Verrucaria maura on littoral fringe rock
Bedrock or stable boulders and cobbles in the littoral fringe which is covered by the black lichen Verrucaria maura. This lichen typically covers the entire rock surface giving a distinct black band in the upper littoral fringe. The winkle Littorina saxatilis is usually present. Two variants are defined which both occur in a wide range of wave exposures. On exposed shores V. maura may occur with sparse barnacles such as Chthamalus spp. or Semibalanus balanoides and may be covered by a band of ephemeral seaweeds such as Porphyra umbilicalis or Enteromorpha spp. (MA1-2131). Above MA1-2131 or on more sheltered shores is a species poor community consisting mainly of V. maura and L. saxatilis (MA1-2132).
Situation: This biotope occurs below the yellow and grey lichen zone (MA1-211) and above eulittoral communities of barnacles and fuciod algae.
Temporal variation: Distinct band of red or green ephemeral algae may obscure the black lichen band at certain times of the year.
Source: EUNIS habitat classification
|EUNIS habitat type||code MA1213|
|Relation to||Resolution 4 habitat type (used for designation of Emerald sites)|
Relation to other habitat types mentioned in legal instruments
Relation to vegetation types (syntaxa)Not available
Species mentioned in habitat description
|Classification||Code||Habitat type name||Relationship type|
|EUNIS Habitat Classification 2007 (revised descriptions 2012)||B3.113||Verrucaria maura on littoral fringe rock||same|
|Classification||Code||Habitat type name||Relationship type||Comment|
|EUNIS Habitat Classification 200410||B3.113||Verrucaria maura on littoral fringe rock||same|
|EUNIS Habitat Classification 200308||B3.113||Verrucaria maura on littoral fringe rock||same|
|EUNIS Habitat Classification 200202||B3.113||Verrucaria maura on littoral fringe rock||same|
|EUNIS Habitat Classification 199910||B3.113||Verrucaria maura on littoral fringe rock||same|
|MNCR BioMar 97.06 (Britain & Ireland)||LR.L.Ver||Verrucaria maura on littoral fringe rock||same|