Allt Crug Garn between Pennant and Cilcennen, Ceredigion

Emperor moth

Vaughn Matthews

Allt Crug Garn between Pennant and Cilcennen, Ceredigion

Relic lowland heathland with oak and birch invasion.

Location

Lampeter.

OS Map Reference

Main entrance; SN517617, Site centre; SN518617.

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A static map of Allt Crug Garn between Pennant and Cilcennen, Ceredigion

Know before you go

Size
1 hectare
image/svg+xml

Access

Public transport: There are no buses to the reserve

Take B4337 from Llanrhystud, turn west on unsigned road at SN541625. First right after 4.5km and 400m takes you to Crug Garn farm gate. Access is opposite Crug Garn Farm entry, where there is space for one car and one opposite but take care on the soft verge. Follow the track to the left to the wire fence surrounding the reserve. No access for wheelchairs.

Dogs

image/svg+xmlOn a lead

When to visit

Opening times

Open access reserve.

Best time to visit

Summer

About the reserve

The southern third of the site contains the remains of an old plantation, while the northern two thirds is made up of tall old heathland growing on 80cm of peat.

Heather should show a cyclical succession where pioneer, building, senescent, and degenerating stages give way to one another over a 30-50 year period. Studies on this site, since 1976, indicates that there is very little heather regeneration, but instead a considerable successional pressure. Western Gorse has invaded the site followed by Birch, Rowan and Willow with a further threat from Beech.

The senescent Heather bushes show a classic sequence of lichens and bryophytes around their bases, including 7 species of Parmelia, 2 Ramalina, and Unsea florida, the latter indicating particularly clean air quality. Narrow buckler fern (Dryopteris carthusiana) is also present.

There is also an unusual fungi association to be found. False Truffle Elaphonomyces muricatus occur in the leaf litter amongst the Birch, together with their fungal parasite the Club fungus Cordiceps ophioglossoides, whose striking fruiting bodies show up amongst the carpet of green moss, Dicranum scoparium. Invertebrates include the Emperor moth.

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