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
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
  • 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
      
      • R541 : Sub-Atlantic Pteridium aquilinum fields
        
      • R542 : Macaronesian Pteridium aquilinum fields
        
      • R543 : Supra-Mediterranean Pteridium aquilinum fields
        
    • R55 : Lowland moist or wet tall-herb and fern fringe
      
      • R551 : Screens or veils of perennial tall herbs lining watercourses
        
      • R552 : Tall-herb communities of humid meadows
        
      • R553 : Shady woodland edge fringes
        
      • R554 : Mediterranean grasslands on alluvial river banks
        
    • R56 : Montane to subalpine moist or wet tall-herb and fern fringe
      
    • R57 : Herbaceous forest clearing vegetation
      
  • R6 : Inland salt steppes and salt marshes
    
  • R7 : Sparsely wooded grasslands
    
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
    • S21 : Subarctic and alpine dwarf Salix scrub
      
    • S22 : Alpine and subalpine ericoid heath
      
    • S23 : Alpine and subalpine Juniperus scrub
      
    • S24 : Subalpine genistoid scrub of the Amphi-Adriatic region
      
    • S25 : Subalpine and subarctic deciduous scrub
      
      • S251 : Mountain Alnus brush
        
      • S252 : Subalpine and oroboreal Salix brush
        
      • S253 : Subalpine mixed brushes
        
      • S254 : Oroboreal Betula scrub
        
    • S26 : Subalpine Pinus mugo scrub
      
    • S27 : Krummholz with conifers other than Pinus mugo
      
  • 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
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats