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)
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MA1 : Littoral rock
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MA11 : Arctic littoral rock
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MA12 : Atlantic littoral rock
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MA121 : Lichens or small green algae on Atlantic supralittoral and littoral fringe rock
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MA122 : Mytilus edulis and/or barnacle communities on wave-exposed Atlantic littoral rock
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MA123 : Seaweed communities on full salinity Atlantic littoral rock
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MA1231 : Fucus distichus and Fucus spiralis f. nana on extremely exposed upper eulittoral rock
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MA1232 : Corallina officinalis on exposed to moderately exposed lower eulittoral rock
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MA1233 : Himanthalia elongata and red seaweeds on exposed lower eulittoral rock
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MA1234 : Palmaria palmata on very exposed to moderately exposed lower eulittoral rock
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MA1235 : Mastocarpus stellatus and Chondrus crispus on very exposed to moderately exposed lower eulittoral rock
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MA1236 : Osmundea pinnatifida on moderately exposed mid eulittoral rock
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MA1237 : Ceramium sp. and piddocks on eulittoral fossilised peat
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MA1238 : Ascophyllum nodosum, sponges and ascidians on tide-swept mid eulittoral rock
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MA1239 : Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock
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MA123A : Fucus serratus with sponges, ascidians and red seaweeds on tide-swept lower eulittoral mixed substrata
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MA123B : Pelvetia canaliculata on sheltered littoral fringe rock
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MA123C : Fucus spiralis on sheltered upper eulittoral rock
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MA123D : Fucus vesiculosus on moderately exposed to sheltered mid eulittoral rock
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MA123E : Ascophyllum nodosum on very sheltered mid eulittoral rock
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MA123F : Fucus serratus on sheltered lower eulittoral rock
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MA123G : Enteromorpha spp. on freshwater-influenced and/or unstable upper eulittoral rock
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MA123H : Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock
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![Pelvetia canaliculata [and barnacles on moderately exposed littoral fringe rock](images/img_bullet.gif)
![Fucus spiralis [on full salinity exposed to moderately exposed upper eulittoral rock](images/img_bullet.gif)
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![Rhodothamniella floridula [on sand-scoured lower eulittoral rock](images/img_bullet.gif)
![Mytilus edulis [and] Fucus vesiculosus [on moderately exposed mid eulittoral rock](images/img_bullet.gif)
![Mytilus edulis, Fucus serratus [and red seaweeds on moderately exposed lower eulittoral rock](images/img_bullet.gif)
![Mytilus edulis [and piddocks on eulittoral firm clay](images/img_bullet.gif)
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