|Scientific name||Quercus robur – Luzula sylvatica woodland|
|Common name||Pedunculate Oak – Great Wood-rush woodland|
Download full pdf synopsis: WL1A
This is a high forest community dominated by either Quercus robur or Quercus × rosacea. Sorbus aucuparia is a constant here and Betula pubescens is frequent, while Ilex aquifolium usually forms the understorey frequently accompanied by Corylus avellana. The chief species in the field layer are Dryopteris dilatata, Hedera helix, Lonicera periclymenum, Rubus fruticosus agg. and Luzula sylvatica; extensive wood-rush swards or dense bramble thickets may be found. There are few forbs in this community with Oxalis acetosella and Hyacinthoides non-scripta the only ones frequent or occasional. The bryophyte layer largely consists of Isothecium myosuroides, Thuidium tamariscinum, Kindbergia praelonga, Hypnum cupressiforme, Eurhynchium striatum and Polytrichum formosum.
This is a woodland community of acidic and nutrient-poor podzols and well-drained mineral soils found on sloping ground in the lowlands or upland margins.
Two sub-communities are defined, the Quercus robur sub-community (WL1Ai) and the Quercus × rosacea sub-community (WL1Aii), which simply differentiate on canopy species.
From the Luzula-rich woodlands of WL1B, the present community is distinguished by the different oak species in the canopy. Stands of sub-community WL1Ai are similar to those of WL2A in that they are both dominated by Quercus robur, but those of WL2A are more base-rich, with Luzula usually absent and Fraxinus excelsior accompanying oak in the canopy.
This is on average a fairly species-poor woodland community with a fairly limited bryophyte flora. Many stands qualify as EU HD Annex I habitat 91A0 Old oak woodlands, particularly those with Luzula sylvatica or Vaccinium myrtillus in the field layer.
These woodlands are commonly grazed, particularly by deer, and overgrazing is an acknowledged problem. Locally, woods have been fenced and deer culling employed to try to promote woodland regeneration. Invasion by non-native species and woodland clearance are also threats. Rhododendron ponticum thrives in these moist, acidic conditions. Spraying with herbicide, cutting and removal of seedlings have been used to combat the spread of this species within these woods.