Concept
Fucus serratus, sponges and ascidians on tide-swept lower eulittoral rock
| URI | http://vocab.nerc.ac.uk/collection/M24/current/LRSLRFFSERRT/1/ | |
|---|---|---|
| Within Vocab | Marine Habitat Classification for Britain and Ireland Version 97.06 | |
| Alternative Labels | LR.SLR.F.Fserr.T | |
| Definition | Very sheltered lower eulittoral bedrock, boulders and cobbles that are subject to increased tidal water movement are characterised by Fucus serratus, sponges and ascidians. Species richness is generally greater than in the non tide-swept F. serratus biotope (Fser.Fser), with a greater abundance and wider range of foliose red seaweeds. The increased water movement encourages several filter-feeding faunal groups to occur. The sponges Grantia compressa, Leucosolenia spp., Halichondria panicea and Hymeniacidon perleve occur frequently on steep and overhanging faces. In addition, the ascidians Ascidiella scabra, Dendrodoa grossularia and colonial ascidians are also found in this biotope. Areas where increased tidal movement influences such a community are in the narrows and/or intertidal sills of Scottish sealochs and rias in south-west England. In the few cases where the rock is also subject to variable salinity, an impoverished community results and records should be classified as Fserr.VS rather than the present biotope. | |
| Date | 2019-11-26T11:41:44 | |
| Identifier | SDN:M24::LRSLRFFSERRT | |
| Note | accepted | |
| Is Version Of | LRSLRFFSERRT | |
| version | 1 | |
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