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
    
  • MH2 : Completely mixed water column with reduced salinity
    
  • 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
  
• 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
      
      • T141 : Mediterranean and Macaronesian Salix forest
        
      • T142 : Mediterranean riparian Populus forests
        
      • T143 : Mediterranean riparian Ulmus forests
        
      • T144 : Mediterranean riparian Fraxinus forests
        
      • T145 : Mediterranean riverine Ostrya carpinifolia galleries
        
      • T146 : Mediterraneo-Pontic riverine Fraxinus forests
        
      • T147 : Ponto-Sarmatic mixed Populus riverine forests
        
      • T148 : Irano-Anatolian mixed riverine forests
        
      • T149 : Platanus orientalis forests
        
      • T14A : Liquidambar orientalis forests
        
      • T14B : Southern Alnus and Betula galleries
        
    • 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
      
    • 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
      
      • T1E1 : Quercus - Fraxinus - Carpinus betulus forest on eutrophic and mesotrophic soils
        
      • T1E2 : Non-riverine Fraxinus forest
        
        • T1E21 : Fraxinus - Sorbus aucuparia - Mercurialis perennis forests
          
        • T1E22 : British Fraxinus - Acer campestre - Mercurialis perennis forests
          
        • T1E23 : Pyreneo-Cantabrian Fraxinus forests
          
        • T1E24 : Baltic Fraxinus - Acer pseudoplatanus forests with Adoxa moschatellina
          
        • T1E25 : Mixed Atlantic Fraxinus forests with Hyacinthoides non-scripta
          
        • T1E26 : Aquitanian Fraxinus forests
          
        • T1E27 : Sub-Atlantic Fraxinus forests
          
        • T1E28 : Lutetian calciphile Fraxinus forests
          
        • T1E29 : Post-cultural Fraxinus forests
          
      • T1E3 : Carpinus betulus forest
        
      • T1E4 : Tilia forest
        
      • T1E5 : Non-riverine Ulmus forest
        
      • T1E6 : Mixed deciduous forest of the Black and Caspian Seas
        
      • T1E7 : Eurosiberian Acer forests
        
    • 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
    
• 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