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
    
  • R4 : Alpine and subalpine grasslands
    
    • R41 : Snow-bed vegetation
      
    • R42 : Boreal and arctic acidophilous alpine grassland
      
    • R43 : Temperate acidophilous alpine grassland
      
    • R44 : Arctic-alpine calcareous 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
    
    • R61 : Mediterranean inland salt steppe
      
      • R611 : Mediterranean Limonium salt steppes
        
      • R612 : Mediterranean Lygeum spartum salt steppes
        
      • R613 : Mediterranean inland halo-nitrophilous pioneer communities
        
    • R62 : Continental inland salt steppe
      
      • R621 : Pannonic salt steppes and saltmarshes
        
        • R6211 : Saline puszta
          
          • R62111 : Grassy saline puszta
            
          • R62112 : Grassy psammo-saline puszta
            
          • R62113 : Artemisia saline puszta
            
          • R62114 : East Pannonic Petrosimonia-Artemisia salt steppes
            
          • R62115 : Saline forest-edge meadow-steppe
            
          • R62116 : East Pannonic Limonium-Artemisia salt steppes
            
        • R6212 : Pannonic saline meadows
          
        • R6213 : Pannonic solonetz hollows
          
        • R6214 : Pannonic solonchak hollows
          
        • R6215 : Pelago-Vardarian salt steppes
          
      • R622 : Ponto-Sarmatic salt steppes and saltmarshes
        
      • R623 : Central Eurasian solonchak grassland with Crypsis
        
      • R624 : Central Balkan salt steppes and saltmarshes
        
    • R63 : Temperate inland salt marsh
      
    • R64 : Semi-desert salt pan
      
    • R65 : Continental subsaline alluvial pasture and meadow
      
  • R7 : Sparsely wooded grasslands
    
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
  • T1 : Deciduous broadleaved forest
    
  • T2 : Broadleaved evergreen forest
    
  • T3 : Coniferous forest
    
  • T4 : Lines of trees, small anthropogenic forests, recently felled forest, early-stage forest and coppice
    
    • T41 : Early-stage natural and semi-natural forest and regrowth
      
    • T42 : Coppice and early stage plantations
      
    • T43 : Recently felled areas
      
• 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