T1By Mountain Quercus forests on acid soils

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Description

These forests replace T182 when any combination of comparatively abrupt terrain, rocky soil, southerly aspect and relatively sunny and dry summers (as happens in the westernmost sector of the Cantabrian mountains, where these forests, especially under the form of scrubby formations dominated by Quercus orocantabrica, reach the treeline) increases the risk of beeches failing to support their high transpiration needs. If those comparatively dry conditions deepen, T19A comes to prevail. They correspond to the in our view far too analytically considered EUNIS unit T1B623 (“Oro-Cantabrian acidophilous oak forests), lumped by EUNIS with our T1Bx but actually more related to T1B3 (“Atlantic Quercus petraea forests), restricted by EUNIS to the British Isles. To resolve such issues, a new level IV regional unit is created.

Floristic Composition

Frequent species

Quercus petraea 0.83, Teucrium scorodonia 0.71, Vaccinium myrtillus 0.69, Pteridium aquilinum 0.65, Stellaria holostea 0.65, Erica arborea 0.61, Avenella flexuosa 0.59, Sorbus aucuparia 0.59, Ilex aquifolium 0.59, Lonicera periclymenum 0.49, Melampyrum pratense 0.48, Corylus avellana 0.48, Anemone nemorosa 0.44, Luzula sylvatica 0.39, Holcus mollis 0.38, Viola riviniana aggr. 0.38, Fagus sylvatica 0.33, Dryopteris filix-mas 0.32, Crepis lampsanoides 0.3, Polypodium vulgare 0.3, Betula celtiberica 0.3, Asphodelus albus 0.28, Anthoxanthum odoratum 0.26, Saxifraga spathularis 0.26, Hedera helix aggr. 0.26, Physospermum cornubiense 0.25, Genista florida 0.25, Dryopteris dilatata 0.22, Euphorbia amygdaloides 0.22, Crataegus monogyna 0.21, Euphorbia dulcis 0.2, Oxalis acetosella 0.2, Solidago virgaurea 0.2, Lathyrus linifolius 0.2, Poa nemoralis 0.19, Linaria triornithophora 0.19, Sorbus aria 0.18, Cytisus scoparius 0.17, Melica uniflora 0.17, Hypericum pulchrum 0.16, Arenaria montana 0.16, Galium saxatile 0.16, Digitalis purpurea 0.15, Polygonatum verticillatum 0.15, Euphorbia hyberna 0.14, Acer pseudoplatanus 0.14, Daboecia cantabrica 0.14, Omphalodes nitida 0.13, Melittis melissophyllum 0.13, Hieracium murorum aggr. 0.13, Polystichum setiferum 0.13, Frangula alnus 0.13, Blechnum spicant 0.13, Rubus ulmifolius 0.12, Ranunculus tuberosus aggr. 0.12, Fragaria vesca 0.12, Geranium robertianum 0.11, Castanea sativa 0.11, Conopodium majus aggr. 0.1, Quercus pyrenaica 0.1, Valeriana montana aggr. 0.1, Agrostis capillaris 0.1, Brachypodium pinnatum 0.1, Mercurialis perennis 0.1, Aquilegia vulgaris aggr. 0.1, Primula veris 0.09, Ceratocapnos claviculata 0.09, Quercus robur 0.09, Festuca rubra 0.09, Galium rotundifolium 0.09, Helictochloa marginata 0.09, Stachys officinalis 0.09, Daphne laureola 0.08, Ulex minor aggr. 0.08, Asplenium adiantum-nigrum aggr. 0.08, Pulmonaria longifolia 0.08, Rubus lainzii 0.08, Helleborus viridis 0.08, Lathyrus niger 0.08, Lilium martagon 0.08, Erica vagans 0.08, Prunus spinosa 0.08, Prunella grandiflora 0.08, Brachypodium sylvaticum 0.08, Glandora diffusa 0.08, Polygonatum odoratum 0.08, Fraxinus excelsior 0.07, Hepatica nobilis 0.07, Helictotrichon thorei 0.07, Sanicula europaea 0.07, Dactylis glomerata 0.07, Veronica officinalis 0.07, Rosa arvensis 0.07, Potentilla erecta 0.07, Primula acaulis 0.07, Luzula lactea 0.07, Cruciata glabra 0.07, Clinopodium vulgare 0.06, Agrostis curtisii 0.06, Dioscorea communis 0.06, Calluna vulgaris 0.06, Veronica chamaedrys 0.06, Doronicum carpetanum 0.06, Laserpitium latifolium 0.06, Rumex acetosa 0.06, Dryopteris affinis 0.06, Vicia sepium 0.06, Ruscus aculeatus 0.06, Acer campestre 0.05, Thelypteris limbosperma 0.05, Potentilla sterilis 0.05, Hieracium prenanthoides aggr. 0.05, Gentiana lutea 0.05, Galium odoratum 0.05, Rumex acetosella 0.05, Rosa canina aggr. 0.05, Hyacinthoides non-scripta 0.05

Phytosociology

  • Avenello ibericae-Quercetum orocantabricae
  • Linario triornithophorae-Quercetum petraeae
  • Luzulo henriquesii-Quercetum petraeae
  • Pulmonario longifoliae-Quercetum petraeae

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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