EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
• MH : Pelagic water column
  
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
  • R5 : Forest fringes and clearings and tall forb stands
    
  • R6 : Inland salt steppes and salt marshes
    
  • R7 : Sparsely wooded grasslands
    
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
    • S11 : Shrub tundra
      
      • S111 : Western shrub tundra
        
    • S12 : Moss and lichen tundra
      
      • S121 : Cladonia - espalier willow tundra
        
      • S122 : Moss tundra
        
  • S2 : Arctic, alpine and subalpine scrub
    
  • S3 : Temperate and mediterranean-montane scrub
    
  • S4 : Temperate shrub heathland
    
  • S5 : Maquis, arborescent matorral and thermo-Mediterranean scrub
    
  • S6 : Garrigue
    
  • S7 : Spiny Mediterranean heaths (phrygana, hedgehog-heaths and related coastal cliff vegetation)
    
    • S71 : Western Mediterranean spiny heath
      
    • S72 : Eastern Mediterranean spiny heath (phrygana)
      
      • S721 : Aegean phrygana
        
        • S7211 : Aegean Sarcopoterium phrygana
          
        • S7212 : Maritime Centaurea spinosa phrygana
          
        • S7213 : Lesbian Centaurea spinosa phrygana
          
        • S7214 : Cycladian Centaurea phrygana
          
        • S7215 : Aegean Erica manipuliflora phrygana
          
        • S7216 : Aegean Thymus capitatus phrygana
          
        • S7217 : Aegean Genista acanthoclada phrygana
          
        • S7218 : Aegean Satureja thymbra phrygana
          
        • S7219 : Aegean Euphorbia acanthothamnos phrygana
          
        • S721A : Aegean Lithospermum hispidulum phrygana
          
        • S721B : Aegean Anthyllis hermanniae phrygana
          
      • S722 : Mid-elevation phrygana of Crete
        
      • S723 : Thracian phrygana
        
        • S7231 : Thracian Sarcopoterium phrygana
          
        • S7232 : Northern Thracian collinar Astragalus thracicus phrygana
          
      • S724 : East Mediterranean bathas
        
    • S73 : Western Mediterranean mountain hedgehog-heath
      
    • S74 : Central Mediterranean mountain hedgehog-heath
      
    • S75 : Eastern Mediterranean mountain hedgehog-heath
      
    • S76 : Canarian mountain hedgehog-heath
      
  • S8 : Thermo-Atlantic xerophytic scrub
    
  • S9 : Riverine and fen scrubs
    
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • U2 : Screes
    
  • U3 : Inland cliffs, rock pavements and outcrops
    
  • U4 : Snow or ice-dominated habitats
    
    • U41 : Snow pack
      
    • U42 : Ice cap and glacier
      
    • U43 : Rock glacier and unvegetated ice-dominated moraine
      
  • U5 : Miscellaneous inland habitats usually with very sparse or no vegetation
    
  • U6 : Recent volcanic features
    
• V : Vegetated man-made habitats