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
    
  • 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
      
    • MH93 : Baltic vertically stratified water column with 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
        
        • MH9491 : Black Sea anoxic water column in water 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
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
    • R41 : Snow-bed vegetation
      
      • R411 : Boreo-alpine acidocline snow-patch grassland and herb habitats
        
      • R412 : Boreo-alpine calcicline snow-patch grassland and herb habitats
        
      • R413 : Ponto-Caucasian snow-patch grassland
        
      • R414 : Boreo-alpine fern snowbed grassland
        
    • R42 : Boreal and arctic acidophilous alpine grassland
      
    • R43 : Temperate acidophilous alpine grassland
      
    • R44 : Arctic-alpine calcareous grassland
      
      • R441 : Closed calciphile arctic-alpine grassland
        
      • R442 : Arctic-alpine wind edge Kobresia myosuroides swards
        
      • R443 : Arctic-alpine calciphilous stepped and garland grassland
        
      • R444 : Ponto-Caucasian alpine grassland
        
    • R45 : Alpine and subalpine calcareous grassland of the Balkans and Apennines
      
  • 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
  
  • 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
    
    • V51 : Shrub plantations for whole-plant harvesting
      
    • V52 : Shrub plantations for leaf or branch harvest
      
    • V53 : Shrub plantations for ornamental purposes or for fruit, other than vineyards
      
    • V54 : Vineyards
      
  • V6 : Tree dominated man-made habitats