EUNIS habitat type hierarchical view

• A : Marine habitats
  
  • A1 : Littoral rock and other hard substrata
    
  • A2 : Littoral sediment
    
    • A2.1 : Littoral coarse sediment
    • A2.2 : Littoral sand and muddy sand
    • A2.3 : Littoral mud
    • A2.4 : Littoral mixed sediments
    • A2.5 : Coastal saltmarshes and saline reedbeds
    • A2.6 : Littoral sediments dominated by aquatic angiosperms
    • A2.7 : Littoral biogenic reefs
    • A2.8 : Features of littoral sediment
      •  A2.81 : Methane seeps in littoral sediments
      • A2.82 : Ephemeral green or red seaweeds (freshwater or sand-influenced) on mobile substrata
      • A2.83 : Hydrolittoral stony substrata
      • A2.84 : Hydrolittoral gravel substrata
      • A2.85 : Hydrolittoral sandy substrata
      • A2.86 : Hydrolittoral muddy substrata
      • A2.87 : Hydrolittoral mixed sediment substrata
  • A3 : Infralittoral rock and other hard substrata
    
  • A4 : Circalittoral rock and other hard substrata
    
  • A5 : Sublittoral sediment
    
  • A6 : Deep-sea bed
    
  • A7 : Pelagic water column
    
    • A7.1 : Neuston
    • A7.2 : Completely mixed water column with reduced salinity
    • A7.3 : Completely mixed water column with full salinity
    • A7.4 : Partially mixed water column with reduced salinity and medium or long residence time
    • A7.5 : Unstratified water column with reduced salinity
    • A7.6 : Vertically stratified water column with reduced salinity
    • A7.7 : Fronts in reduced salinity water column
    • A7.8 : Unstratified water column with full salinity
    • A7.9 : Vertically stratified water column with full salinity
    • A7.A : Fronts in full salinity water column
  • A8 : Ice-associated marine habitats
    
    • A8.1 : Sea ice
    • A8.2 : Freshwater ice
    • A8.3 : Brine channels
    • A8.4 : Under-ice habitat
• B : Coastal habitats
  
• C : Inland surface waters
  
  • C1 : Surface standing waters
    
  • C2 : Surface running waters
    
  • C3 : Littoral zone of inland surface waterbodies
    
    • C3.1 : Species-rich helophyte beds
    • C3.2 : Water-fringing reedbeds and tall helophytes other than canes
    • C3.3 : Water-fringing beds of tall canes
    • C3.4 : Species-poor beds of low-growing water-fringing or amphibious vegetation
    • C3.5 : Periodically inundated shores with pioneer and ephemeral vegetation
    • C3.6 : Unvegetated or sparsely vegetated shores with soft or mobile sediments
    • C3.7 : Unvegetated or sparsely vegetated shores with non-mobile substrates
    •  C3.8 : Inland spray- and steam-dependent habitats
• D : Mires, bogs and fens
  
• E : Grasslands and lands dominated by forbs, mosses or lichens
  
• F : Heathland, scrub and tundra
  
  • F1 : Tundra
    
  • F2 : Arctic, alpine and subalpine scrub
    
  • F3 : Temperate and mediterranean-montane scrub
    
  • F4 : Temperate shrub heathland
    
  • F5 : Maquis, arborescent matorral and thermo-Mediterranean brushes
    
  • 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
    
    •  FA.1 : Hedgerows of non-native species
    •  FA.2 : Highly-managed hedgerows of native species
    •  FA.3 : Species-rich hedgerows of native species
    •  FA.4 : Species-poor hedgerows of native species
  • FB : Shrub plantations
    
