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
  
  • MH1 : Neuston
    
    • MH11 : Arctic neuston
      
    • MH12 : Atlantic neuston
      
    • MH13 : Baltic neuston
      
    • MH14 : Black Sea neuston
      
    • MH15 : Mediterranean neuston
      
      • MH151 : Mediterranean temporary neuston layer
        
      • MH152 : Mediterranean permanent neuston layer
        
  • MH2 : Completely mixed water column with reduced salinity
    
  • MH3 : Completely mixed water column with full salinity
    
  • MH4 : Partially mixed water column with reduced salinity and medium or long residence time
    
  • MH5 : Unstratified water column with reduced salinity
    
  • MH6 : Vertically stratified water column with reduced salinity
    
  • MH7 : Fronts in reduced salinity water column
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
  • 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
        
        • S4221 : Northern Calluna - Genista heaths
          
        • S4222 : Subcontinental Calluna - Genista heaths
          
        • S4223 : Campino-Flandrian Calluna - Genista heaths
          
        • S4224 : Campino-Flandrian Erica cinerea heaths
          
        • S4225 : Britannic Calluna - Genista heaths
          
        • S4226 : Montane Calluna - Genista heaths
          
        • S4227 : Southern sub-boreal Calluna - Empetrum heaths
          
        • S4228 : Illyrian heaths
          
        • S4229 : Po basin heaths
          
        • S422A : Genista sagittalis heaths
          
        • S422B : Central European basicline heaths
          
        • S422C : Pontic ling heaths
          
      • S423 : Atlantic Erica - Ulex heaths
        
      • S424 : Ibero-Atlantic Erica - Ulex - Cistus heaths
        
      • S425 : Boreo-Atlantic Erica cinerea heaths
        
      • S426 : Inland dune heaths
        
    • S43 : Macaronesian heath
      
      • S431 : Canary Island heaths
        
      • S432 : Madeiran cloud heaths
        
      • S433 : Madeiran summital heaths
        
      • S434 : Azorean lowland heaths
        
      • S435 : Upland Azorean Erica azorica and Juniperus brevifolia heaths
        
      • S436 : Azorean summital heaths
        
  • 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
    
    • S91 : Temperate riparian scrub
      
    • S92 : Salix fen scrub
      
    • S93 : Mediterranean riparian scrub
      
    • S94 : Semi-desert riparian scrub
      
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats