U3-3 - Falaises continentales siliceuses planitiaires à montagnardes des zones tempérées

Temperate, lowland to montane siliceous inland cliff

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Siliceous rock walls and cliffs in the nemoral region except those in the high mountains and coastal cliffs subject to sea spray. They comprise diverse metamorphic, sedimentary and igneous rocks but also some non-calcareous but more or less base-rich igneous volcanics. The vegetation in the rock fissures and crevices consists of vascular plants such as small ferns, succulents and rosulate herbs, on the rock surface also mosses and hepatics, crustose and foliose lichens, micro-algae and other micro-organisms. Natural succession can lead to scrub and woodland development.

Espèces diagnostiques

Asplenium septentrionale, Asplenium obovatum, Hieracium umbellatum

Espèces constantes

Asplenium septentrionale, Campanula rotundifolia, Asplenium trichomanes, Hieracium umbellatum, Polypodium vulgare, Asplenium adiantum-nigrum, Rumex acetosella, Festuca ovina, Hylotelephium maximum, Cystopteris fragilis, Umbilicus rupestris

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)