U2-4 - Éboulis siliceux méditerranéens

Mediterranean siliceous scree

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Siliceous screes derived from various sedimentary, igneous and metamorphic rocks occurring on lower slopes in the Mediterranean. Rock debris is often mixed with fine soil. Vegetation cover can be completely lacking or consisting only of bryophyte and lichen communities. In most cases, however, these screes support open vegetation of vascular plants, which tends to be poorer in species than Mediterranean calcareous screes. Natural succession is slower than in temperate screes. Screes overgrown with shrublands or forest do not belong to this habitat.

Espèces diagnostiques

Viola crassiuscula, Chaenorhinum glareosum, Cryptogramma crispa, Festuca clementei, Biscutella glacialis, Viola argenteria, Euphorbia nevadensis, Arenaria pungens, Silene inaperta, Reseda complicata, Stachys corsica

Espèces constantes

Digitalis purpurea, Cryptogramma crispa, Avenella flexuosa

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)