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
      
    • MH95 : Mediterranean vertically stratified water column with full salinity
      
      • MH951 : Mediterranean water column with ephemeral thermal stratification and full salinity
        
      • MH952 : Mediterranean water column with seasonal thermal stratification and full salinity
        
      • MH953 : Mediterranean water column with permanent thermal stratification and full salinity
        
      • MH954 : Mediterranean water column with ephemeral halocline and full salinity
        
      • MH955 : Mediterranean water column with seasonal halocline and full salinity
        
      • MH956 : Mediterranean water column with permanent halocline and full salinity
        
      • MH957 : Mediterranean water column with ephemeral oxygen stratification and full salinity
        
      • MH958 : Mediterranean water column with seasonal oxygen stratification and full salinity
        
      • MH959 : Mediterranean water column with permanent oxygen stratification and full salinity
        
        • MH9591 : Mediterranean anoxic water column in water with permanent oxygen stratification and 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
  
• 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
    
    • V31 : Agriculturally-improved,
      
    • V32 : Mediterranean subnitrophilous annual grasslands
      
    • V33 : Dry mediterranean lands with unpalatable non-vernal herbaceous vegetation
      
    • V34 : Trampled xeric grasslands with annuals
      
    • V35 : Trampled mesophilous grasslands with annuals
      
    • V36 : Alpine and subalpine enriched grassland
      
    • V37 : Annual anthropogenic herbaceous vegetation
      
    • V38 : Dry perennial anthropogenic herbaceous vegetation
      
    • V39 : Mesic perennial anthropogenic herbaceous vegetation
      
  • V4 : Hedgerows
    
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats