⌘K
Biotope - Typologie CORINE
34.8 - Niveau 3 : Pelouses méditerranéennes subnitrophiles
Description
Formations composed mostly of annuals, in particular, grasses of genera Bromus, Aegilops, Avena, Vulpia, crucifers and leguminous plants, that occupy considerable expanses of the western, central and eastern meso- and thermo-Mediterranean zones on soils slightly enriched in nitrates. These communities develop as pioneers of bare soils slightly nitrified by aeration or organic addition, along roads, on land-fills and in interstitial spaces of cultivation. They also replace the oligotrophic annual communities included in the Mediterranean xeric grasslands (34.51, 34.53) under the influence of pastoral activities. They are widespread as post-cultural formations. They evolve through intensive grazing into perennial pastures of the Poetalia bulbosae and related communities (34.52), through increased nitrification into ruderal formations (87), through an increase in edaphic humidity into amphibious communities (22.3) and perennial andropogonid steppes (34.634) or Phoenician torgrass swards (34.36). Ligneous recolonization may lead either to halo-nitrophilous scrubs of the Salsolo-Peganetalia (15.17), or to maquis and garrigues of the Rosmarinetalia, Lavanduletalia or Gypsophiletalia (32, 15.19).
Taxons (Liens actifs si espèces présentes)
34.81 - Niveau 4 : Groupements méditerranéens subnitrophiles de graminées
Description
Graminoid formations with Bromus fasciculatus, B. madritensis, B. intermedius, B. alopecuros, B. rubens, B. hordeaceus, B. tectorum, Aegilops neglecta, A. geniculata, A. triuncialis, A. ventricosa, Taeniatherum caput-medusae, Avena sterilis, A. barbata, Lagurus ovatus, Lolium rigidum, Vulpia ciliata, V. bromoides, V. geniculata, Lamarckia aurea, Trisetum paniceum, Cynosurus echinatus, Stipa capensis, and with Scandix australis, Astragalus scorpioides, Trifolium cherleri, T. hirtum, T. striatum, T. campestre, T. arvense, T. glomeratum, Viccia lutea, Medicago rigidula, M. sativa, M. littoralis, Melilotus sulcata, Coronilla scorpioides, Filago minima, Paronychia argentea, particularly widespread in Iberia, southern Italy and Greece where they may cover vast expanses of post-cultural or extensive pasture lands, also locally represented in southern France and coastal northern Italy.
Taxons (Liens actifs si espèces présentes)
Aegilops ovata subsp. ovata L., 1753 ( Comb. caract. )
Aegilops triuncialis L., 1753 [nom. et typ. cons.] ( Comb. caract. )
Bromus tectorum L., 1754 ( Comb. caract. )
Callitriche sp. ( Comb. caract. )
Crepis foetida L., 1753 ( Comb. caract. )
Echium plantagineum L., 1771 ( Comb. caract. )
Lolium rigidum Gaudin, 1811 ( Comb. caract. )
Medicago minima (L.) L., 1754 ( Comb. caract. )
Medicago rigidula (L.) All., 1785 ( Comb. caract. )
Nemertea sp. ( Comb. caract. )
Stipa capensis Thunb., 1794 ( Comb. caract. )
Taeniatherum caput-medusae (L.) Nevski, 1934 ( Comb. caract. )
Trifolium angustifolium L., 1753 ( Comb. caract. )
Trifolium cherleri L., 1755 ( Comb. caract. )
Trifolium striatum L., 1753 ( Comb. caract. )
Turbellaria sp. ( Comb. caract. )
Aegilops triuncialis L., 1753 [nom. et typ. cons.] ( Comb. caract. )
Bromus tectorum L., 1754 ( Comb. caract. )
Callitriche sp. ( Comb. caract. )
Crepis foetida L., 1753 ( Comb. caract. )
Echium plantagineum L., 1771 ( Comb. caract. )
Lolium rigidum Gaudin, 1811 ( Comb. caract. )
Medicago minima (L.) L., 1754 ( Comb. caract. )
Medicago rigidula (L.) All., 1785 ( Comb. caract. )
Nemertea sp. ( Comb. caract. )
Stipa capensis Thunb., 1794 ( Comb. caract. )
Taeniatherum caput-medusae (L.) Nevski, 1934 ( Comb. caract. )
Trifolium angustifolium L., 1753 ( Comb. caract. )
Trifolium cherleri L., 1755 ( Comb. caract. )
Trifolium striatum L., 1753 ( Comb. caract. )
Turbellaria sp. ( Comb. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)
Faible
Forte
— nb espèces indicatrices par classe
Humidité
Réaction du sol (pH)
Nutriments
Lumière
Matière organique
Granulométrie
Salinité