Mediterranean siliceous scree

Description (English)

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.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code U24
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Indicator species

Diagnostic species
Constant species
Dominant species
Flowering Plants Viola crassiuscula
Flowering Plants Chaenorhinum glareosum
Ferns Cryptogramma crispa
Flowering Plants Festuca clementei
Flowering Plants Biscutella glacialis
Flowering Plants Euphorbia nevadensis
Flowering Plants Arenaria pungens
Flowering Plants Silene inaperta
Flowering Plants Reseda complicata
Flowering Plants Stachys corsica

Diagnostic species occur concentrated in the habitat in question, but are absent or rare in other habitats. They are good positive indicators of the habitat, but they do not need to occur in every location of the habitat.

Species scientific name English common name Species group
Viola crassiuscula Flowering Plants
Chaenorhinum glareosum Flowering Plants
Cryptogramma crispa Ferns
Festuca clementei Flowering Plants
Biscutella glacialis Flowering Plants
Euphorbia nevadensis Flowering Plants
Arenaria pungens Flowering Plants
Silene inaperta Flowering Plants
Reseda complicata Flowering Plants
Stachys corsica Flowering Plants
Flowering Plants Digitalis purpurea
Ferns Cryptogramma crispa
Flowering Plants Avenella flexuosa

Constant species occur frequently in the habitat, but they may include generalist species that are also frequent in other habitats.

Species scientific name English common name Species group
Digitalis purpurea Flowering Plants
Cryptogramma crispa Ferns
Avenella flexuosa Flowering Plants

Dominant species are those that often reach high cover in the habitat, thus determining the habitat physiognomy.

Species scientific name English common name Species group

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) H2.5 Acid siliceous screes of warm exposures narrower
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 H2.5 Acid siliceous screes of warm exposures same
EUNIS Habitat Classification 200308 H2.5 Acid siliceous screes of warm exposures same
EUNIS Habitat Classification 200202 H2.5 Acid siliceous screes of warm exposures same
EUNIS Habitat Classification 199910 H2.5 Acid siliceous screes of warm exposures same
EUNIS Habitat Classification 199811 H2.5 Acid siliceous screes of warm exposures same
EUNIS Habitat Classification 199712 H2.5 Siliceous screes of warm exposures same
Palaearctic Habitat Classification 199905 61.3 Part of Western Mediterranean and thermophilous screes wider
Palaearctic Habitat Classification 1997 61.3 Part of Western Mediterranean and thermophilous screes wider
Palaearctic Habitat Classification 1996 61.3   wider
Palaearctic Habitat Classification 1993 61.3   wider
CORINE Biotopes Classification 1991 61.3   wider
CORINE Biotopes Classification 1989 61.3   wider
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