Weathered rock and outcrop habitats
English name:
Weathered rock and outcrop habitats
Description (English)
Rocks and outcrops colonized by pioneer communities, especially of Crassulaceae. The substrates are mostly siliceous, occurring in the alpine or montane levels of higher mountains of the nemoral zone. The communities are dominated by succulent Sempervivum arachnoideum ssp. arachnoideum, Sempervivum arachnoideum ssp. tomentosum, Sempervivum montanum ssp. montanum, Sempervivum montanum ssp. stiriacum, Sempervivum wulfenii, Jovibarba arenaria, Sedum montanum, Sedum anglicum ssp. pyrenaicum, Sedum sexangulare, Sedum album, Sedum annuum, Saxifraga aspera, accompanied by Silene rupestris, Scleranthus polycarpos, Veronica fruticans, Thymus praecox ssp. polytrichus, Viola tricolor ssp. saxatilis, by small crucifers, lichens and mosses.
Source: EUNIS habitat classification
Quick facts
| EUNIS habitat type | code H3.6 |
|---|---|
| Relation to | Annex I habitat types (EU Habitats Directive) |
Legal status
Relation to other habitat types mentioned in legal instruments
| Legal text | Annex | Name in legal text | Code in legal text |
Habitat type relationship |
More information |
|---|---|---|---|---|---|
| Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007 | Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation | Siliceous rock with pioneer vegetation of the Sedo-Scleranthion or of the Sedo albi-Veronicion dillenii | 8230 | Overlap | http://ec.europa.eu/environm...rective/index_en.htm |
Vegetation types
Relation to vegetation types (syntaxa)
| Name | Definition | Other names | Reference |
|---|---|---|---|
| Sedo albi-Veronicion dillenii Korneck 1974 | Thermophilous therophyte- and geophyte-rich vegetation on stable siliceous rubble of Central Europe | Spergulo pentandrae-Veronicion dillenii de Foucault 1999; Spergulo pentandrae-Veronicion dillenii de Foucault 2001; Rumici-Veronicion dillenii Passarge 1977; Veronicion dillenii Oberd. 1957 | Schaminee et al, 2012 |
| Valerianion tuberosae Guinochet 1975 | Communities of calcareus shallow rubble soils in supramediterranean belt of Prealps of southern France | Schaminee et al, 2012 | |
| Hyperico perforati-Scleranthion perennis Moravec 1967 | Boreo-montane cilicicolous meso-xerophytic closed swards on shallow skeletal soils of Central Europe, British Isles and Fennoscandia | Thymo pulegioidis-Sedion sexangulare Didukh et Kontar 1998; Koelerio-Phleion phleoidis Korneck 1974; Poo compressae-Rumicion acetosellae Dudikh et Kontar 1998 | Schaminee et al, 2012 |
| Aethionemion saxatilis Bergmeier et al. 2009 | Thermophilous communities of calcareous and metalliferous rock outcrops of northern Hellas | Schaminee et al, 2012 | |
| Thero-Airion Tx. ex Oberd. 1957 | Pioneer vegetation on acidic shallow soils of winter-mild atlantic and sub-boreal regions of Europe and Madeira | Tuberario guttatae-Airion praecocis de Foucault 1999; Airion caryophylleo-praecocis Rivas-Mart. 1978; Thero-Airion Tx. 1951; Thero-Trifolion Doing 1974; Tuberario guttatae-Airion praecocis de Foucault 2001 | Schaminee et al, 2012 |
| Tortello tortuosae-Sedion albi Hallberg ex Dengler et Löbel 2006 | Xeric basiphilous grasslands of shallow soils of southern Baltic alvars | Festucion alvarense Albertson 1950; Tortello-Sedion Hallberg 1971; Helianthemo-Globularion Br.-Bl. 1963 nom. dubium p.p.; Helianthemo-Cetrarion (Br.-Bl. 1963) Krahulec et al. 1986; Anthyllido-Artemision campestris Sunding in Marker 1969 | Schaminee et al, 2012 |
| Alysso-Sedion Oberd. et T. Müller in T. Müller 1961 | Thermophilous stonecrop communities of weathered calcareous rocks | Allio sphaerocephali-Sedion albi (Oberd. et T. Müller in T. Müller 1961) de Foucault 1999; Alysso-Veronicion praecocis Passarge 1977; Sedo albi-Poion compressae (Oberd. et T. Müller in T. Müller 1961) de Foucault 1999; Sedo-Teucrion Doing 1963; Valerianello-Veronicion arvensis Passarge 1996; Gageo bohemicae-Sedion albi (Oberd. 1957) de Foucault 1999; Acino arvensis-Arenario serpyllifoliae de Foucault 1989; Sedo albi-Paronychion serpyllifoliae Tx. et Oberd. 1954 | Schaminee et al, 2012 |
| Sedo-Thymion De Molenaar 1976 | Open sub-thermophilous grassy swards and low scrub on skeletal shallow soils on siliceous substrates of Greenland | Schaminee et al, 2012 | |
| Sedion anglici Br.-Bl. in Br.-Bl. et Tx. 1952 | Pioneer vegetation on acidic shallow soils on rocky outcrops on siliceous rocks of atlantic region of Europe | Hyperico linarifolii-Sedion rupestris de Foucault 2001; Hyperico linarifolii-Sedion reflexi de Foucault in Julve 1993; Hyperico linarifolii-Sedion rupestris de Foucault 1999; Hyperico linarifolii-Sedion reflexi de Foucault 1999 | Schaminee et al, 2012 |
