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
  
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
  • N1 : Coastal dunes and sandy shores
    
  • N2 : Coastal shingle
    
  • N3 : Rock cliffs, ledges and shores, including the supralittoral
    
• Q : Wetlands
  
  • Q1 : Raised and blanket bogs
    
  • Q2 : Valley mires, poor fens and transition mires
    
  • Q3 : Palsa mires
    
  • Q4 : Base-rich fens and calcareous spring mires
    
    • Q41 : Alkaline, calcareous, carbonate-rich small-sedge spring fen
      
      • Q411 : Schoenus ferrugineus fens
        
      • Q412 : Subcontinental Carex davalliana fens
        
        • Q4121 : Peri-Alpine Davall sedge fens
          
        • Q4122 : Deergrass Davall sedge fens
          
        • Q4123 : Bohemio-Pannonic Davall sedge fens
          
        • Q4124 : Carpathian Davall sedge fens
          
        • Q4125 : Northern Davall sedge fens
          
        • Q4126 : Dinaric carnation-tawny sedge fens
          
      • Q413 : Pyrenean Carex davalliana fens
        
      • Q414 : Eleocharis quinqueflora fens
        
      • Q415 : Middle European Blysmus compressus fens
        
      • Q416 : Hard water spring mires
        
    • Q42 : Extremely rich moss-sedge fen
      
      • Q421 : Carex dioica , Carex pulicaris and Carex flava fens
        
      • Q422 : Carex nigra alkaline fens
        
      • Q423 : Scirpus hudsonianus (Trichophorum alpinum) alkaline fens
        
      • Q424 : Trichophorum cespitosum alkaline fens
        
      • Q425 : Small herb alkaline fens
        
    • Q43 : Tall-sedge base-rich fen
      
    • Q44 : Calcareous quaking mire
      
    • Q45 : Arctic-alpine rich fen
      
    • Q46 : Carpathian travertine fen with halophytes
      
  • Q5 : Helophyte beds
    
  • Q6 : Periodically exposed shores
    
• 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
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • U2 : Screes
    
  • U3 : Inland cliffs, rock pavements and outcrops
    
  • U4 : Snow or ice-dominated habitats
    
  • U5 : Miscellaneous inland habitats usually with very sparse or no vegetation
    
  • U6 : Recent volcanic features
    
• V : Vegetated man-made habitats