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
    
  • 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
    
    • MH41 : Arctic partially mixed water column with reduced salinity and medium or long residence time
      
    • MH42 : Atlantic partially mixed water column with reduced salinity and medium or long residence time
      
    • MH43 : Baltic partially mixed water column with reduced salinity and medium or long residence time
      
    • MH44 : Black Sea partially mixed water column with reduced salinity and medium or long residence time
      
    • MH45 : Mediterranean 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
    
    • MH91 : Arctic vertically stratified water column with full salinity
      
    • MH92 : Atlantic vertically stratified water column with full salinity
      
      • MH921 : Atlantic water column with ephemeral thermal stratification and full salinity
        
      • MH922 : Atlantic water column with seasonal thermal stratification and full salinity
        
      • MH923 : Atlantic water column with permanent thermal stratification and full salinity
        
      • MH924 : Atlantic water column with ephemeral halocline and full salinity
        
      • MH925 : Atlantic water column with seasonal halocline and full salinity
        
      • MH926 : Atlantic water column with permanent halocline and full salinity
        
      • MH927 : Atlantic water column with ephemeral oxygen stratification and full salinity
        
      • MH928 : Atlantic water column with seasonal oxygen stratification and full salinity
        
      • MH929 : Atlantic water column with permanent oxygen stratification and full salinity
        
    • MH93 : Baltic vertically stratified water column with full salinity
      
      • MH931 : Baltic water column with ephemeral thermal stratification and full salinity
        
      • MH932 : Baltic water column with seasonal thermal stratification and full salinity
        
      • MH933 : Baltic water column with permanent thermal stratification and full salinity
        
      • MH934 : Baltic water column with ephemeral halocline and full salinity
        
      • MH935 : Baltic water column with seasonal halocline and full salinity
        
      • MH936 : Baltic water column with permanent halocline and full salinity
        
      • MH937 : Baltic water column with ephemeral oxygen stratification and full salinity
        
      • MH938 : Baltic water column with seasonal oxygen stratification and full salinity
        
      • MH939 : Baltic water column with permanent oxygen stratification and full salinity
        
        • MH9391 : Baltic anoxic water column in water with permanent oxygen stratification and full salinity
          
    • MH94 : Black Sea vertically stratified water column with full salinity
      
      • MH941 : Black Sea water column with ephemeral thermal stratification and full salinity
        
      • MH942 : Black Sea water column with seasonal thermal stratification and full salinity
        
      • MH943 : Black Sea water column with permanent thermal stratification and full salinity
        
      • MH944 : Black Sea water column with ephemeral halocline and full salinity
        
      • MH945 : Black Sea water column with seasonal halocline and full salinity
        
      • MH946 : Black Sea water column with permanent halocline and full salinity
        
      • MH947 : Black Sea water column with ephemeral oxygen stratification and full salinity
        
      • MH948 : Black Sea water column with seasonal oxygen stratification and full salinity
        
      • MH949 : Black Sea water column with permanent oxygen stratification and full salinity
        
    • MH95 : Mediterranean vertically stratified water column with full salinity
      
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
  • N1 : Coastal dunes and sandy shores
    
    • N11 : Atlantic, Baltic and Arctic sand beach
      
    • N12 : Mediterranean and Black Sea sand beach
      
    • N13 : Atlantic and Baltic shifting coastal dune
      
      • N131 : Atlantic and Baltic embryonic dunes
        
      • N132 : Atlantic and Baltic large migrating dunes with no or low vegetation
        
      • N133 : Coastal dunes: white dunes (sensu strictu)
        
      • N134 : Coastal dunes: green dunes
        
      • N135 : Young boreo-arctic dunes
        
        • N1351 : Arctic dunes
          
        • N1352 : Icelandic foredunes
          
        • N1353 : Bothnian foredunes
          
    • N14 : Mediterranean, Macaronesian and Black Sea shifting coastal dune
      
    • N15 : Atlantic and Baltic coastal dune grassland (grey dune)
      
    • N16 : Mediterranean and Macaronesian coastal dune grassland (grey dune)
      
    • N17 : Black Sea coastal dune grassland (grey dune)
      
      • N171 : Pontic fixed dunes
        
    • N18 : Atlantic and Baltic coastal Empetrum heath
      
    • N19 : Atlantic coastal Calluna and Ulex heath
      
      • N191 : Calluna vulgaris brown dunes
        
    • N1A : Atlantic and Baltic coastal dune scrub
      
    • N1B : Mediterranean and Black Sea coastal dune scrub
      
    • N1C : Macaronesian coastal dune scrub
      
    • N1D : Atlantic and Baltic broad-leaved coastal dune forest
      
    • N1E : Black Sea broad-leaved coastal dune forest
      
    • N1F : Baltic coniferous coastal dune forest
      
    • N1G : Mediterranean coniferous coastal dune forest
      
    • N1H : Atlantic and Baltic moist and wet dune slack
      
      • N1H1 : Atlantic and Baltic dune-slack pools
        
      • N1H2 : Atlantic and Baltic dune-slack pioneer swards
        
      • N1H3 : Atlantic and Baltic dune-slack fens
        
      • N1H4 : Atlantic and Baltic dune-slack grassland and heaths
        
      • N1H5 : Atlantic and Baltic dune-slack reedbeds, sedgebeds and canebeds
        
      • N1H6 : Atlantic and Baltic coastal wet dune slacks dominated by shrubs or trees
        
    • N1J : Mediterranean and Black Sea moist and wet dune slack
      
  • N2 : Coastal shingle
    
  • N3 : Rock cliffs, ledges and shores, including the supralittoral
    
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• 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