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
  
  • MJ1 : Sea ice
    
  • MJ2 : Freshwater ice
    
    • MJ21 : Arctic freshwater ice
      
  • MJ3 : Brine channels
    
  • MJ4 : Under-ice habitat
    
• N : Coastal habitats
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
  • T1 : Deciduous broadleaved forest
    
  • T2 : Broadleaved evergreen forest
    
  • T3 : Coniferous forest
    
    • T31 : Temperate mountain Picea forest
      
    • T32 : Temperate mountain Abies forest
      
    • T33 : Mediterranean mountain Abies forest
      
    • T34 : Temperate subalpine Larix, Pinus cembra and Pinus uncinata forest
      
    • T35 : Temperate continental Pinus sylvestris forest
      
    • T36 : Temperate and submediterranean montane Pinus sylvestris-Pinus nigra forest
      
    • T37 : Mediterranean montane Pinus sylvestris-Pinus nigra forest
      
    • T38 : Mediterranean montane Cedrus forest
      
      • T381 : Cedrus libani forests
        
      • T382 : Cedrus brevifolia forests
        
    • T39 : Mediterranean and Balkan subalpine Pinus heldreichii-Pinus peuce forest
      
    • T3A : Mediterranean lowland to submontane Pinus forest
      
    • T3B : Pinus canariensis forest
      
    • T3C : Taxus baccata forest
      
    • T3D : Mediterranean Cupressaceae forest
      
    • T3E : Macaronesian Juniperus forest
      
      • T3E1 : Canary Island juniper forests
        
      • T3E2 : Azorean juniper forests
        
      • T3E3 : Macaronesian Phoenician juniper forests
        
    • T3F : Dark taiga
      
      • T3F1 : Vaccinium myrtillus western Picea taiga
        
        • T3F11 : Subcontinental bilberry western spruce taiga
          
        • T3F12 : Suboceanic bilberry western spruce taiga
          
        • T3F13 : Continental bilberry western spruce taiga
          
        • T3F14 : Boreo-nemoral bilberry western spruce taiga
          
      • T3F2 : Fern western Picea taiga
        
      • T3F3 : Small-herb western Picea taiga
        
      • T3F4 : Tall-herb western Picea taiga
        
        • T3F41 : Northern subcontinental tall-herb spruce taiga
          
        • T3F42 : Southern subcontinental tall-herb spruce taiga
          
        • T3F43 : Oceanic tall-herb birch-spruce taiga
          
        • T3F44 : Continental tall-herb western spruce taiga
          
      • T3F5 : Pretundra Picea obovata taiga
        
    • T3G : Pinus sylvestris light taiga
      
      • T3G1 : Calluna vulgaris - Empetrum western taiga
        
      • T3G2 : Vaccinium vitis-idaea Pinus and Picea - Pinus taiga
        
      • T3G3 : Herb-rich and grassy pine taiga
        
      • T3G4 : Lichen Pinus taiga
        
    • T3H : Larix light taiga
      
      • T3H1 : Larix russica taiga
        
    • T3J : Pinus and Larix mire forest
      
    • T3K : Picea mire forest
      
    • T3L : Coniferous self sown forest of non site-native trees
      
    • T3M : Coniferous plantation of non site-native trees
      
    • T3N : Coniferous plantation of site-native trees
      
  • T4 : Lines of trees, small anthropogenic forests, recently felled forest, early-stage forest and coppice
    
• 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
    
    • U61 : Subarctic volcanic field
      
    • U62 : Mediterranean, Macaronesian and temperate volcanic field
      
• V : Vegetated man-made habitats