Habitat types key navigation

You can use the 'key navigation' function to identify a specific habitat by answering a set of questions. Starting from first question to next questions you select one of the possible answers. Here are samples of possible answers:
  • No ( 002 ) - Leading to question named '002'
  • Yes [ G ] - Leading to another questions subset of level G
  • No Factsheet icon[ E6 ] - Links directly to factsheet for E6
Additionally the diagram may be used for reference.

Category : (A1 )Littoral rock and other hard substrata
Diagram : Diagram icon

Question a01 :   Annual and opportunistic plant species?
   Habitats subject to irregular disturbance and thus dominated by annual species (ephemeral or opportunistic algae such as Enteromorpha or annual vascular plants) are separated (path = Yes). ‘Irregular disturbance’ includes: irregularly fluctuating water levels in non-tidal water (e.g. Baltic hydrolittoral); considerable freshwater run-off; unstable rock; sand-scoured rock. Habitats with more perennial communities, for example where water levels fluctuate on a regular cycle (tidal littoral) follow path = No.
Yes Factsheet icon [ A1.4 ] No (Question a02 )

Question a02 :   Cave / overhang?
   Habitats developed either in littoral rock caves or underneath overhangs are separated (path = Yes).
Yes Factsheet icon [ A1.4 ] No (Question a03 )

Question a03 :   Standing water left when tide recedes or from splash / spray?
   Rock pools (depressions filled by standing water left when tide recedes or by splash and spray, including those located in the supralittoral or geolittoral zone) (path = Yes) are distinguished from areas which are periodically submerged and drained.
Yes Factsheet icon [ A1.4 ] No (Question a04 )

Question a04 :   Energy level
   The criterion separates out habitats which have high energy status caused by wave action, currents or tidal streams from those with moderate energy or low to negligible energy. The energy status is that impacting on the area concerned at the relevant scale. Thus there may be enclaves of different energy status caused by localised variation in relief (e.g. steeper rock in more moderately exposed or even sheltered areas). Note that ‘high energy’ includes wave exposure classes extremely exposed, very exposed or exposed OR tidal streams/currents classes very strong or strong; ‘moderate energy’ includes wave exposure class moderately exposed OR tidal streams/currents class moderately strong; and ‘low to negligible energy‘ includes wave exposure classes sheltered, very sheltered, extremely sheltered or ultra sheltered OR tidal streams/currents classes weak or very weak or without any tidal stream or current. (See glossary.)
high energy Factsheet icon [ A1.1 ] moderate energy Factsheet icon [ A1.2 ] low to negligible energy Factsheet icon [ A1.3 ]

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