• G : Woodland, forest and other wooded land
  
  • G1 : Broadleaved deciduous woodland
    
  • G2 : Broadleaved evergreen woodland
    
  • G3 : Coniferous woodland
    
    • G3.1 : [Abies] and [Picea] woodland
    • G3.2 : Alpine [Larix] - [Pinus cembra] woodland
    • G3.3 : [Pinus uncinata] woodland
    • G3.4 : [Pinus sylvestris] woodland south of the taiga
    • G3.5 : [Pinus nigra] woodland
    • G3.6 : Subalpine mediterranean [Pinus] woodland
    • G3.7 : Lowland to montane mediterranean [Pinus] woodland (excluding [Pinus nigra])
    • G3.8 : Canary Island [Pinus canariensis] woodland
    • G3.9 : Coniferous woodland dominated by [Cupressaceae] or [Taxaceae]
    • G3.A : [Picea] taiga woodland
    • G3.B : [Pinus] taiga woodland
    • G3.C : [Larix] taiga woodland
    • G3.D : Boreal bog conifer woodland
    • G3.E : Nemoral bog conifer woodland
    • G3.F : Highly artificial coniferous plantations
  • 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
    
    •  H2.1 : Cold siliceous screes
    •  H2.2 : Cold limestone screes
    • H2.3 : Temperate-montane acid siliceous screes
    • H2.4 : Temperate-montane calcareous and ultra-basic screes
    • H2.5 : Acid siliceous screes of warm exposures
      •  H2.51 : Pyreneo-Alpine thermo-siliceous screes
      •  H2.52 : Oro-Cantabrian siliceous screes
      •  H2.53 : Ibero-Pyrenean acidophile fern screes
      •  H2.54 : Carpetano-Iberian siliceous screes
      • H2.55 : Nevadan siliceous screes
      •  H2.56 : Central Mediterranean siliceous screes
      •  H2.57 : Anatolian siliceous screes
      •  H2.58 : Southeast European thermo-siliceous screes
    • H2.6 : Calcareous and ultra-basic screes of warm exposures
  • H3 : Inland cliffs, rock pavements and outcrops
    
  • H4 : Snow or ice-dominated habitats
    
  • H5 : Miscellaneous inland habitats with very sparse or no vegetation
    
    • H5.1 : Fjell fields and other freeze-thaw features with very sparse or no vegetation
    • H5.2 : Glacial moraines with very sparse or no vegetation
    • H5.3 : Sparsely- or un-vegetated habitats on mineral substrates not resulting from recent ice activity
    •  H5.4 : Dry organic substrates with very sparse or no vegetation
    • H5.5 : Burnt areas with very sparse or no vegetation
    • H5.6 : Trampled areas
  • H6 : Recent volcanic features
    
• I : Regularly or recently cultivated agricultural, horticultural and domestic habitats
  
• J : Constructed, industrial and other artificial habitats
  
  • J1 : Buildings of cities, towns and villages
    
  • J2 : Low density buildings
    
    •  J2.1 : Scattered residential buildings
    •  J2.2 : Rural public buildings
    • J2.3 : Rural industrial and commercial sites still in active use
    • J2.4 : Agricultural constructions
    • J2.5 : Constructed boundaries
      •  J2.51 : Fences
      •  J2.52 : Field walls
      •  J2.53 : Sea walls
    • J2.6 : Disused rural constructions
      •  J2.61 : Derelict spaces of disused rural constructions
    •  J2.7 : Rural construction and demolition sites
  • J3 : Extractive industrial sites
    
    •  J3.1 : Active underground mines
    •  J3.2 : Active opencast mineral extraction sites, including quarries
    •  J3.3 : Recently abandoned above-ground spaces of extractive industrial sites
  • J4 : Transport networks and other constructed hard-surfaced areas
    
  • J5 : Highly artificial man-made waters and associated structures
    
    • J5.1 : Highly artificial saline and brackish standing waters
    •  J5.2 : Highly artificial saline and brackish running waters
    • J5.3 : Highly artificial non-saline standing waters
    • J5.4 : Highly artificial non-saline running waters
    •  J5.5 : Highly artificial non-saline fountains and cascades
  • J6 : Waste deposits
    
• X : Habitat complexes