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
        
        • MA2231 : Atlantic Juncus gerardii saltmeadows
          
        • MA2232 : Atlantic Plantago maritima saltmeadows
          
        • MA2233 : Atlantic Festuca rubra-Agrostis stolonifera swards
          
        • MA2234 : Atlantic Armeria maritima swards
          
        • MA2235 : Atlantic Carex distans beds
          
        • MA2236 : Atlantic Carex extensa saltmeadows
          
        • MA2237 : Atlantic Limonium vulgare meadows
          
        • MA2238 : Atlantic Blysmus salt meadows
          
        • MA2239 : Atlantic Eleocharis salt meadows
          
        • MA223A : Atlantic Juncus maritimus beds
          
        • MA223B : Atlantic Artemisia maritima salt meadows
          
        • MA223C : Atlantic Potentilla anserina carpets
          
        • MA223D : Atlantic Frankenia laevis communities
          
        • MA223E : Atlantic upper schorre Aster tripolium beds
          
        • MA223F : Atlantic Trifolium fragiferum swards
          
        • MA223G : Atlantic Carex nigra salt meadows
          
        • MA223H : Scandinavian Schoenus shore communities
          
        • MA223J : Northern Agrostis-Festuca-Leontodon communities
          
        • MA223K : Juncus maritimus mid-upper saltmarshes
          
        • MA223L : Juncus maritimus mid-upper saltmarshes with Triglochin maritima
          
        • MA223M : Eleocharis uniglumis mid-upper saltmarshes
          
        • MA223N : Blysmus rufus mid-upper saltmarshes
          
        • MA223P : Artemisia maritima with Festuca rubra, or open canopy of Artemisia maritima and Halimione mid-upper saltmarshes
          
        • MA223Q : Festuca rubra mid-upper saltmarshes
          
        • MA223R : Mid-upper saltmarshes: sub-communities of Festuca rubra with Agrostis stolonifera, Juncus gerardi, Puccinellia maritima, Glaux maritima, Triglochin maritima, Armeria maritima and Plantago maritima
          
        • MA223S : Saline beds of Phragmites australis
          
        • MA223T : Fenno-Scandian Calamagrostis stricta-sedge swards
          
      • MA224 : Atlantic mid-low 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
    
    • MA41 : Arctic littoral mixed sediment
      
    • MA42 : Atlantic littoral mixed sediment
      
    • MA43 : Baltic hydrolittoral mixed sediment
      
    • MA44 : Black Sea littoral mixed sediment
      
    • MA45 : Mediterranean littoral mixed sediment
      
  • MA5 : Littoral sand
    
  • MA6 : Littoral mud
    
  • MB1 : Infralittoral rock
    
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
    • MB41 : Arctic infralittoral mixed sediment
      
    • MB42 : Atlantic infralittoral mixed sediment
      
    • MB43 : Baltic infralittoral mixed sediment
      
    • MB44 : Black Sea infralittoral mixed sediment
      
    • MB45 : Mediterranean infralittoral mixed sediment
      
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
  • MC2 : Circalittoral biogenic habitat
    
    • MC21 : Arctic circalittoral biogenic habitat
      
    • MC22 : Atlantic circalittoral biogenic habitat
      
    • MC23 : Baltic circalittoral biogenic habitat
      
    • MC24 : Black Sea circalittoral biogenic habitat
      
    • MC25 : Mediterranean circalittoral biogenic habitat
      
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : 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
    
  • 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
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
  • 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