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)
  
  • MA1 : Littoral rock
    
  • MA2 : Littoral biogenic habitat
    
    • MA21 : Arctic Littoral biogenic habitat
      
    • MA22 : Atlantic littoral biogenic habitat
      
      • MA221 : Atlantic saltmarsh driftlines
        
      • MA222 : Atlantic upper saltmarshes
        
      • MA223 : Atlantic upper-mid saltmarshes and saline and brackish reed, rush and sedge beds
        
      • MA224 : Atlantic mid-low saltmarshes
        
        • MA2241 : Atlantic Puccinellia maritima lawns
          
        • MA2242 : Halimione portulacoides -Puccinellia maritima meadows
          
        • MA2243 : Puccinellia maritima-Aster tripolium meadows
          
        • MA2244 : Salicornia-Sueda maritima-Puccinellia maritima meadows
          
        • MA2245 : Atlantic Halimione pedunculata beds
          
        • MA2246 : Pelvetia-Puccinellia maritima meadows
          
        • MA2247 : Catabrosa-Puccinellia maritima meadows
          
        • MA2248 : Glaux maritima-Puccinellia maritima meadows
          
        • MA2249 : Plantago maritima-Puccinellia maritima meadows
          
        • MA224A : Limonium-Puccinellia maritima meadows
          
        • MA224B : Halimione portulacoides low-mid saltmarshes
          
        • MA224C : Puccinellia maritima low-mid saltmarshes
          
        • MA224D : Sub-communities of Puccinellia maritima saltmarsh with Limonium vulgare and Armeria maritima; P. maritima with Glaux maritima co-dominant in species-poor vegetation; Puccinellia maritima with Plantago maritima and/or Armeria maritima
          
        • MA224E : Annual Salicornia, Suaeda and Puccinellia maritima low-mid saltmarshes
          
      • MA225 : Atlantic pioneer saltmarshes
        
      • MA226 : Sabellaria reefs in the Atlantic littoral zone
        
      • MA227 : Bivalve reefs in the Atlantic littoral zone
        
      • MA228 : Atlantic littoral Cyperaceae beds
        
    • MA23 : Baltic hydrolittoral biogenic habitat
      
    • MA24 : Black sea littoral biogenic habitat
      
    • MA25 : Mediterranean littoral biogenic habitat
      
  • MA3 : Littoral coarse sediment
    
  • MA4 : Littoral mixed sediment
    
  • MA5 : Littoral sand
    
  • MA6 : Littoral mud
    
  • MB1 : Infralittoral rock
    
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
    • MC11 : Arctic circalittoral rock
      
    • MC12 : Atlantic circalittoral rock
      
    • MC13 : Baltic ciralittoral rock
      
      • MC131 : Baltic ciralittoral rock and boulders characterized by sparse epibenthic bivalves
        
      • MC132 : Baltic ciralittoral rock and boulders characterized by epibenthic chordates
        
      • MC133 : Baltic ciralittoral rock and boulders characterized by epibenthic cnidarians
        
      • MC134 : Baltic ciralittoral rock and boulders characterized by epibenthic Bryozoa
        
      • MC135 : Baltic ciralittoral rock and boulders characterized by epibenthic crustacea
        
      • MC136 : Baltic ciralittoral rock and boulders characterized by epibenthic sponges
        
      • MC137 : Baltic ciralittoral rock and boulderscharacterized by mixed epibenthic macrocommunity
        
      • MC138 : Baltic ciralittoral rock and boulders characterized by sparse epibenthic macrocommunity.
        
      • MC139 : Baltic ciralittoral rock and boulders characterized by no macrocommunity
        
      • MC13A : Baltic ciralittoral hard clay characterized by epibenthic bivalves
        
      • MC13B : Baltic ciralittoral hard clay characterized by mixed epibenthic macrocommunity
        
      • MC13C : Baltic ciralittoral hard clay characterized by sparse epibenthic macrocommunity
        
      • MC13D : Baltic ciralittoral hard clay characterized by no macrocommunity
        
      • MC13E : Baltic ciralittoral hard bottoms characterized by marl (marlstone rock)
        
      • MC13F : Baltic ciralittoral hard bottoms characterized by ferromanganese concretion bottoms
        
      • MC13G : Baltic circalittoral hard anthropogenically created substrates
        
    • MC14 : Black Sea circalittoral rock
      
    • MC15 : Mediterranean circalittoral rock
      
  • MC2 : Circalittoral biogenic habitat
    
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
    • MC61 : Arctic circalittoral mud
      
    • MC62 : Atlantic circalittoral mud
      
      • MC621 : Faunal communities of Atlantic circalittoral mud
        
      • MC622 : Vents and seeps in Atlantic circalittoral mud
        
    • MC63 : Baltic circalittoral mud
      
    • MC64 : Black Sea circalittoral mud
      
    • MC65 : Mediterranean circalittoral mud
      
  • MD1 : Offshore circalittoral rock
    
  • MD2 : Offshore circalittoral biogenic habitat
    
  • MD3 : Offshore circalittoral coarse sediment
    
  • MD4 : Offshore circalittoral mixed sediment
    
  • MD5 : Offshore circalittoral sand
    
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
  • ME3 : Upper bathyal coarse sediment
    
  • ME4 : Upper bathyal mixed sediment
    
  • ME5 : Upper Bathyal sand
    
  • ME6 : Upper Bathyal mud
    
  • MF1 : Lower bathyal rock
    
  • MF2 : Lower bathyal biogenic habitat
    
  • MF3 : Lower bathyal coarse sediment
    
  • MF4 : Lower bathyal mixed sediment
    
  • MF5 : Lower bathyal sand
    
  • MF6 : Lower bathyal mud
    
  • MG1 : Abyssal rock
    
  • MG2 : Abyssal biogenic habitat
    
  • MG3 : Abyssal coarse sediment
    
  • MG4 : Abyssal mixed sediment
    
  • MG5 : Abyssal sand
    
  • MG6 : Abyssal mud
    
• 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
    
    • 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
      
      • MH951 : Mediterranean water column with ephemeral thermal stratification and full salinity
        
      • MH952 : Mediterranean water column with seasonal thermal stratification and full salinity
        
      • MH953 : Mediterranean water column with permanent thermal stratification and full salinity
        
      • MH954 : Mediterranean water column with ephemeral halocline and full salinity
        
      • MH955 : Mediterranean water column with seasonal halocline and full salinity
        
      • MH956 : Mediterranean water column with permanent halocline and full salinity
        
      • MH957 : Mediterranean water column with ephemeral oxygen stratification and full salinity
        
      • MH958 : Mediterranean water column with seasonal oxygen stratification and full salinity
        
      • MH959 : Mediterranean water column with permanent oxygen stratification and 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
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats