R1-3 - Végétations dominées par des cryptogames et des annuelles sur les affleurements de roches calcaires et ultramafiques (EUNIS 2022)

R1-3 - Végétations dominées par des cryptogames et des annuelles sur les affleurements de roches calcaires et ultramafiques

Cryptogam- and annual-dominated vegetation on calcareous and ultramafic rock outcrops

R1-2 - Végétations dominées par des cryptogames et des annuelles sur les affleurements de roches siliceuses

R1-8 - Pelouses calcicoles rocailleuses vivaces d'Europe subatlantique-subméditerranéenne

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Open pioneer grassland with perennial succulents and spring annuals, subordinate small tussock grasses and herbs, and often with a very prominent and rich contingent of cryptogams. Typically found in small patches on very shallow and skeletal, impoverished, base-rich soils on a wide variety of base-rich and sometimes ultramafic bedrocks, and similar artificial habitats like quarry spoil and wall-tops. It is found from the hemiboreal to the submediterranean zone, occurring mainly at higher altitudes further south.

Espèces diagnostiques

Saxifraga tridactylites, Arenaria serpyllifolia, Clinopodium acinos, Draba verna aggr., Sedum acre, Sedum album, Alyssum alyssoides, Abietinella abietina, Homalothecium sericeum, Hornungia petraea, Poa compressa

Espèces constantes

Arenaria serpyllifolia, Sedum album, Sedum acre, Draba verna aggr., Clinopodium acinos, Poa bulbosa, Saxifraga tridactylites, Medicago minima, Sanguisorba minor aggr., Potentilla tabernaemontani, Poa compressa, Alyssum alyssoides, Syntrichia ruralis aggr., Euphorbia cyparissias, Cerastium semidecandrum, Cerastium pumilum, Veronica arvensis, Sedum sexangulare, Erodium cicutarium, Echium vulgare

Espèces dominantes

Sedum album

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)