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
    
    • A3.1 : Atlantic and Mediterranean high energy infralittoral rock
    • A3.2 : Atlantic and Mediterranean moderate energy infralittoral rock
      • A3.21 : Kelp and red seaweeds (moderate energy infralittoral rock)
      • A3.22 : Kelp and seaweed communities in tide-swept sheltered conditions
        •  A3.221 : [Laminaria digitata], ascidians and bryozoans on tide-swept sublittoral fringe rock
        •  A3.222 : Mixed kelp with foliose red seaweeds, sponges and ascidians on sheltered tide-swept infralittoral rock
        •  A3.223 : Mixed kelp and red seaweeds on infralittoral boulders, cobbles and gravel in tidal rapids
        •  A3.224 : [Laminaria saccharina] with foliose red seaweeds and ascidians on sheltered tide-swept infralittoral rock
        •  A3.225 : Filamentous red seaweeds, sponges and [Balanus crenatus] on tide-swept variable-salinity infralittoral rock
        •  A3.226 : [Halopteris filicina] with coralline crusts on moderately exposed infralittoral rock
      • A3.23 : Mediterranean and Pontic communities of infralittoral algae moderately exposed to wave action
      • A3.24 : Faunal communities on moderate energy infralittoral rock
        •  A3.241 : Pontic [Mytilus galloprovincialis] beds on infralittoral rock
        •  A3.242 : Pontic sponge crusts on lower infralittoral rock
        •  A3.243 : Pontic colonial ascidian and bryozoan crusts on bare infralittoral rock
        •  A3.244 : Pontic soft rock beds with [Pholas dactylus] burrows
        •  A3.245 : Pontic [Teredo navalis] burrows in large wooden debris
        •  A3.246 : Pontic [Polydora] tubes on infralittoral soft rock
        •  A3.247 : Shallow smaller [Ostrea edulis] reefs adhering to rocky reefs and vertical drop-offs
    • A3.3 : Atlantic and Mediterranean low energy infralittoral rock
    •  A3.4 : Baltic exposed infralittoral rock
    •  A3.5 : Baltic moderately exposed infralittoral rock
    •  A3.6 : Baltic sheltered infralittoral rock
    • A3.7 : Features of infralittoral rock
  • 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
    • A6.3 : 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
  • A7 : Pelagic water column
    
  • A8 : Ice-associated marine habitats
    
• B : Coastal habitats
  
  • B1 : Coastal dunes and sandy shores
    
  • B2 : Coastal shingle
    
    • B2.1 : Shingle beach driftlines
    •  B2.2 : Unvegetated mobile shingle beaches above the driftline
    • B2.3 : Upper shingle beaches with open vegetation
    • B2.4 : Fixed shingle beaches, with herbaceous vegetation
    • B2.5 : Shingle and gravel beaches with scrub
    •  B2.6 : Shingle and gravel beach woodland
  • B3 : Rock cliffs, ledges and shores, including the supralittoral
    
• C : Inland surface waters
  
• D : Mires, bogs and fens
  
  • D1 : Raised and blanket bogs
    
  • D2 : Valley mires, poor fens and transition mires
    
  • D3 : Aapa, palsa and polygon mires
    
  • D4 : Base-rich fens and calcareous spring mires
    
  • D5 : Sedge and reedbeds, normally without free-standing water
    
  • D6 : Inland saline and brackish marshes and reedbeds
    
• E : Grasslands and lands dominated by forbs, mosses or lichens
  
  • E1 : Dry grasslands
    
  • E2 : Mesic grasslands
    
  • E3 : Seasonally wet and wet grasslands
    
    • E3.1 : Mediterranean tall humid grassland
    •  E3.2 : Mediterranean short humid grassland
    • E3.3 : Sub-mediterranean humid meadows
    • E3.4 : Moist or wet eutrophic and mesotrophic grassland
    • E3.5 : Moist or wet oligotrophic grassland
  • 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
  • F4 : Temperate shrub heathland
    
    • F4.1 : Wet heaths
    • F4.2 : Dry heaths
    • F4.3 : Macaronesian heaths
  • 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
    
  • FB : Shrub plantations
    
• G : Woodland, forest and other wooded land
  
• H : Inland unvegetated or sparsely vegetated habitats
  
• I : Regularly or recently cultivated agricultural, horticultural and domestic habitats
  
  • I1 : Arable land and market gardens
    
  • I2 : Cultivated areas of gardens and parks
    
• J : Constructed, industrial and other artificial habitats
  
  • J1 : Buildings of cities, towns and villages
    
  • J2 : Low density buildings
    
  • J3 : Extractive industrial sites
    
  • J4 : Transport networks and other constructed hard-surfaced areas
    
  • J5 : Highly artificial man-made waters and associated structures
    
  • J6 : Waste deposits
    
• X : Habitat complexes