Description of biotope or habitat type
Pelvetia canaliculata on sheltered variable salinity littoral fringe rock
Habitat (physical) description
|Salinity||Variable (18-35 ppt)|
|Wave exposure||Very sheltered, Extremely sheltered|
|Substratum||Bedrock; boulders; cobbles|
|Zone||Littoral fringe - lower|
|Depth Band||Upper shore|
Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.
- Records used to define the biotope (core records)
- Other records assigned to this biotope, marked as 'certain'
- Other records assigned to this biotope, marked as 'uncertain'
Point data based on records in the UK Marine Recorder Snapshot.
Lower littoral fringe bedrock or stable boulders and mixed substrata on very sheltered to extremely sheltered variable salinity shores characterised by a dense cover of the wrack Pelvetia canaliculata, which often overgrows a crust of black lichens Verrucaria maura. The wrack Fucus spiralis can be present among the P. canaliculata. This biotope lacks the density of barnacles found among the P. canaliculata on more exposed shores though the occasional Semibalanus balanoides or Elminius modestus can be found. The winkle Littorina saxatilis occurs, as do a variety of amphipods. The red alga Catenella caespitosa can be present in more shaded areas as well as the green seaweed Enteromorpha intestinalis.
This biotope are found in the lower littoral fringe on sheltered shores below biotopes dominated by V. maura (Ver.Ver) and above biotopes dominated by F. spiralis (Fspi).
|Taxon||Relative importance of taxon for defining this community (%)||Typical abundance - SACFOR scale||% of core records where taxon was recorded|
|Elminius modestus||3||Occasional||21-40 %|
|Semibalanus balanoides||2||Occasional||21-40 %|
|Littorina saxatilis||7||Frequent||41-60 %|
|Catenella caespitosa||4||Frequent||41-60 %|
|Fucus spiralis||3||Occasional||41-60 %|
|Pelvetia canaliculata||54||Common||81-100 %|
|Enteromorpha intestinalis||3||Occasional||21-40 %|
|Verrucaria maura||14||Common||61-80 %|
|97.06||SLR.Pel in part|