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
      
  • 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
    
    • MH71 : Arctic fronts in reduced salinity water column
      
    • MH72 : Atlantic fronts in reduced salinity water column
      
      • MH721 : Atlantic ephemeral fronts in reduced salinity water column
        
      • MH722 : Atlantic seasonal fronts in reduced salinity water column
        
      • MH723 : Atlantic persistent fronts in reduced salinity water column
        
    • MH73 : Baltic fronts in reduced salinity water column
      
      • MH731 : Baltic ephemeral fronts in reduced salinity water column
        
      • MH732 : Baltic seasonal fronts in reduced salinity water column
        
      • MH733 : Baltic persistent fronts in reduced salinity water column
        
    • MH74 : Black Sea fronts in reduced salinity water column
      
      • MH741 : Black Sea ephemeral fronts in reduced salinity water column
        
      • MH742 : Black Sea seasonal fronts in reduced salinity water column
        
      • MH743 : Black Sea persistent fronts in reduced salinity water column
        
    • MH75 : Mediterranean fronts in reduced salinity water column
      
  • MH8 : Unstratified water column with full salinity
    
    • MH81 : Arctic unstratified water column with full salinity
      
    • MH82 : Atlantic unstratified water column with full salinity
      
      • MH821 : Atlantic euphotic (epipelagic) zone in unstratified full salinity water
        
      • MH822 : Atlantic mesopelagic zone in unstratified full salinity water
        
      • MH823 : Atlantic bathypelagic zone in unstratified full salinity water
        
      • MH824 : Atlantic abyssopelagic zone in unstratified full salinity water
        
    • MH83 : Baltic unstratified water column with full salinity
      
      • MH831 : Baltic euphotic (epipelagic) zone in unstratified full salinity water
        
      • MH832 : Baltic mesopelagic zone in unstratified full salinity water
        
      • MH833 : Baltic bathypelagic zone in unstratified full salinity water
        
    • MH84 : Black Sea unstratified water column with full salinity
      
    • MH85 : Mediterranean 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
    
  • 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