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
    
    • MH71 : Arctic fronts in reduced salinity water column
      
    • MH72 : Atlantic fronts in reduced salinity water column
      
    • MH73 : Baltic fronts in reduced salinity water column
      
    • MH74 : Black Sea fronts in reduced salinity water column
      
    • MH75 : Mediterranean fronts in reduced salinity water column
      
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
    • MH91 : Arctic vertically stratified water column with full salinity
      
    • MH92 : Atlantic vertically stratified water column with full salinity
      
    • MH93 : Baltic vertically stratified water column with full salinity
      
    • MH94 : Black Sea vertically stratified water column with full salinity
      
    • MH95 : Mediterranean 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
  
• 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
      
    • 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
    
• 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
    
    • U51 : Fjell field
      
    • U52 : Polar desert
      
    • U53 : Glacial moraines with very sparse or no vegetation
      
      • U531 : Unvegetated young glacial moraines
        
      • U532 : Sparsely vegetated glacial moraines
        
  • U6 : Recent volcanic features
    
    • U61 : Subarctic volcanic field
      
    • U62 : Mediterranean, Macaronesian and temperate volcanic field
      
• V : Vegetated man-made habitats
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
  • V3 : Artificial grasslands and herb dominated habitats
    
  • V4 : Hedgerows
    
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats