology
Monitoring of key habitats, species and abiotic features/factors
  Specific variables...    
  Abiotic   Abiotic factors, habitat, monitoring/methodologies.
  Biodiversity   Biology, coastal/marine, ecosystem functioning/ecosystem structure, methodologies.
  Socio-economic   n.a.
  Integrated monitoring   Impact and risk studies/Environmental impact.
  Contact address   Michael Bailey
Site Manager, Dyfi National Nature Reserve
CCW, Plas Gogerddan, Aberystwyth
SY23 3EE Ceredigion
United Kingdom
  Telephone   (44.01970) 872900
  Fax   (44.01970) 828314
  Contact address   Ricahrds Delyth
Dyfi Biosphere Reserve Ty Bro Ddyfi
52 Heol Maengwyn
SY20 8DT Machynlleth
United Kingdom
  Telephone   (44.01970) 871640
  Fax   (44.01970) 828314

Last updated: 02/03/2007

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