EUNIS habitat type hierarchical view

• A : Marine habitats
  
  • A1 : Littoral rock and other hard substrata
    
  • A2 : Littoral sediment
    
  • A3 : Infralittoral rock and other hard substrata
    
  • A4 : Circalittoral rock and other hard substrata
    
  • A5 : Sublittoral sediment
    
  • A6 : Deep-sea bed
    
    • A6.1 : Deep-sea rock and artificial hard substrata
    • A6.2 : Deep-sea mixed substrata
      •  A6.21 : Deep-sea lag deposits
      •  A6.22 : Deep-sea biogenic gravels (shells, coral debris)
      •  A6.23 : Deep-sea calcareous pavements
      • A6.24 : Communities of allochthonous material
    • A6.3 : Deep-sea sand
    •  A6.4 : Deep-sea muddy sand
    • A6.5 : Deep-sea mud
    • A6.6 : Deep-sea bioherms
    • A6.7 : Raised features of the deep-sea bed
    • A6.8 : Deep-sea trenches and canyons, channels, slope failures and slumps on the continental slope
    • A6.9 : Vents, seeps, hypoxic and anoxic habitats of the deep sea
      • A6.91 : Deep-sea reducing habitats
      •  A6.92 : Deep-sea bed influenced by hypoxic water column
      •  A6.93 : Isolated ‘oceanic’ features influenced by hypoxic water column
      • A6.94 : Vents in the deep sea
      •  A6.95 : Pontic anoxic H2S black muds of the slope and abyssal plain, with anaerobic sulphate reducing bacteria and nematodes
  • A7 : Pelagic water column
    
  • A8 : Ice-associated marine habitats
    
• B : Coastal habitats
  
  • B1 : Coastal dunes and sandy shores
    
  • B2 : Coastal shingle
    
  • B3 : Rock cliffs, ledges and shores, including the supralittoral
    
• C : Inland surface waters
  
  • C1 : Surface standing waters
    
  • C2 : Surface running waters
    
    • C2.1 : Springs, spring brooks and geysers
    • C2.2 : Permanent non-tidal, fast, turbulent watercourses
      •  C2.21 : Epirhithral and metarhithral streams
      •  C2.22 : Hyporhithral streams
      •  C2.23 : Glacial meltwaters
      •  C2.24 : Waterfalls
      •  C2.25 : Acid oligotrophic vegetation of fast-flowing streams
      •  C2.26 : Lime-rich oligotrophic vegetation of fast-flowing streams
      •  C2.27 : Mesotrophic vegetation of fast-flowing streams
      •  C2.28 : Eutrophic vegetation of fast-flowing streams
    • C2.3 : Permanent non-tidal, smooth-flowing watercourses
    • C2.4 : Tidal rivers, upstream from the estuary
    •  C2.5 : Temporary running waters
    •  C2.6 : Films of water flowing over rocky watercourse margins
  • C3 : Littoral zone of inland surface waterbodies
    
• D : Mires, bogs and fens
  
• E : Grasslands and lands dominated by forbs, mosses or lichens
  
  • E1 : Dry grasslands
    
    • E1.1 : Inland sand and rock with open vegetation
    • E1.2 : Perennial calcareous grassland and basic steppes
    • E1.3 : Mediterranean xeric grassland
    • E1.4 : Mediterranean tall-grass and [Artemisia] steppes
      •  E1.41 : [Stipa tenacissima] steppes
      • E1.42 : [Lygeum spartum] steppes
      • E1.43 : Mediterranean steppes dominated by tall grasses other than [Stipa tenacissima] or [Lygeum spartum]
      •  E1.44 : Cane steppes
      •  E1.45 : Sub-Mediterranean [Artemisia] steppes
    • E1.5 : Mediterranean-montane grassland
    • E1.6 : Subnitrophilous annual grassland
    • E1.7 : Closed non-Mediterranean dry acid and neutral grassland
    • E1.8 : Closed Mediterranean dry acid and neutral grassland
    • E1.9 : Open non-Mediterranean dry acid and neutral grassland, including inland dune grassland
    • E1.A : Open Mediterranean dry acid and neutral grassland
    • E1.B : Heavy-metal grassland
    • E1.C : Dry mediterranean lands with unpalatable non-vernal herbaceous vegetation
    •  E1.D : Unmanaged xeric grassland
    •  E1.E : Trampled xeric grasslands with annuals
  • E2 : Mesic grasslands
    
    • E2.1 : Permanent mesotrophic pastures and aftermath-grazed meadows
    • E2.2 : Low and medium altitude hay meadows
    • E2.3 : Mountain hay meadows
    • E2.4 : Iberian summer pastures (vallicares)
    •  E2.5 : Meadows of the steppe zone
    • E2.6 : Agriculturally-improved, re-seeded and heavily fertilised grassland, including sports fields and grass lawns
    •  E2.7 : Unmanaged mesic grassland
    •  E2.8 : Trampled mesophilous grasslands with annuals
  • E3 : Seasonally wet and wet grasslands
    
  • E4 : Alpine and subalpine grasslands
    
  • E5 : Woodland fringes and clearings and tall forb stands
    
  • E6 : Inland salt steppes
    
  • E7 : Sparsely wooded grasslands
    
• F : Heathland, scrub and tundra
  
  • F1 : Tundra
    
  • F2 : Arctic, alpine and subalpine scrub
    
  • F3 : Temperate and mediterranean-montane scrub
    
    • F3.1 : Temperate thickets and scrub
    • F3.2 : Submediterranean deciduous thickets and brushes
      • F3.21 : Montane [Cytisus purgans] fields
      • F3.22 : Southwestern sub-mediterranean deciduous thickets
      •  F3.23 : Tyrrhenian sub-mediterranean deciduous thickets
      • F3.24 : Subcontinental and continental deciduous thickets
      • F3.25 : Piornales
      •  F3.26 : Tyrrhenian broom fields
      •  F3.27 : [Genista aetnensis] stands
      •  F3.28 : Canary Island broom fields
      •  F3.29 : Moesian broom fields
  • F4 : Temperate shrub heathland
    
  • F5 : Maquis, arborescent matorral and thermo-Mediterranean brushes
    
    • F5.1 : Arborescent matorral
    • F5.2 : Maquis
    • F5.3 : Pseudomaquis
    •  F5.4 : [Spartium junceum] fields
    • F5.5 : Thermo-Mediterranean scrub
  • F6 : Garrigue
    
  • F7 : Spiny Mediterranean heaths (phrygana, hedgehog-heaths and related coastal cliff vegetation)
    
  • F8 : Thermo-Atlantic xerophytic scrub
    
  • F9 : Riverine and fen scrubs
    
  • FA : Hedgerows
    
  • FB : Shrub plantations
    
• G : Woodland, forest and other wooded land
  
  • G1 : Broadleaved deciduous woodland
    
  • G2 : Broadleaved evergreen woodland
    
  • G3 : Coniferous woodland
    
  • G4 : Mixed deciduous and coniferous woodland
    
  • G5 : Lines of trees, small anthropogenic woodlands, recently felled woodland, early-stage woodland and coppice
    
• H : Inland unvegetated or sparsely vegetated habitats
  
  • H1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • H2 : Screes
    
  • H3 : Inland cliffs, rock pavements and outcrops
    
  • H4 : Snow or ice-dominated habitats
    
  • H5 : Miscellaneous inland habitats with very sparse or no vegetation
    
  • H6 : Recent volcanic features
    
• I : Regularly or recently cultivated agricultural, horticultural and domestic habitats
  
• J : Constructed, industrial and other artificial habitats
  
• X : Habitat complexes