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
  
  • MJ1 : Sea ice
    
    • MJ11 : Arctic sea ice
      
    • MJ12 : Baltic sea ice
      
  • MJ2 : Freshwater ice
    
  • MJ3 : Brine channels
    
    • MJ31 : Arctic brine channels
      
      • MJ311 : Arctic brine channels in first year ice
        
      • MJ312 : Brine channels in multi-year ice
        
    • MJ32 : Baltic brine channels
      
  • MJ4 : Under-ice habitat
    
    • MJ41 : Arctic under-ice habitat
      
    • MJ42 : Baltic under-ice habitat
      
• N : Coastal habitats
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
    • S21 : Subarctic and alpine dwarf Salix scrub
      
      • S211 : Boreo-alpine acidocline snow-patch Salix herbacea scrub
        
      • S212 : Boreo-alpine calcicline snow-patch Salix polaris scrub
        
      • S213 : Ponto-Caucasian snow-patch dwarf Salix scrub
        
    • S22 : Alpine and subalpine ericoid heath
      
    • S23 : Alpine and subalpine Juniperus scrub
      
    • S24 : Subalpine genistoid scrub of the Amphi-Adriatic region
      
    • S25 : Subalpine and subarctic deciduous scrub
      
    • S26 : Subalpine Pinus mugo scrub
      
    • S27 : Krummholz with conifers other than Pinus mugo
      
  • S3 : Temperate and mediterranean-montane scrub
    
  • S4 : Temperate shrub heathland
    
    • S41 : Wet heath
      
    • S42 : Dry heath
      
      • S421 : Submontane Vaccinium - Calluna heaths
        
      • S422 : Sub-Atlantic Calluna - Genista heaths
        
      • S423 : Atlantic Erica - Ulex heaths
        
      • S424 : Ibero-Atlantic Erica - Ulex - Cistus heaths
        
        • S4241 : Biscay heaths
          
        • S4242 : Luso-Galician heaths
          
        • S4243 : Cabreran heaths
          
        • S4244 : Galicio-Leonese heaths
          
          • S42441 : Galicio-Leonese Erica aragonensis heaths
            
          • S42442 : Galicio-Leonese Erica umbellata heaths
            
          • S42443 : Galicio-Leonese Erica cinerea heaths
            
        • S4245 : Oro-Castillan heaths
          
        • S4246 : Sorian heaths
          
        • S4247 : Cuencan heaths
          
        • S4248 : Luso-Extremaduran heaths
          
        • S4249 : Erica andevalensis heaths
          
      • S425 : Boreo-Atlantic Erica cinerea heaths
        
      • S426 : Inland dune heaths
        
    • S43 : Macaronesian heath
      
  • S5 : Maquis, arborescent matorral and thermo-Mediterranean scrub
    
  • S6 : Garrigue
    
  • S7 : Spiny Mediterranean heaths (phrygana, hedgehog-heaths and related coastal cliff vegetation)
    
  • 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
  
• V : Vegetated man-made habitats