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
  
  • MH1 : Neuston
    
    • MH11 : Arctic neuston
      
    • MH12 : Atlantic neuston
      
      • MH121 : Atlantic temporary neuston layer
        
      • MH122 : Atlantic permanent neuston layer
        
    • MH13 : Baltic neuston
      
    • MH14 : Black Sea neuston
      
    • MH15 : Mediterranean neuston
      
  • MH2 : Completely mixed water column with reduced salinity
    
    • MH21 : Arctic completely mixed water column with reduced salinity
      
    • MH22 : Atlantic completely mixed water column with reduced salinity
      
    • MH23 : Baltic completely mixed water column with reduced salinity
      
    • MH24 : Black Sea completely mixed water column with reduced salinity
      
      • MH241 : Black Sea completely mixed water column with reduced salinity and short residence time
        
      • MH242 : Black Sea completely mixed water column with reduced salinity and medium residence time
        
      • MH243 : Black Sea completely mixed water column with reduced salinity and long residence time
        
    • MH25 : Mediterranean completely mixed water column with reduced salinity
      
      • MH251 : Mediterranean completely mixed water column with reduced salinity and short residence time
        
      • MH252 : Mediterraneancompletely mixed water column with reduced salinity and medium residence time
        
      • MH253 : Mediterranean completely mixed water column with reduced salinity and long residence time
        
  • MH3 : Completely mixed water column with full salinity
    
  • MH4 : Partially mixed water column with reduced salinity and medium or long residence time
    
  • MH5 : Unstratified water column with reduced salinity
    
  • MH6 : Vertically stratified water column with reduced salinity
    
  • MH7 : Fronts in reduced salinity water column
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
  • MJ1 : Sea ice
    
  • MJ2 : Freshwater ice
    
  • MJ3 : Brine channels
    
  • MJ4 : Under-ice habitat
    
• N : Coastal habitats
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
  • S3 : Temperate and mediterranean-montane scrub
    
  • S4 : Temperate shrub heathland
    
  • S5 : Maquis, arborescent matorral and thermo-Mediterranean scrub
    
  • S6 : Garrigue
    
  • S7 : Spiny Mediterranean heaths (phrygana, hedgehog-heaths and related coastal cliff vegetation)
    
  • S8 : Thermo-Atlantic xerophytic scrub
    
  • S9 : Riverine and fen scrubs
    
• 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
    
    • T21 : Mediterranean evergreen Quercus forest
      
      • T211 : Quercus suber forest
        
      • T212 : Quercus ilex and Q. rotundifolia forest
        
      • T213 : Quercus coccifera and Quercus alnifolia forest
        
    • T22 : Mainland laurophyllous forest
      
    • T23 : Macaronesian laurophyllous forest
      
    • T24 : Olea europaea-Ceratonia siliqua forest
      
    • T25 : Phoenix theophrasti vegetation
      
    • T26 : Phoenix canariensis vegetation
      
    • T27 : Ilex aquifolium forest
      
    • T28 : Macaronesian heathy forest
      
    • T29 : Broadleaved evergreen plantation of non site-native trees
      
    • T2A : Broadleaved evergreen plantation of site-native trees
      
  • T3 : Coniferous forest
    
  • 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
  
• V : Vegetated man-made habitats