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
    
    • MJ11 : Arctic sea ice
      
    • MJ12 : Baltic sea ice
      
  • MJ2 : Freshwater ice
    
    • MJ21 : Arctic freshwater ice
      
  • MJ3 : Brine channels
    
    • MJ31 : Arctic brine channels
      
    • MJ32 : Baltic brine channels
      
  • MJ4 : Under-ice habitat
    
    • MJ41 : Arctic under-ice habitat
      
    • MJ42 : Baltic under-ice habitat
      
• N : Coastal habitats
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
    • R41 : Snow-bed vegetation
      
      • R411 : Boreo-alpine acidocline snow-patch grassland and herb habitats
        
        • R4111 : Alpic acid moss snow-patch communities
          
        • R4112 : Alpic acid cudweed snow-patch communities
          
        • R4113 : Luzula spadicea snow patch communities
          
        • R4114 : Hercynian acid snow patch communities
          
        • R4115 : Boreal moss snowbed communities
          
        • R4116 : Boreo-alpine Deschampsia-Anthoxanthum communities
          
        • R4117 : Boreo-alpine herb-rich acid snowbed communities
          
        • R4118 : Boreo-alpine acidocline sedge and rush snowbed communities
          
      • R412 : Boreo-alpine calcicline snow-patch grassland and herb habitats
        
      • R413 : Ponto-Caucasian snow-patch grassland
        
      • R414 : Boreo-alpine fern snowbed grassland
        
    • R42 : Boreal and arctic acidophilous alpine grassland
      
    • R43 : Temperate acidophilous alpine grassland
      
    • R44 : Arctic-alpine calcareous grassland
      
    • R45 : Alpine and subalpine calcareous grassland of the Balkans and Apennines
      
  • R5 : Forest fringes and clearings and tall forb stands
    
    • R51 : Thermophilous forest fringe of base-rich soils
      
    • R52 : Forest fringe of acidic nutrient-poor soils
      
    • R53 : Macaronesian thermophilous forest fringe
      
    • R54 : Pteridium aquilinum vegetation
      
    • R55 : Lowland moist or wet tall-herb and fern fringe
      
    • R56 : Montane to subalpine moist or wet tall-herb and fern fringe
      
      • R561 : Alpic tall-herb communities
        
      • R562 : Alpic tall grass communities
        
      • R563 : Pyreneo-Iberian tall-herb communities
        
      • R564 : Ibero-Mauritanian tall-herb communities
        
      • R565 : Corsican Cymbalaria tall-herb communities
        
      • R566 : Corsican Doronicum tall-herb communities
        
      • R567 : Eastern oro-Mediterranean and Balkan tall-herb communities
        
      • R568 : Alpine Rumex communities
        
      • R569 : Oro-boreal tall-herb communities
        
      • R56A : Ponto-Caucasian tall-herb communities
        
      • R56B : Alpine and subalpine fern stands
        
    • R57 : Herbaceous forest clearing vegetation
      
  • R6 : Inland salt steppes and salt marshes
    
  • R7 : Sparsely wooded grasslands
    
• 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
      
    • 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
      
    • T3F : Dark taiga
      
    • T3G : Pinus sylvestris light taiga
      
    • T3H : Larix light 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
  
• V : Vegetated man-made habitats