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
  
  • Q1 : Raised and blanket bogs
    
  • Q2 : Valley mires, poor fens and transition mires
    
    • Q21 : Oceanic valley mire
      
    • Q22 : Poor fen
      
    • Q23 : Relict mire of Mediterranean mountains
      
    • Q24 : Intermediate fen and soft-water spring mire
      
    • Q25 : Non-calcareous quaking mire
      
      • Q251 : Carex lasiocarpa swards
        
      • Q252 : Carex diandra quaking mires
        
      • Q253 : Carex rostrata quaking mires
        
      • Q254 : Carex limosa swards
        
      • Q255 : Carex chordorrhiza swards
        
      • Q256 : Carex heleonastes swards
        
      • Q257 : Rhynchospora alba quaking bogs
        
      • Q258 : Sphagnum and Eriophorum rafts
        
      • Q259 : Menyanthes trifoliata and Potentilla palustris rafts
        
      • Q25A : Calla palustris mires
        
      • Q25B : Brown moss carpets
        
      • Q25C : Eriophorum vaginatum quaking bogs
        
      • Q25D : Molinia caerulea quaking bogs
        
      • Q25E : Calamagrostis stricta quaking bogs
        
      • Q25F : Scirpus hudsonianus (Trichophorum alpinum) quaking bogs
        
      • Q25G : Iberian quaking bogs
        
      • Q25H : Wet, open, acid peat and sand, with Rhynchospora alba and Drosera
        
      • Q25J : Balkanic quaking bogs
        
  • Q3 : Palsa mires
    
    • Q31 : Palsa mire
      
  • Q4 : Base-rich fens and calcareous spring mires
    
  • Q5 : Helophyte beds
    
  • Q6 : Periodically exposed shores
    
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
    • U11 : Cave
      
    • U12 : Disused underground mines and tunnels
      
  • 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