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
      
      • MH111 : Arctic temporary neuston layer
        
      • MH112 : Arctic permanent neuston layer
        
    • MH12 : Atlantic neuston
      
    • MH13 : Baltic neuston
      
    • MH14 : Black Sea neuston
      
      • MH141 : Black Sea temporary neuston layer
        
      • MH142 : Black Sea permanent neuston layer
        
    • MH15 : Mediterranean neuston
      
  • MH2 : Completely mixed water column with reduced salinity
    
  • MH3 : Completely mixed water column with full salinity
    
    • MH31 : Arctic completely mixed water column with full salinity
      
      • MH311 : Arctic completely mixed water column with full salinity and short residence time
        
      • MH312 : Arctic completely mixed water column with full salinity and medium residence time
        
      • MH313 : Arctic completely mixed water column with full salinity and long residence time
        
    • MH32 : Atlantic completely mixed water column with full salinity
      
    • MH33 : Baltic completely mixed water column with full salinity
      
    • MH34 : Black Sea completely mixed water column with full salinity
      
    • MH35 : Mediterranean 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
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
    • R21 : Mesic permanent pasture of lowlands and mountains
      
    • R22 : Low and medium altitude hay meadow
      
    • R23 : Mountain hay meadow
      
    • R24 : Iberian summer pasture (vallicar)
      
  • 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
    
    • R61 : Mediterranean inland salt steppe
      
    • R62 : Continental inland salt steppe
      
    • R63 : Temperate inland salt marsh
      
      • R631 : Interior European Puccinellia distans meadows
        
      • R632 : Interior European saltmarsh Juncus gerardi and Elymus repens beds
        
      • R633 : Interior European Halimione pedunculata beds
        
      • R634 : Interior Iberian Microcnemum and Salicornia swards
        
      • R635 : Interior central European and Anatolian Salicornia, Microcnemum, Suaeda and Salsola swards
        
        • R6351 : Pannonic glasswort-seablite-saltwort swards
          
          • R63511 : Pannonic glasswort swards
            
          • R63512 : Pannonic seablite swards
            
          • R63513 : Pannonic saltwort communities
            
          • R63514 : Pelagonian seablite swards
            
        • R6352 : Western Pontic glasswort-seablite-saltwort swards
          
        • R6353 : Central Eurasian glasswort swards
          
      • R636 : Western European continental glasswort beds
        
      • R637 : Interior European saltmarsh Carex divisa and Carex distans beds
        
    • R64 : Semi-desert salt pan
      
    • R65 : Continental subsaline alluvial pasture and meadow
      
  • R7 : Sparsely wooded grasslands
    
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
  • V3 : Artificial grasslands and herb dominated habitats
    
  • V4 : Hedgerows
    
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats