S371 Corylus thickets

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Description

Hazel thickets in low- and midlands whose climate or topography prevent summer drought, occupying transitory or stable forest clearings, especially in abrupt slopes with frequent landslides.

Protection

This habitat is not protected under the EU Habitat Directive.

Floristic Composition

Frequent species

Corylus avellana 100%, Hedera helix aggr. 73%, Polystichum setiferum 59%, Lonicera periclymenum 55%, Crataegus monogyna 49%, Stellaria holostea 49%, Primula acaulis 47%, Mercurialis perennis 47%, Geranium robertianum 44%, Viola riviniana aggr. 43%, Dioscorea communis 41%, Euphorbia dulcis 40%, Oxalis acetosella 39%, Crepis lampsanoides 39%, Melica uniflora 38%, Saxifraga spathularis 34%, Athyrium filix-femina 33%, Luzula sylvatica 33%, Dryopteris filix-mas 33%, Ilex aquifolium 32%, Poa nemoralis 31%, Dryopteris affinis 30%, Omphalodes nitida 29%, Acer pseudoplatanus 29%, Teucrium scorodonia 28%, Salix atrocinerea 28%, Fraxinus excelsior 28%, Pteridium aquilinum 27%, Sanicula europaea 27%, Blechnum spicant 27%, Daphne laureola 27%, Brachypodium sylvaticum 26%, Heracleum sphondylium 24%, Sorbus aucuparia 24%, Euphorbia amygdaloides 23%, Holcus mollis 23%, Dryopteris dilatata 23%, Hypericum androsaemum 23%, Lilium martagon 22%, Polypodium vulgare 22%, Helleborus foetidus 22%, Anemone nemorosa 22%, Polygonatum verticillatum 22%, Hyacinthoides non-scripta 21%, Quercus robur 19%, Urtica dioica 19%, Milium effusum 19%, Ranunculus tuberosus aggr. 19%, Ruscus aculeatus 19%, Rubus ulmifolius 18%, Asplenium scolopendrium 18%, Erica arborea 17%, Smilax aspera 17%, Vaccinium myrtillus 17%, Brachypodium pinnatum 17%, Silene dioica 16%, Betula celtiberica 16%, Ajuga reptans 16%, Clematis vitalba 15%, Vicia sepium 14%, Carex sylvatica 14%, Fragaria vesca 14%, Galium odoratum 13%, Geum urbanum 13%, Galium aparine aggr. 13%, Aquilegia vulgaris aggr. 13%, Rubia peregrina 13%, Melittis melissophyllum 13%, Rosa canina aggr. 13%, Allium ursinum 13%, Chaerophyllum hirsutum 13%, Lamium maculatum 12%, Euphorbia hyberna 12%, Arum italicum 12%, Potentilla sterilis 12%, Frangula alnus 12%, Cardamine pratensis 12%, Castanea sativa 11%, Angelica sylvestris 11%, Asplenium adiantum-nigrum aggr. 11%, Lapsana communis 11%, Sambucus nigra 11%, Fagus sylvatica 10%, Prunus spinosa 10%, Helleborus viridis 10%, Cornus sanguinea 10%, Chrysosplenium oppositifolium 9%, Carex remota 9%, Polygonatum odoratum 9%, Adenostyles alpina 9%, Lactuca muralis 9%, Rumex acetosa 9%, Valeriana pyrenaica 9%, Digitalis purpurea 8%, Saxifraga hirsuta 8%, Ranunculus repens 8%, Hepatica nobilis 8%, Melampyrum pratense 8%, Moehringia trinervia 8%, Woodwardia radicans 8%, Circaea lutetiana 8%, Viola palustris 8%, Bromus ramosus 8%, Epilobium parviflorum 8%, Valeriana montana aggr. 7%, Fraxinus angustifolia 7%, Avenella flexuosa 7%, Pimpinella major 7%, Rumex acetosella 7%, Quercus petraea 7%, Carex pendula 7%, Veronica chamaedrys 7%, Quercus pyrenaica 7%, Taxus baccata 7%, Prunus avium 7%, Dryopteris aemula 7%, Iris foetidissima 7%, Asplenium trichomanes 6%, Glandora diffusa 6%, Cystopteris fragilis aggr. 6%, Primula veris 6%, Paris quadrifolia 6%, Luzula forsteri 5%, Laserpitium eliasii 5%, Narcissus minor 5%, Viburnum lantana 5%, Osmunda regalis 5%, Laurus nobilis 5%, Schedonorus giganteus 5%, Populus nigra 5%, Dactylis glomerata 5%, Solidago virgaurea 5%

Phytosociology

  • Hyperico androsaemi-Coryletum avellanae
  • Laserpitio eliasii-Coryletum avellanae
  • Linario triornithophorae-Coryletum avellanae
  • Omphalodo nitidae-Coryletum avellanae
  • Saxifrago hirsutae-Coryletum avellanae
  • Smilaco asperae-Coryletum avellanae

Relations with other habitat types

This tall scrub is interpretable either as a transitional immature stage (sometimes coopted as hedges and consciously promoted as a source of fruit and wooden shafts) of almost any type of deciduous forest (mainly T1E1) or, more stably, as permanent communities associated to steep rocky or scree biotopes where the diffuse, basal-shooting growth strategy of hazel, lacking a dominant trunk, becomes advantageous in the face of frequent mechanical disturbances.

Regional distribution

Known occurrences and potential area of occupancy of the habitat type in the study region.

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Citation: IBEROATLANTICA – Flora and Habitats of the Cantabrian Mixed Forests ecoregion.
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