| Veronico-Poion glaucae Nordhagen 1943 | Open sub-thermophilous grasslands on sandy and skeletal shallow soils on siliceous substrates of Scandinavia | Veronico-Poion alpinae Sunding 1978; Veronico-Poion glaucae Nordhagen 1942 | Schaminee et al, 2012 |
| Sedo-Scleranthion Br.-Bl. 1950 | Pioneer vegetation on acidic shallow soils on rocky outcrops on siliceous rocks of Alpic valleys | Sedo-Scleranthion Br.-Bl. 1949; Sedo-Scleranthion Br.-Bl. 1955; Sempervivo-Sedion (Br.-Bl. 1955) T. Müller 1961; Rumici acetosellae-Scleranthion perennis de Foucault 1999; Rumici acetosellae-Scleranthion perennis de Foucault 2001 | Schaminee et al, 2012 |
| Scabioso-Trifolion dalmatici Horvatic et N. Randelovic in N. Randelovic 1977 | Silicicolous therophyte swards of submediterranean-continental Serbia | Scabioso-Trifolion dalmatici Horvatic et N. Randelovic 1973; Scabioso-Trifolion dalmatici N. Randelovic et Horvatic 1974; Scabioso-Trifolion dalmatici Horvatic et N. Randelovic in N. Randelovic 1975 | Schaminee et al, 2012 |
| Sedion micrantho-sediformis Rivas-Mart., P. Sánchez et Alcaraz ex P. Sánchez et Alcaraz 1993 | Communities of calcareous outcrops in mesomediterranean southwestern Iberia | Sedion micrantho-sediformis Rivas-Mart., P. Sánchez et Alcaraz in Alcaraz et al. 1991; Sedion micranthi (O. de Bolòs 1981) De la Torre et al. 1996 | Schaminee et al, 2012 |
| Sedion pyrenaici Tx. in Rivas-Mart. et al. 2011 | Pioneer vegetation on acidic shallow soils on rocky outcrops on siliceous rocks of Pyrenees and western Iberia | Sedion pyrenaici Tx. 1954; Sedion pyrenaici Tx. ex Rivas-Mart. et al. 1984; Sedion pyrenaici Tx. in Tx. et Oberd. 1958 | Schaminee et al, 2012 |
| Diantho pinifolii-Jasionion heldreichii Bergmeier et al. 2009 | Pioneer herb-rich vegetation on acidic shallow soils on rocky outcrops and stabilised ultramafic rubble of northern Hellas | Schaminee et al, 2012 |
Species mentioned in habitat description
Flowering Plants
Jovibarba arenaria
Flowering Plants
Saxifraga aspera
Flowering Plants
Scleranthus polycarpos
Flowering Plants
Sedum album
Flowering Plants
Sedum annuum
Flowering Plants
Sedum sexangulare
Flowering Plants
Sempervivum wulfenii
Flowering Plants
Silene rupestris
Flowering Plants
Veronica fruticans
| Species scientific name | English common name | Species group |
|---|---|---|
| Jovibarba arenaria | Flowering Plants | |
| Saxifraga aspera | Flowering Plants | |
| Scleranthus polycarpos | Flowering Plants | |
| Sedum album | Flowering Plants | |
| Sedum annuum | Flowering Plants | |
| Sedum sexangulare | Flowering Plants | |
| Sempervivum wulfenii | Flowering Plants | |
| Silene rupestris | Flowering Plants | |
| Veronica fruticans | Flowering Plants |
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| Palaearctic Habitat Classification 200112 | 36.2 | Alpine weathered rock and outcrop communities | overlap |
| CORINE Land Cover | 3.3.2. | Bare rock | n/a |
| CORINE Land Cover | 3.3.3. | Sparsely vegetated areas | n/a |
| Phase 1 habitat classification (UK) 1993 | I14 | Natural rock exposure: other exposure | wider |
| Phase 1 habitat classification (UK) 1993 | I142 | Natural rock exposure: other exposure, basic | overlap |
| Phase 1 habitat classification (UK) 1993 | I141 | Natural rock exposure: other exposure, acid/neutral | overlap |
History
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 200410 | H3.6 | Weathered rock and outcrop habitats | same |
| EUNIS Habitat Classification 200308 | H3.6 | Weathered rock and outcrop habitats | same |
| EUNIS Habitat Classification 200202 | H3.6 | Weathered rock and outcrop habitats | same |
| EUNIS Habitat Classification 199910 | H3.6 | Weathered rock and outcrop habitats | same |
| EUNIS Habitat Classification 199811 | H3.6 | Weathered rock and outcrop habitats | same |
| EUNIS Habitat Classification 199712 | H3.6 | Alpine weathered rock and outcrop communities | same |
| Palaearctic Habitat Classification 199905 | 36.2 | Alpine weathered rock and outcrop communities | same |
| Palaearctic Habitat Classification 1997 | 36.2 | Alpine weathered rock and outcrop communities | same |
| Palaearctic Habitat Classification 1996 | 36.2 | same | |
| Palaearctic Habitat Classification 1993 | 36.2 | same | |
| CORINE Biotopes Classification 1991 | 36.2 | same | |
| CORINE Biotopes Classification 1989 | 36.2 | same |
