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
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
  • T1 : Deciduous broadleaved forest
    
    • T11 : Temperate Salix and Populus riparian forest
      
    • T12 : Alnus glutinosa-Alnus incana forest on riparian and mineral soils
      
    • T13 : Temperate hardwood riparian forest
      
    • T14 : Mediterranean and Macaronesian riparian forest
      
    • T15 : Broadleaved swamp forest on non-acid peat
      
    • T16 : Broadleaved mire forest on acid peat
      
    • T17 : Fagus forest on non-acid soils
      
    • T18 : Fagus forest on acid soils
      
    • T19 : Temperate and submediterranean thermophilous deciduous forest
      
    • T1A : Mediterranean thermophilous deciduous forest
      
    • T1B : Acidophilous Quercus forest
      
      • T1B1 : Atlantic Quercus robur - Betula forests
        
      • T1B2 : Atlantic acidophilous Fagus - Quercus forests
        
      • T1B3 : Atlantic Quercus petraea forests
        
      • T1B4 : Aquitano-Ligerian Quercus forests on podsols
        
      • T1B5 : Aquitano-Ligerian Quercus forests on leached or acid soils
        
      • T1B6 : Ibero-Atlantic acidophilous Quercus forests
        
      • T1B7 : Medio-European acidophilous Quercus forests
        
      • T1B8 : Insubrian acidophilous Quercus forests
        
      • T1B9 : Portuguese Quercus robur forests
        
      • T1BA : Continental Quercus petraea forests
        
    • T1C : Temperate and boreal mountain Betula and Populus tremula forest on mineral soils
      
    • T1D : Southern European mountain Betula and Populus tremula forest on mineral soils
      
    • T1E : Carpinus and Quercus mesic deciduous forest
      
    • T1F : Ravine forest
      
    • T1G : Alnus cordata forest
      
    • T1H : Broadleaved deciduous plantation of non site-native trees
      
    • T1J : Deciduous self sown forest of non site-native trees
      
    • T1K : Broadleaved deciduous plantation of site-native trees
      
  • 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
      
      • T421 : Coppice
        
      • T422 : Early-stage broadleaved deciduous plantations
        
      • T423 : Early-stage broadleaved evergreen plantations
        
      • T424 : Early-stage coniferous plantations
        
      • T425 : Early-stage mixed broadleaved and coniferous plantations
        
      • T426 : Trees planted for early whole-tree harvesting
        
    • T43 : Recently felled areas
      
      • T431 : Recently felled areas, formerly broadleaved trees
        
      • T432 : Recently felled areas, formerly coniferous trees
        
      • T433 : Recently felled areas, formerly mixed broadleaved and coniferous trees
        
      • T434 : Shrubby clearings
        
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • U2 : Screes
    
    • U21 : Boreal and arctic siliceous scree and block field
      
    • U22 : Temperate high-mountain siliceous scree
      
    • U23 : Temperate, lowland to montane siliceous scree
      
    • U24 : Mediterranean siliceous scree
      
    • U25 : Boreal and arctic base-rich scree and block field
      
    • U26 : Temperate high-mountain base-rich scree and moraine
      
    • U27 : Temperate, lowland to montane base-rich scree
      
    • U28 : Western Mediterranean base-rich scree
      
    • U29 : Eastern Mediterranean base-rich scree
      
    • U2A : Crimean base-rich screes
      
  • U3 : Inland cliffs, rock pavements and outcrops
    
  • U4 : Snow or ice-dominated habitats
    
    • U41 : Snow pack
      
    • U42 : Ice cap and glacier
      
    • U43 : Rock glacier and unvegetated ice-dominated moraine
      
  • U5 : Miscellaneous inland habitats usually with very sparse or no vegetation
    
    • U51 : Fjell field
      
    • U52 : Polar desert
      
    • U53 : Glacial moraines with very sparse or no vegetation
      
  • U6 : Recent volcanic features
    
• V : Vegetated man-made habitats