Tuesday 24 July 2012

Coralline Rockpools - Western Isles- Barra


 Rock pooling destination: Vatersay, Western Isles - Barra, June 2012

The shore at Vatersay is comprised of sand with pebbles and cobbles forming a bank on the upper shore. There is a rock out crop along the beach in which coralline rock pools can be found.

Within these rock pools the corraline crusts dominate with Corallina officinalis occurring around the edges and ephemeral green seaweeds and Osumdea spp. occurring in patches within the pools.

Limpet grazing restricts further algae growth and limits larval settlement of other species so that mussels are confined to crevices and barnacles occur in sporadic clumps.

Below are photographs of some of the organisms encountered whilst rock pooling in this habitat:

Vatersay

Ringed Plover breeding in the pebbles/cobble bank of the upper shore.
Biotope description: LS.LCS.Sh.BarSh (Barren littoral Shingle)

Coralline rockpools, Biotope description:
LR.FLR.Rkp.Cor (Coralline crust- dominated shallow eulittoral rockpools).
Limpets, Patella vulgata occur on the edges of the rockpools and the blue mussel, Mytulis edulis occurs within crevices, green seaweeds and Corallina officinalis occur as patches within the rockpools.

Corallina officinalis on the edge of the rockpool.


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