U2-3 - Éboulis siliceux planitiaires à montagnards des zones tempérées

Temperate, lowland to montane siliceous scree

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Siliceous screes and moraines of warm exposures, derived from a diversity of sedimentary, igneous and metamorphic rocks on the lower slopes of mountain ranges in the nemoral zone. Often the screes are mixed with fine soil. Vegetation can be completely lacking, but bryophyte or lichen-dominated, species-poor communities can occur on rock surfaces. The fine soil accumulated in crevices can support a variety of forb or fern-dominated vegetation. Siliceous screes, in general, have a lower species richness than calcareous screes but ferns can be diverse and luxuriant. Natural succession on more stable screes results in the development of scrub and woodland, not included here.

Espèces diagnostiques

Galeopsis segetum, Digitalis purpurea, Senecio viscosus, Linaria repens

Espèces constantes

Digitalis purpurea, Avenella flexuosa, Rumex acetosella, Galeopsis segetum, Senecio viscosus, Campanula rotundifolia, Linaria repens, Cytisus scoparius, Teucrium scorodonia, Pilosella officinarum, Agrostis capillaris, Galeopsis tetrahit aggr., Festuca ovina

Bibliographie

 European Topic Centre on Biological Diversity, 2021. EUNIS terrestrial habitat classification 2021 including crosswalks. ETC/BD-EEA. Table Excel transmise par S. Hennekens (Alterra) le 14/02/2022. (Source)