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
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
    • R31 : Mediterranean tall humid inland grassland
      
      • R311 : Mediterranean tall humid grassland of mountains
        
      • R312 : Mediterranean tall humid grassland of lowlands
        
    • R32 : Mediterranean short moist grassland of lowlands
      
    • R33 : Mediterranean short moist grassland of mountains
      
    • R34 : Submediterranean moist meadow
      
    • R35 : Moist or wet mesotrophic to eutrophic hay meadow
      
    • R36 : Moist or wet mesotrophic to eutrophic pasture
      
    • R37 : Temperate and boreal moist or wet oligotrophic grassland
      
      • R371 : Molinia caerulea meadows and related communities
        
      • R372 : Heath Juncus meadows and humid Nardus stricta swards
        
      • R373 : Continental oligotrophic humid grassland
        
  • 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
  
  • 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